./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY --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 c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:44:11,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:44:11,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:44:11,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:44:11,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:44:11,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:44:11,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:44:11,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:44:11,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:44:11,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:44:11,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:44:11,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:44:11,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:44:11,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:44:11,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:44:11,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:44:11,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:44:11,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:44:11,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:44:11,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:44:11,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:44:11,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:44:11,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:44:11,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:44:11,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:44:11,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:44:11,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:44:11,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:44:11,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:44:11,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:44:11,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:44:11,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:44:11,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:44:11,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:44:11,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:44:11,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:44:11,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:44:11,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:44:11,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:44:11,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:44:11,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:44:11,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:44:11,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:44:11,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:44:11,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:44:11,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:44:11,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:44:11,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:44:11,435 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:44:11,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:44:11,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:44:11,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:44:11,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:44:11,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:44:11,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:44:11,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:44:11,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:44:11,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:44:11,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:44:11,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:44:11,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:44:11,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:44:11,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:44:11,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:44:11,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:44:11,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:44:11,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:44:11,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:44:11,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:44:11,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:44:11,442 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:44:11,442 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:44:11,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:44:11,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:44:11,443 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_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 [2021-11-07 07:44:11,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:44:11,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:44:11,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:44:11,714 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:44:11,715 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:44:11,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2021-11-07 07:44:11,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/data/71ce02a88/424df77afbd149eab019001768e38b2a/FLAG1b0028039 [2021-11-07 07:44:12,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:44:12,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2021-11-07 07:44:12,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/data/71ce02a88/424df77afbd149eab019001768e38b2a/FLAG1b0028039 [2021-11-07 07:44:12,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/data/71ce02a88/424df77afbd149eab019001768e38b2a [2021-11-07 07:44:12,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:44:12,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:44:12,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:44:12,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:44:12,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:44:12,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf6d5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12, skipping insertion in model container [2021-11-07 07:44:12,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:44:12,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:44:12,806 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] [2021-11-07 07:44:12,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:44:12,832 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:44:12,843 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] [2021-11-07 07:44:12,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:44:12,856 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:44:12,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12 WrapperNode [2021-11-07 07:44:12,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:44:12,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:44:12,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:44:12,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:44:12,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:44:12,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:44:12,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:44:12,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:44:12,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:44:12,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:44:12,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:44:12,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:44:12,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (1/1) ... [2021-11-07 07:44:12,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:44:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:12,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:44:12,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:44:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:44:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:44:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:44:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:44:13,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:44:13,142 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 07:44:13,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:44:13 BoogieIcfgContainer [2021-11-07 07:44:13,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:44:13,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:44:13,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:44:13,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:44:13,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:44:12" (1/3) ... [2021-11-07 07:44:13,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21560897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:44:13, skipping insertion in model container [2021-11-07 07:44:13,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:44:12" (2/3) ... [2021-11-07 07:44:13,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21560897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:44:13, skipping insertion in model container [2021-11-07 07:44:13,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:44:13" (3/3) ... [2021-11-07 07:44:13,156 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2021-11-07 07:44:13,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:44:13,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:44:13,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:44:13,208 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:44:13,208 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:44:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-11-07 07:44:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:44:13,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:13,229 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:44:13,229 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-11-07 07:44:13,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:13,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829870493] [2021-11-07 07:44:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:13,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:13,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:13,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829870493] [2021-11-07 07:44:13,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829870493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:13,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:13,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:44:13,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407368444] [2021-11-07 07:44:13,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:44:13,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:13,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:44:13,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:44:13,411 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-07 07:44:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:13,440 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-07 07:44:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:44:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-07 07:44:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:13,466 INFO L225 Difference]: With dead ends: 20 [2021-11-07 07:44:13,481 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 07:44:13,484 INFO L786 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 [2021-11-07 07:44:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 07:44:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 07:44:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-11-07 07:44:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-07 07:44:13,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-07 07:44:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:13,530 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-07 07:44:13,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-07 07:44:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-07 07:44:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:44:13,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:13,531 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:44:13,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:44:13,531 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-11-07 07:44:13,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:13,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829202888] [2021-11-07 07:44:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:13,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:13,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:13,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829202888] [2021-11-07 07:44:13,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829202888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:13,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:13,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:13,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131183902] [2021-11-07 07:44:13,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:44:13,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:44:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:44:13,659 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-07 07:44:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:13,686 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-11-07 07:44:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:44:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-07 07:44:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:13,691 INFO L225 Difference]: With dead ends: 16 [2021-11-07 07:44:13,691 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 07:44:13,692 INFO L786 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 [2021-11-07 07:44:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 07:44:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-07 07:44:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-11-07 07:44:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-07 07:44:13,698 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-07 07:44:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:13,698 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-07 07:44:13,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-07 07:44:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-07 07:44:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:44:13,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:13,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:13,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:44:13,702 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-11-07 07:44:13,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:13,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267605898] [2021-11-07 07:44:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:13,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:13,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:13,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267605898] [2021-11-07 07:44:13,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267605898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:13,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210526907] [2021-11-07 07:44:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:13,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:13,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:13,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:13,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:44:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:44:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:13,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210526907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:13,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:13,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:44:13,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490493089] [2021-11-07 07:44:13,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:44:13,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:44:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:44:13,934 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-07 07:44:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:13,973 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-11-07 07:44:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:44:13,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 8 [2021-11-07 07:44:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:13,976 INFO L225 Difference]: With dead ends: 18 [2021-11-07 07:44:13,977 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 07:44:13,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:44:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 07:44:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-07 07:44:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2021-11-07 07:44:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-07 07:44:13,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-07 07:44:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:13,981 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-07 07:44:13,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-07 07:44:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-07 07:44:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:44:13,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:13,982 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:14,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:14,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:14,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-11-07 07:44:14,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:14,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839655133] [2021-11-07 07:44:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:14,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:44:14,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:14,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839655133] [2021-11-07 07:44:14,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839655133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:44:14,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:44:14,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:44:14,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144220465] [2021-11-07 07:44:14,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:44:14,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:44:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:44:14,323 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-07 07:44:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:14,338 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-07 07:44:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:44:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-11-07 07:44:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:14,340 INFO L225 Difference]: With dead ends: 18 [2021-11-07 07:44:14,340 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 07:44:14,341 INFO L786 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 [2021-11-07 07:44:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 07:44:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-07 07:44:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-11-07 07:44:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-07 07:44:14,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-11-07 07:44:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:14,349 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-07 07:44:14,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-07 07:44:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-07 07:44:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:44:14,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:14,350 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:14,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:44:14,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-11-07 07:44:14,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:14,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061483596] [2021-11-07 07:44:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:14,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:14,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:14,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061483596] [2021-11-07 07:44:14,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061483596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:14,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129725873] [2021-11-07 07:44:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:14,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:14,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:14,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:14,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:44:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:44:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:14,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129725873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:14,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:14,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 07:44:14,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667049805] [2021-11-07 07:44:14,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:44:14,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:44:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:44:14,560 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-11-07 07:44:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:14,594 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-07 07:44:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:44:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 [2021-11-07 07:44:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:14,596 INFO L225 Difference]: With dead ends: 22 [2021-11-07 07:44:14,596 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 07:44:14,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:44:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 07:44:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 07:44:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-11-07 07:44:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 07:44:14,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-11-07 07:44:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:14,601 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 07:44:14,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-11-07 07:44:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 07:44:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:44:14,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:14,602 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:14,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:14,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:14,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2021-11-07 07:44:14,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:14,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454450469] [2021-11-07 07:44:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:14,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:14,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:14,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454450469] [2021-11-07 07:44:14,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454450469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:14,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610748297] [2021-11-07 07:44:14,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:14,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:14,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:14,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:44:14,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:14,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:44:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:15,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610748297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:15,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:15,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 07:44:15,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419136517] [2021-11-07 07:44:15,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:44:15,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:44:15,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:44:15,045 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-07 07:44:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:15,077 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-07 07:44:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:44:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 [2021-11-07 07:44:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:15,078 INFO L225 Difference]: With dead ends: 24 [2021-11-07 07:44:15,079 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 07:44:15,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:44:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 07:44:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 07:44:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2021-11-07 07:44:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-07 07:44:15,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-11-07 07:44:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-07 07:44:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-07 07:44:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-07 07:44:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:44:15,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:15,084 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:15,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:15,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 07:44:15,285 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 3 times [2021-11-07 07:44:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:15,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243011541] [2021-11-07 07:44:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:15,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:15,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243011541] [2021-11-07 07:44:15,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243011541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:15,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405654810] [2021-11-07 07:44:15,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:15,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:15,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:15,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:15,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:44:15,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:44:15,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:15,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:44:15,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 07:44:15,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405654810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:15,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:15,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-11-07 07:44:15,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004735956] [2021-11-07 07:44:15,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:44:15,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:44:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:44:15,466 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-11-07 07:44:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:15,510 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-11-07 07:44:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:44:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 16 [2021-11-07 07:44:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:15,512 INFO L225 Difference]: With dead ends: 29 [2021-11-07 07:44:15,513 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 07:44:15,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:44:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 07:44:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-07 07:44:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2021-11-07 07:44:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-07 07:44:15,535 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-11-07 07:44:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:15,536 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-07 07:44:15,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-11-07 07:44:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-07 07:44:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:44:15,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:15,537 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:15,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:15,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:15,754 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash -885484758, now seen corresponding path program 4 times [2021-11-07 07:44:15,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:15,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002184027] [2021-11-07 07:44:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:15,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:15,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:15,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002184027] [2021-11-07 07:44:15,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002184027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:15,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515753286] [2021-11-07 07:44:15,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:15,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:15,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:15,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:15,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:44:15,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:15,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:44:15,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:16,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515753286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:16,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:16,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 07:44:16,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391496744] [2021-11-07 07:44:16,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:44:16,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:16,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:44:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:44:16,023 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-11-07 07:44:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:16,050 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-07 07:44:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:44:16,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 [2021-11-07 07:44:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:16,051 INFO L225 Difference]: With dead ends: 32 [2021-11-07 07:44:16,052 INFO L226 Difference]: Without dead ends: 23 [2021-11-07 07:44:16,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:44:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-07 07:44:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-07 07:44:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2021-11-07 07:44:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-07 07:44:16,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-11-07 07:44:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:16,057 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-07 07:44:16,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-11-07 07:44:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-07 07:44:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:44:16,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:16,058 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:16,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:16,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:16,270 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:16,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 5 times [2021-11-07 07:44:16,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:16,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586337469] [2021-11-07 07:44:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:16,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:16,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:16,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586337469] [2021-11-07 07:44:16,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586337469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:16,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815950600] [2021-11-07 07:44:16,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:16,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:16,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:16,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:44:16,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 07:44:16,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:16,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:44:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:16,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815950600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:16,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:16,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:44:16,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392994805] [2021-11-07 07:44:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:44:16,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:44:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:44:16,524 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-11-07 07:44:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:16,554 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-07 07:44:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:44:16,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 22 [2021-11-07 07:44:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:16,557 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:44:16,557 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 07:44:16,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:44:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 07:44:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-07 07:44:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-11-07 07:44:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-07 07:44:16,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2021-11-07 07:44:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:16,561 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-07 07:44:16,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-11-07 07:44:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-07 07:44:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:44:16,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:16,562 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:16,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:16,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:16,782 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 6 times [2021-11-07 07:44:16,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:16,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320754327] [2021-11-07 07:44:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:16,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:16,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:16,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320754327] [2021-11-07 07:44:16,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320754327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:16,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32151521] [2021-11-07 07:44:16,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:16,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:16,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:16,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:44:16,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-07 07:44:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:44:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:17,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32151521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:17,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:17,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-11-07 07:44:17,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197244648] [2021-11-07 07:44:17,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:44:17,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:44:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:44:17,096 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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) [2021-11-07 07:44:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:17,155 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-11-07 07:44:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:44:17,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 24 [2021-11-07 07:44:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:17,157 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:44:17,157 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 07:44:17,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:44:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 07:44:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-07 07:44:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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) [2021-11-07 07:44:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-07 07:44:17,162 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-11-07 07:44:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:17,162 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-07 07:44:17,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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) [2021-11-07 07:44:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-07 07:44:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:44:17,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:17,164 INFO L513 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:17,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:17,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:44:17,390 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 7 times [2021-11-07 07:44:17,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:17,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480961591] [2021-11-07 07:44:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:17,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:17,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:17,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480961591] [2021-11-07 07:44:17,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480961591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:17,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198506275] [2021-11-07 07:44:17,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:17,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:17,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:17,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:17,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:44:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:44:17,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:17,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198506275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:17,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:17,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 07:44:17,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269278526] [2021-11-07 07:44:17,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:44:17,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:44:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:44:17,717 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2021-11-07 07:44:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:17,758 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-07 07:44:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:44:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 [2021-11-07 07:44:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:17,759 INFO L225 Difference]: With dead ends: 42 [2021-11-07 07:44:17,759 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 07:44:17,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:44:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 07:44:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-07 07:44:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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) [2021-11-07 07:44:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-07 07:44:17,764 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-11-07 07:44:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:17,765 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-07 07:44:17,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2021-11-07 07:44:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-07 07:44:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:44:17,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:17,766 INFO L513 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:17,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:17,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:44:17,982 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:17,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 8 times [2021-11-07 07:44:17,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:17,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907854780] [2021-11-07 07:44:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:17,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:18,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:18,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907854780] [2021-11-07 07:44:18,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907854780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:18,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983484481] [2021-11-07 07:44:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:18,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:18,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:18,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:44:18,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:18,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:44:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:18,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983484481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:18,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:18,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 07:44:18,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76477937] [2021-11-07 07:44:18,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:44:18,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:44:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:18,342 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-11-07 07:44:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:18,392 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-07 07:44:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:44:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 [2021-11-07 07:44:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:18,395 INFO L225 Difference]: With dead ends: 44 [2021-11-07 07:44:18,395 INFO L226 Difference]: Without dead ends: 35 [2021-11-07 07:44:18,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-07 07:44:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-07 07:44:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) [2021-11-07 07:44:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-07 07:44:18,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2021-11-07 07:44:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:18,412 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-07 07:44:18,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-11-07 07:44:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-07 07:44:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:44:18,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:18,415 INFO L513 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:18,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:18,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:44:18,635 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash 653864095, now seen corresponding path program 9 times [2021-11-07 07:44:18,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:18,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477846398] [2021-11-07 07:44:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:18,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:44:18,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:18,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477846398] [2021-11-07 07:44:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477846398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:18,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924157572] [2021-11-07 07:44:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:18,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:18,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:18,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:44:18,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 07:44:18,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:44:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-07 07:44:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924157572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:19,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:19,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2021-11-07 07:44:19,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173004199] [2021-11-07 07:44:19,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:44:19,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:44:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:19,025 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-11-07 07:44:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:19,099 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-07 07:44:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:44:19,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 34 [2021-11-07 07:44:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:19,102 INFO L225 Difference]: With dead ends: 49 [2021-11-07 07:44:19,102 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 07:44:19,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 07:44:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-07 07:44:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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) [2021-11-07 07:44:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-07 07:44:19,107 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2021-11-07 07:44:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:19,107 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-07 07:44:19,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-11-07 07:44:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-07 07:44:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:44:19,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:19,108 INFO L513 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:19,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:19,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:19,317 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 10 times [2021-11-07 07:44:19,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:19,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272088281] [2021-11-07 07:44:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:19,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:44:19,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:19,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272088281] [2021-11-07 07:44:19,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272088281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:19,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298491772] [2021-11-07 07:44:19,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:19,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:19,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:19,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:19,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:44:19,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:19,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:19,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:44:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:44:19,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298491772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:19,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:19,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:44:19,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531986809] [2021-11-07 07:44:19,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:44:19,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:44:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:44:19,703 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2021-11-07 07:44:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:19,745 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-11-07 07:44:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:44:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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 [2021-11-07 07:44:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:19,747 INFO L225 Difference]: With dead ends: 52 [2021-11-07 07:44:19,747 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 07:44:19,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:44:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 07:44:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-07 07:44:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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) [2021-11-07 07:44:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-07 07:44:19,752 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2021-11-07 07:44:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-07 07:44:19,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2021-11-07 07:44:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-07 07:44:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:44:19,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:19,754 INFO L513 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:19,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:19,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:19,969 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 11 times [2021-11-07 07:44:19,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:19,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320712301] [2021-11-07 07:44:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:19,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:44:20,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:20,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320712301] [2021-11-07 07:44:20,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320712301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:20,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902486648] [2021-11-07 07:44:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:20,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:20,129 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:20,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:44:20,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:44:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:44:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:44:20,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902486648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:20,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:20,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:44:20,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324173671] [2021-11-07 07:44:20,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:44:20,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:44:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:20,399 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-07 07:44:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:20,437 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-11-07 07:44:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:44:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 40 [2021-11-07 07:44:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:20,439 INFO L225 Difference]: With dead ends: 54 [2021-11-07 07:44:20,439 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 07:44:20,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 07:44:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-07 07:44:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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) [2021-11-07 07:44:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-07 07:44:20,444 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2021-11-07 07:44:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:20,445 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-07 07:44:20,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-07 07:44:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-07 07:44:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 07:44:20,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:20,446 INFO L513 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:20,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:20,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:20,673 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash 172515501, now seen corresponding path program 12 times [2021-11-07 07:44:20,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:20,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142500175] [2021-11-07 07:44:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:20,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:44:20,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:20,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142500175] [2021-11-07 07:44:20,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142500175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:20,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548734577] [2021-11-07 07:44:20,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:20,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:20,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:20,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:44:21,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-07 07:44:21,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:21,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:44:21,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 07:44:21,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548734577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:21,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:21,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2021-11-07 07:44:21,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998513616] [2021-11-07 07:44:21,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:44:21,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:21,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:44:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:44:21,167 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2021-11-07 07:44:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:21,244 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-11-07 07:44:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:44:21,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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 42 [2021-11-07 07:44:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:21,246 INFO L225 Difference]: With dead ends: 59 [2021-11-07 07:44:21,246 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:44:21,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:44:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:44:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-07 07:44:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 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) [2021-11-07 07:44:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-07 07:44:21,264 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2021-11-07 07:44:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:21,265 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-07 07:44:21,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2021-11-07 07:44:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-07 07:44:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:44:21,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:21,271 INFO L513 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:21,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-07 07:44:21,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:44:21,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 13 times [2021-11-07 07:44:21,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:21,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878814972] [2021-11-07 07:44:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:21,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:44:21,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:21,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878814972] [2021-11-07 07:44:21,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878814972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:21,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137147847] [2021-11-07 07:44:21,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:21,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:21,682 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:21,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:44:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:44:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:44:22,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137147847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:22,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:22,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:44:22,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040930860] [2021-11-07 07:44:22,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:44:22,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:44:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:22,015 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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) [2021-11-07 07:44:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:22,068 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-11-07 07:44:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:44:22,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 46 [2021-11-07 07:44:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:22,069 INFO L225 Difference]: With dead ends: 62 [2021-11-07 07:44:22,069 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 07:44:22,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 07:44:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 07:44:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 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) [2021-11-07 07:44:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-11-07 07:44:22,077 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2021-11-07 07:44:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:22,077 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-11-07 07:44:22,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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) [2021-11-07 07:44:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-11-07 07:44:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:44:22,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:22,079 INFO L513 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:22,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:22,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:44:22,293 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 14 times [2021-11-07 07:44:22,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:22,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262489464] [2021-11-07 07:44:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:22,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:44:22,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:22,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262489464] [2021-11-07 07:44:22,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262489464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:22,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607105323] [2021-11-07 07:44:22,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:22,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:22,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:22,502 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:22,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:44:22,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:22,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:44:22,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:44:22,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607105323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:22,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:22,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:44:22,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949199952] [2021-11-07 07:44:22,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:44:22,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:44:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:44:22,818 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2021-11-07 07:44:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:22,874 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-11-07 07:44:22,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:44:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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 48 [2021-11-07 07:44:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:22,876 INFO L225 Difference]: With dead ends: 64 [2021-11-07 07:44:22,876 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 07:44:22,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:44:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 07:44:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-07 07:44:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 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) [2021-11-07 07:44:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-11-07 07:44:22,896 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2021-11-07 07:44:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:22,897 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-11-07 07:44:22,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2021-11-07 07:44:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-11-07 07:44:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:44:22,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:22,899 INFO L513 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:22,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:23,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:44:23,105 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1185460165, now seen corresponding path program 15 times [2021-11-07 07:44:23,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:23,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259725715] [2021-11-07 07:44:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:23,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:44:23,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:23,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259725715] [2021-11-07 07:44:23,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259725715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:23,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316578121] [2021-11-07 07:44:23,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:23,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:23,364 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:23,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:44:23,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:44:23,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:44:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-07 07:44:23,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316578121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:23,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:23,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2021-11-07 07:44:23,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617005879] [2021-11-07 07:44:23,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:44:23,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:44:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:44:23,740 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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) [2021-11-07 07:44:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:23,846 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-11-07 07:44:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:44:23,846 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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 50 [2021-11-07 07:44:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:23,847 INFO L225 Difference]: With dead ends: 69 [2021-11-07 07:44:23,847 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 07:44:23,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:44:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 07:44:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-07 07:44:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 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) [2021-11-07 07:44:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-11-07 07:44:23,852 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 50 [2021-11-07 07:44:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-11-07 07:44:23,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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) [2021-11-07 07:44:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-11-07 07:44:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 07:44:23,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:23,854 INFO L513 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:23,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:24,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:24,073 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:24,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 16 times [2021-11-07 07:44:24,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:24,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091086461] [2021-11-07 07:44:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:24,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:44:24,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:24,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091086461] [2021-11-07 07:44:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091086461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:24,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98012559] [2021-11-07 07:44:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:24,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:24,306 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:24,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:44:24,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:24,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:24,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:44:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:44:24,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98012559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:24,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:24,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 07:44:24,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803368695] [2021-11-07 07:44:24,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:44:24,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:44:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:44:24,630 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2021-11-07 07:44:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:24,682 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-11-07 07:44:24,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:44:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 54 [2021-11-07 07:44:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:24,683 INFO L225 Difference]: With dead ends: 72 [2021-11-07 07:44:24,684 INFO L226 Difference]: Without dead ends: 57 [2021-11-07 07:44:24,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:44:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-07 07:44:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-07 07:44:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 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) [2021-11-07 07:44:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-11-07 07:44:24,688 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2021-11-07 07:44:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:24,688 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-11-07 07:44:24,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2021-11-07 07:44:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-11-07 07:44:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:44:24,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:24,690 INFO L513 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:24,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:24,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:24,905 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 17 times [2021-11-07 07:44:24,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:24,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627726249] [2021-11-07 07:44:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:24,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:44:25,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:25,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627726249] [2021-11-07 07:44:25,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627726249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:25,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498242683] [2021-11-07 07:44:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:25,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:25,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:25,189 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:25,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:44:25,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-07 07:44:25,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:25,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:44:25,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:44:25,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498242683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:25,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:25,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 07:44:25,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005486202] [2021-11-07 07:44:25,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:44:25,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:44:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:44:25,546 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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) [2021-11-07 07:44:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:25,598 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-11-07 07:44:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:44:25,598 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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 56 [2021-11-07 07:44:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:25,599 INFO L225 Difference]: With dead ends: 74 [2021-11-07 07:44:25,599 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 07:44:25,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:44:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 07:44:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-07 07:44:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 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) [2021-11-07 07:44:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-11-07 07:44:25,604 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2021-11-07 07:44:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:25,605 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-11-07 07:44:25,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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) [2021-11-07 07:44:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-11-07 07:44:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:44:25,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:25,606 INFO L513 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:25,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:25,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:25,825 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash -575792311, now seen corresponding path program 18 times [2021-11-07 07:44:25,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:25,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178927956] [2021-11-07 07:44:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:25,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:44:26,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178927956] [2021-11-07 07:44:26,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178927956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204610308] [2021-11-07 07:44:26,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:26,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:26,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:26,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:44:26,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-07 07:44:26,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:44:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-07 07:44:26,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204610308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:26,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:26,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2021-11-07 07:44:26,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891158393] [2021-11-07 07:44:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:44:26,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:44:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:44:26,587 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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) [2021-11-07 07:44:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:26,695 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-11-07 07:44:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:44:26,695 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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 58 [2021-11-07 07:44:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:26,696 INFO L225 Difference]: With dead ends: 79 [2021-11-07 07:44:26,696 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:44:26,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:44:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:44:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-07 07:44:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 states have internal predecessors, (69), 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) [2021-11-07 07:44:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-11-07 07:44:26,700 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 58 [2021-11-07 07:44:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:26,700 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-11-07 07:44:26,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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) [2021-11-07 07:44:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-11-07 07:44:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:44:26,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:26,701 INFO L513 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:26,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:26,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:26,913 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 19 times [2021-11-07 07:44:26,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:26,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238585813] [2021-11-07 07:44:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:26,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:44:27,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:27,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238585813] [2021-11-07 07:44:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238585813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:27,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750466134] [2021-11-07 07:44:27,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:27,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:27,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:27,215 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:27,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:44:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:27,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:44:27,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:44:27,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750466134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:27,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:27,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-07 07:44:27,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687679758] [2021-11-07 07:44:27,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:44:27,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:44:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:44:27,671 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 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) [2021-11-07 07:44:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:27,732 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-07 07:44:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:44:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 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 62 [2021-11-07 07:44:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:27,733 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:44:27,733 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 07:44:27,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:44:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 07:44:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-07 07:44:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 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) [2021-11-07 07:44:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-11-07 07:44:27,738 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 62 [2021-11-07 07:44:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:27,739 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-11-07 07:44:27,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 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) [2021-11-07 07:44:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-11-07 07:44:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:44:27,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:27,740 INFO L513 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:27,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:27,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:44:27,965 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 20 times [2021-11-07 07:44:27,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:27,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946311895] [2021-11-07 07:44:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:27,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:44:28,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:28,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946311895] [2021-11-07 07:44:28,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946311895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:28,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479368251] [2021-11-07 07:44:28,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:28,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:28,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:28,300 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:28,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:44:28,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:44:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:44:28,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479368251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:28,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:28,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-07 07:44:28,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645700416] [2021-11-07 07:44:28,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:44:28,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:44:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:44:28,704 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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) [2021-11-07 07:44:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:28,759 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-11-07 07:44:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:44:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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 64 [2021-11-07 07:44:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:28,761 INFO L225 Difference]: With dead ends: 84 [2021-11-07 07:44:28,761 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 07:44:28,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:44:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 07:44:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-07 07:44:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 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) [2021-11-07 07:44:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-11-07 07:44:28,765 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2021-11-07 07:44:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:28,766 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-11-07 07:44:28,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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) [2021-11-07 07:44:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-11-07 07:44:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:44:28,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:28,767 INFO L513 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:28,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:28,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:28,989 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1179443671, now seen corresponding path program 21 times [2021-11-07 07:44:28,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:28,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608691221] [2021-11-07 07:44:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:28,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:44:29,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:29,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608691221] [2021-11-07 07:44:29,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608691221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:29,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450694678] [2021-11-07 07:44:29,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:29,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:29,299 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:29,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:44:29,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-07 07:44:29,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:44:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-07 07:44:29,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450694678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:29,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:29,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2021-11-07 07:44:29,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110360730] [2021-11-07 07:44:29,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:44:29,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:44:29,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:44:29,883 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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) [2021-11-07 07:44:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:30,017 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-11-07 07:44:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:44:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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 [2021-11-07 07:44:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:30,019 INFO L225 Difference]: With dead ends: 89 [2021-11-07 07:44:30,019 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:44:30,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:44:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:44:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-07 07:44:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 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) [2021-11-07 07:44:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-11-07 07:44:30,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 66 [2021-11-07 07:44:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:30,027 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-11-07 07:44:30,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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) [2021-11-07 07:44:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-11-07 07:44:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:44:30,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:30,029 INFO L513 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:30,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:30,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:44:30,249 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 22 times [2021-11-07 07:44:30,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:30,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438743190] [2021-11-07 07:44:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:30,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:44:30,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:30,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438743190] [2021-11-07 07:44:30,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438743190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:30,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517609602] [2021-11-07 07:44:30,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:30,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:30,579 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:30,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:44:30,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:30,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:44:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:44:31,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517609602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:31,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:31,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-07 07:44:31,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470432546] [2021-11-07 07:44:31,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:44:31,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:44:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:44:31,071 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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) [2021-11-07 07:44:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:31,132 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-11-07 07:44:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:44:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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 [2021-11-07 07:44:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:31,134 INFO L225 Difference]: With dead ends: 92 [2021-11-07 07:44:31,134 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 07:44:31,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:44:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 07:44:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-07 07:44:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 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) [2021-11-07 07:44:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-11-07 07:44:31,139 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 70 [2021-11-07 07:44:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:31,139 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-11-07 07:44:31,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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) [2021-11-07 07:44:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-11-07 07:44:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 07:44:31,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:31,149 INFO L513 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:31,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:31,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:44:31,361 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 23 times [2021-11-07 07:44:31,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:31,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126243918] [2021-11-07 07:44:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:31,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:44:31,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:31,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126243918] [2021-11-07 07:44:31,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126243918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:31,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330273805] [2021-11-07 07:44:31,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:31,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:31,734 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:31,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:44:32,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-11-07 07:44:32,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:32,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:44:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:44:32,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330273805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:32,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:32,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 07:44:32,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407894616] [2021-11-07 07:44:32,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:44:32,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:44:32,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:44:32,295 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 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) [2021-11-07 07:44:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:32,385 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-11-07 07:44:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:44:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 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 72 [2021-11-07 07:44:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:32,386 INFO L225 Difference]: With dead ends: 94 [2021-11-07 07:44:32,386 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 07:44:32,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:44:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 07:44:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-07 07:44:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 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) [2021-11-07 07:44:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-07 07:44:32,397 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2021-11-07 07:44:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:32,398 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-07 07:44:32,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 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) [2021-11-07 07:44:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-07 07:44:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 07:44:32,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:32,399 INFO L513 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:32,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-07 07:44:32,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:44:32,621 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:32,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1772864485, now seen corresponding path program 24 times [2021-11-07 07:44:32,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:32,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780988919] [2021-11-07 07:44:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:32,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:44:32,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:32,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780988919] [2021-11-07 07:44:32,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780988919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:32,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664470565] [2021-11-07 07:44:32,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:32,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:32,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:32,994 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:32,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:44:33,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 07:44:33,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:44:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-11-07 07:44:33,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664470565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:33,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:33,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2021-11-07 07:44:33,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188159320] [2021-11-07 07:44:33,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:44:33,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:44:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:44:33,698 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 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) [2021-11-07 07:44:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:33,841 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-11-07 07:44:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:44:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 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 [2021-11-07 07:44:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:33,842 INFO L225 Difference]: With dead ends: 99 [2021-11-07 07:44:33,842 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 07:44:33,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:44:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 07:44:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-07 07:44:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 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) [2021-11-07 07:44:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-11-07 07:44:33,845 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 74 [2021-11-07 07:44:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:33,845 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-11-07 07:44:33,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 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) [2021-11-07 07:44:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-11-07 07:44:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 07:44:33,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:33,846 INFO L513 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:33,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:34,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:44:34,060 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 25 times [2021-11-07 07:44:34,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:34,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729674800] [2021-11-07 07:44:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:34,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:44:34,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:34,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729674800] [2021-11-07 07:44:34,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729674800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:34,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28586646] [2021-11-07 07:44:34,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:34,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:34,462 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:34,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:44:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:44:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:44:35,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28586646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:35,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:35,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-07 07:44:35,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296865957] [2021-11-07 07:44:35,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:44:35,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:44:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:44:35,092 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 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) [2021-11-07 07:44:35,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:35,173 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-11-07 07:44:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:44:35,174 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 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 78 [2021-11-07 07:44:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:35,175 INFO L225 Difference]: With dead ends: 102 [2021-11-07 07:44:35,175 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 07:44:35,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:44:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 07:44:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-07 07:44:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1125) internal successors, (89), 80 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) [2021-11-07 07:44:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-11-07 07:44:35,182 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 78 [2021-11-07 07:44:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:35,182 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-11-07 07:44:35,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 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) [2021-11-07 07:44:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-11-07 07:44:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:44:35,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:35,183 INFO L513 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:35,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:35,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:44:35,397 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:35,398 INFO L85 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 26 times [2021-11-07 07:44:35,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:35,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667415664] [2021-11-07 07:44:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:35,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:44:35,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:35,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667415664] [2021-11-07 07:44:35,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667415664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:35,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555857524] [2021-11-07 07:44:35,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:35,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:35,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:35,851 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:44:36,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:36,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:44:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:44:36,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555857524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:36,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:36,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-07 07:44:36,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296409076] [2021-11-07 07:44:36,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 07:44:36,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 07:44:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:44:36,563 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 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) [2021-11-07 07:44:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:36,640 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-11-07 07:44:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:44:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 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) Word has length 80 [2021-11-07 07:44:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:36,646 INFO L225 Difference]: With dead ends: 104 [2021-11-07 07:44:36,646 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 07:44:36,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:44:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 07:44:36,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-07 07:44:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 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) [2021-11-07 07:44:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-07 07:44:36,651 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 80 [2021-11-07 07:44:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:36,651 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-07 07:44:36,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 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) [2021-11-07 07:44:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-07 07:44:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 07:44:36,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:36,652 INFO L513 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:36,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:36,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:36,853 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1740300659, now seen corresponding path program 27 times [2021-11-07 07:44:36,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:36,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580841210] [2021-11-07 07:44:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:36,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:44:37,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:37,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580841210] [2021-11-07 07:44:37,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580841210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:37,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344101259] [2021-11-07 07:44:37,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:37,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:37,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:37,338 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:37,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:44:37,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 07:44:37,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:44:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-07 07:44:38,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344101259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:38,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:38,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2021-11-07 07:44:38,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42092885] [2021-11-07 07:44:38,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:44:38,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:44:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:44:38,303 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 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) [2021-11-07 07:44:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:38,464 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-11-07 07:44:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:44:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 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 82 [2021-11-07 07:44:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:38,467 INFO L225 Difference]: With dead ends: 109 [2021-11-07 07:44:38,467 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:44:38,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:44:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:44:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-07 07:44:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 86 states have internal predecessors, (96), 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) [2021-11-07 07:44:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-11-07 07:44:38,473 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 82 [2021-11-07 07:44:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:38,473 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-11-07 07:44:38,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 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) [2021-11-07 07:44:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-11-07 07:44:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 07:44:38,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:38,475 INFO L513 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:38,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:38,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 07:44:38,701 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 28 times [2021-11-07 07:44:38,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:38,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368793789] [2021-11-07 07:44:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:38,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:44:39,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:39,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368793789] [2021-11-07 07:44:39,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368793789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:39,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886137956] [2021-11-07 07:44:39,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:39,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:39,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:39,290 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:39,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:44:39,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:39,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:44:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:44:39,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886137956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:39,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:39,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-07 07:44:39,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286290646] [2021-11-07 07:44:39,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:44:39,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:44:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:44:39,999 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2021-11-07 07:44:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:40,078 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-11-07 07:44:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:44:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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 86 [2021-11-07 07:44:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:40,079 INFO L225 Difference]: With dead ends: 112 [2021-11-07 07:44:40,079 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 07:44:40,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:44:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 07:44:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-07 07:44:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 88 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) [2021-11-07 07:44:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-11-07 07:44:40,084 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 86 [2021-11-07 07:44:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:40,084 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-11-07 07:44:40,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2021-11-07 07:44:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-11-07 07:44:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 07:44:40,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:40,085 INFO L513 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:40,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:40,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:40,293 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 29 times [2021-11-07 07:44:40,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:40,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007388921] [2021-11-07 07:44:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:40,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:44:40,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:40,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007388921] [2021-11-07 07:44:40,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007388921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:40,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85914317] [2021-11-07 07:44:40,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:40,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:40,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:40,802 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:40,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:44:41,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-07 07:44:41,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:44:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:44:41,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85914317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:41,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:41,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 07:44:41,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761305290] [2021-11-07 07:44:41,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:44:41,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:44:41,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:44:41,536 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 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) [2021-11-07 07:44:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:41,622 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-11-07 07:44:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:44:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 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 88 [2021-11-07 07:44:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:41,623 INFO L225 Difference]: With dead ends: 114 [2021-11-07 07:44:41,624 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 07:44:41,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:44:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 07:44:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-07 07:44:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 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) [2021-11-07 07:44:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-11-07 07:44:41,628 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 88 [2021-11-07 07:44:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-11-07 07:44:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 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) [2021-11-07 07:44:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-11-07 07:44:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 07:44:41,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:41,630 INFO L513 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:41,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:41,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:41,841 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1948099967, now seen corresponding path program 30 times [2021-11-07 07:44:41,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:41,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858998494] [2021-11-07 07:44:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:41,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:44:42,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:42,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858998494] [2021-11-07 07:44:42,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858998494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:42,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949082888] [2021-11-07 07:44:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:42,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:42,350 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:42,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:44:42,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-11-07 07:44:42,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:42,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:44:42,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-11-07 07:44:43,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949082888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:43,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:43,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2021-11-07 07:44:43,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459986154] [2021-11-07 07:44:43,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 07:44:43,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 07:44:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:44:43,251 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2021-11-07 07:44:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:43,433 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2021-11-07 07:44:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:44:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) Word has length 90 [2021-11-07 07:44:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:43,434 INFO L225 Difference]: With dead ends: 119 [2021-11-07 07:44:43,434 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:44:43,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:44:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:44:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-07 07:44:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 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) [2021-11-07 07:44:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-11-07 07:44:43,439 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 90 [2021-11-07 07:44:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:43,439 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-11-07 07:44:43,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2021-11-07 07:44:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-11-07 07:44:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 07:44:43,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:43,440 INFO L513 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:43,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 07:44:43,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 07:44:43,645 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:43,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 31 times [2021-11-07 07:44:43,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:43,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420467006] [2021-11-07 07:44:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:43,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:44:44,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:44,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420467006] [2021-11-07 07:44:44,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420467006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:44,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330687400] [2021-11-07 07:44:44,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:44,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:44,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:44,146 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:44,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:44:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:44:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:44:44,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330687400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:44,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:44,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-07 07:44:44,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862703279] [2021-11-07 07:44:44,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:44:44,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:44:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:44:44,923 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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) [2021-11-07 07:44:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:45,018 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-11-07 07:44:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:44:45,019 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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 94 [2021-11-07 07:44:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:45,020 INFO L225 Difference]: With dead ends: 122 [2021-11-07 07:44:45,020 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 07:44:45,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:44:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 07:44:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-07 07:44:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 96 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) [2021-11-07 07:44:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-11-07 07:44:45,027 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 94 [2021-11-07 07:44:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:45,027 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-11-07 07:44:45,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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) [2021-11-07 07:44:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-11-07 07:44:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 07:44:45,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:45,028 INFO L513 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:45,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:45,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 07:44:45,253 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 32 times [2021-11-07 07:44:45,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:45,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695543848] [2021-11-07 07:44:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:45,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:44:45,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:45,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695543848] [2021-11-07 07:44:45,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695543848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:45,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761647574] [2021-11-07 07:44:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:45,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:45,795 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:45,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:44:46,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:46,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:44:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:44:46,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761647574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:46,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:46,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-07 07:44:46,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571850619] [2021-11-07 07:44:46,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:44:46,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:44:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:44:46,560 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 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) [2021-11-07 07:44:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:46,634 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-07 07:44:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:44:46,634 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 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 96 [2021-11-07 07:44:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:46,635 INFO L225 Difference]: With dead ends: 124 [2021-11-07 07:44:46,635 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 07:44:46,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:44:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 07:44:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-07 07:44:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 states have internal predecessors, (109), 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) [2021-11-07 07:44:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-11-07 07:44:46,640 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 96 [2021-11-07 07:44:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:46,641 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-11-07 07:44:46,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 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) [2021-11-07 07:44:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-11-07 07:44:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:44:46,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:46,642 INFO L513 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:46,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:46,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:44:46,849 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1325551375, now seen corresponding path program 33 times [2021-11-07 07:44:46,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:46,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102886215] [2021-11-07 07:44:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:46,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:44:47,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:47,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102886215] [2021-11-07 07:44:47,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102886215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:47,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244071564] [2021-11-07 07:44:47,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:47,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:47,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:47,528 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:47,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:44:48,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:44:48,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:44:48,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-11-07 07:44:48,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244071564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:48,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2021-11-07 07:44:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612952961] [2021-11-07 07:44:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 07:44:48,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 07:44:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:44:48,715 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 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) [2021-11-07 07:44:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:48,896 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-11-07 07:44:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:44:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 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 98 [2021-11-07 07:44:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:48,897 INFO L225 Difference]: With dead ends: 129 [2021-11-07 07:44:48,897 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 07:44:48,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:44:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 07:44:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-11-07 07:44:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 102 states have internal predecessors, (114), 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) [2021-11-07 07:44:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-11-07 07:44:48,902 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 98 [2021-11-07 07:44:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:48,903 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-11-07 07:44:48,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 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) [2021-11-07 07:44:48,903 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-11-07 07:44:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:44:48,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:48,904 INFO L513 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:48,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:49,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:49,129 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:49,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 34 times [2021-11-07 07:44:49,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:49,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018727587] [2021-11-07 07:44:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:49,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:44:49,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:49,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018727587] [2021-11-07 07:44:49,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018727587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:49,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643575804] [2021-11-07 07:44:49,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:49,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:49,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:49,789 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:49,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:44:50,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:44:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:44:50,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643575804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:50,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:50,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-07 07:44:50,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082253458] [2021-11-07 07:44:50,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:44:50,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:50,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:44:50,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:44:50,626 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 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) [2021-11-07 07:44:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:50,726 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-11-07 07:44:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:44:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 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 102 [2021-11-07 07:44:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:50,728 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:44:50,728 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 07:44:50,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:44:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 07:44:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-07 07:44:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 104 states have internal predecessors, (116), 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) [2021-11-07 07:44:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-11-07 07:44:50,743 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 102 [2021-11-07 07:44:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:50,743 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-11-07 07:44:50,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 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) [2021-11-07 07:44:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-11-07 07:44:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:44:50,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:50,748 INFO L513 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:50,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:50,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:44:50,953 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 35 times [2021-11-07 07:44:50,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:50,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306914024] [2021-11-07 07:44:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:50,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:44:51,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:51,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306914024] [2021-11-07 07:44:51,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306914024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:51,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341156186] [2021-11-07 07:44:51,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:51,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:51,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:51,657 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:51,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:44:52,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-11-07 07:44:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:52,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:44:52,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:44:52,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341156186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:52,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:52,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 07:44:52,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939476088] [2021-11-07 07:44:52,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:44:52,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:44:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:44:52,604 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 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) [2021-11-07 07:44:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:52,688 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-11-07 07:44:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:44:52,689 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 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 104 [2021-11-07 07:44:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:52,690 INFO L225 Difference]: With dead ends: 134 [2021-11-07 07:44:52,690 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 07:44:52,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:44:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 07:44:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-07 07:44:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 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) [2021-11-07 07:44:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-11-07 07:44:52,695 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 104 [2021-11-07 07:44:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:52,695 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-11-07 07:44:52,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 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) [2021-11-07 07:44:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-11-07 07:44:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 07:44:52,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:52,696 INFO L513 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:52,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:52,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:44:52,913 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:52,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash -646783203, now seen corresponding path program 36 times [2021-11-07 07:44:52,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:52,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470482122] [2021-11-07 07:44:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:52,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:44:53,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:53,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470482122] [2021-11-07 07:44:53,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470482122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:53,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947863230] [2021-11-07 07:44:53,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:53,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:53,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:53,608 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:53,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:44:54,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-11-07 07:44:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:44:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-11-07 07:44:54,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947863230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:54,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:54,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-11-07 07:44:54,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839206253] [2021-11-07 07:44:54,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:44:54,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:54,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:44:54,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:44:54,890 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 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) [2021-11-07 07:44:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:55,030 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2021-11-07 07:44:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:44:55,031 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 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 106 [2021-11-07 07:44:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:55,031 INFO L225 Difference]: With dead ends: 139 [2021-11-07 07:44:55,031 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 07:44:55,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:44:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 07:44:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-07 07:44:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 110 states have internal predecessors, (123), 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) [2021-11-07 07:44:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2021-11-07 07:44:55,037 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 106 [2021-11-07 07:44:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:55,038 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2021-11-07 07:44:55,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 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) [2021-11-07 07:44:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2021-11-07 07:44:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 07:44:55,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:55,039 INFO L513 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:55,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:55,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:44:55,265 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:55,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 37 times [2021-11-07 07:44:55,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:55,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873363372] [2021-11-07 07:44:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:55,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:44:55,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:55,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873363372] [2021-11-07 07:44:55,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873363372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:55,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925086413] [2021-11-07 07:44:55,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:55,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:55,944 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:55,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:44:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 07:44:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:44:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925086413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:56,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:56,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-07 07:44:56,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208579965] [2021-11-07 07:44:56,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:44:56,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:44:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:44:56,926 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 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) [2021-11-07 07:44:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:57,031 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2021-11-07 07:44:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 07:44:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 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 110 [2021-11-07 07:44:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:57,033 INFO L225 Difference]: With dead ends: 142 [2021-11-07 07:44:57,033 INFO L226 Difference]: Without dead ends: 113 [2021-11-07 07:44:57,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:44:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-07 07:44:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-07 07:44:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 112 states have internal predecessors, (125), 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) [2021-11-07 07:44:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-11-07 07:44:57,038 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 110 [2021-11-07 07:44:57,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:57,039 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-11-07 07:44:57,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 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) [2021-11-07 07:44:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-11-07 07:44:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:44:57,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:57,040 INFO L513 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:57,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:57,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 07:44:57,261 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:57,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 38 times [2021-11-07 07:44:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:57,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646795197] [2021-11-07 07:44:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:57,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:44:58,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:58,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646795197] [2021-11-07 07:44:58,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646795197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:58,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585267734] [2021-11-07 07:44:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:58,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:58,014 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:58,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:44:58,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:58,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 07:44:58,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:44:59,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585267734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:59,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:59,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-07 07:44:59,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370224790] [2021-11-07 07:44:59,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 07:44:59,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 07:44:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:44:59,024 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 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) [2021-11-07 07:44:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:59,165 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-11-07 07:44:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:44:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 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 112 [2021-11-07 07:44:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:59,167 INFO L225 Difference]: With dead ends: 144 [2021-11-07 07:44:59,167 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 07:44:59,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:44:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 07:44:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-07 07:44:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 114 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) [2021-11-07 07:44:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-11-07 07:44:59,174 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2021-11-07 07:44:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:59,174 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-11-07 07:44:59,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 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) [2021-11-07 07:44:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-11-07 07:44:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 07:44:59,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:59,176 INFO L513 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:59,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:59,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:59,400 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash 84159147, now seen corresponding path program 39 times [2021-11-07 07:44:59,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:59,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18671396] [2021-11-07 07:44:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:59,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:45:00,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:00,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18671396] [2021-11-07 07:45:00,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18671396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:00,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574296423] [2021-11-07 07:45:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:00,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:00,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:00,154 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:00,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:45:00,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-07 07:45:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:00,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:45:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-11-07 07:45:01,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574296423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:01,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:01,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15] total 58 [2021-11-07 07:45:01,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111035370] [2021-11-07 07:45:01,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-07 07:45:01,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-07 07:45:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:45:01,564 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 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) [2021-11-07 07:45:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:01,743 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2021-11-07 07:45:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:45:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 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 114 [2021-11-07 07:45:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:01,744 INFO L225 Difference]: With dead ends: 149 [2021-11-07 07:45:01,745 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 07:45:01,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:45:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 07:45:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-11-07 07:45:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 states have internal predecessors, (132), 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) [2021-11-07 07:45:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-11-07 07:45:01,750 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 114 [2021-11-07 07:45:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:01,751 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-11-07 07:45:01,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 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) [2021-11-07 07:45:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-11-07 07:45:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 07:45:01,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:01,752 INFO L513 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:01,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-07 07:45:01,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 07:45:01,973 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 40 times [2021-11-07 07:45:01,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:01,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256981623] [2021-11-07 07:45:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:01,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:45:02,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:02,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256981623] [2021-11-07 07:45:02,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256981623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:02,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648279220] [2021-11-07 07:45:02,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:45:02,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:02,742 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:02,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:45:03,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:03,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:45:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:45:03,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648279220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:03,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-07 07:45:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662135700] [2021-11-07 07:45:03,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:45:03,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:45:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:45:03,885 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 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) [2021-11-07 07:45:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:03,979 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2021-11-07 07:45:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:45:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 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) Word has length 118 [2021-11-07 07:45:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:03,981 INFO L225 Difference]: With dead ends: 152 [2021-11-07 07:45:03,982 INFO L226 Difference]: Without dead ends: 121 [2021-11-07 07:45:03,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:45:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-07 07:45:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-07 07:45:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 120 states have internal predecessors, (134), 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) [2021-11-07 07:45:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-11-07 07:45:03,988 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 118 [2021-11-07 07:45:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:03,989 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-11-07 07:45:03,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 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) [2021-11-07 07:45:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-11-07 07:45:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 07:45:03,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:03,991 INFO L513 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:04,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:04,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 07:45:04,209 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:04,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:04,210 INFO L85 PathProgramCache]: Analyzing trace with hash -411073194, now seen corresponding path program 41 times [2021-11-07 07:45:04,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:04,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813006705] [2021-11-07 07:45:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:04,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:45:05,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:05,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813006705] [2021-11-07 07:45:05,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813006705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:05,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598629622] [2021-11-07 07:45:05,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:05,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:05,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:05,097 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:05,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:45:05,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-11-07 07:45:05,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:05,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 07:45:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:45:06,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598629622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:06,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:06,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-07 07:45:06,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632270861] [2021-11-07 07:45:06,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 07:45:06,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:06,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 07:45:06,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:45:06,191 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 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) [2021-11-07 07:45:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:06,316 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2021-11-07 07:45:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:45:06,316 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 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 120 [2021-11-07 07:45:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:06,322 INFO L225 Difference]: With dead ends: 154 [2021-11-07 07:45:06,322 INFO L226 Difference]: Without dead ends: 123 [2021-11-07 07:45:06,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:45:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-07 07:45:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-07 07:45:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 states have internal predecessors, (136), 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) [2021-11-07 07:45:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-11-07 07:45:06,329 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 120 [2021-11-07 07:45:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:06,331 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-11-07 07:45:06,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 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) [2021-11-07 07:45:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-11-07 07:45:06,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 07:45:06,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:06,332 INFO L513 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:06,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:06,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:06,557 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash -553758279, now seen corresponding path program 42 times [2021-11-07 07:45:06,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:06,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900494761] [2021-11-07 07:45:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:06,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:45:07,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:07,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900494761] [2021-11-07 07:45:07,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900494761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:07,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558836050] [2021-11-07 07:45:07,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:07,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:07,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:07,432 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:07,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:45:08,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-11-07 07:45:08,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:45:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2021-11-07 07:45:09,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558836050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:09,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:09,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 16] total 62 [2021-11-07 07:45:09,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023921855] [2021-11-07 07:45:09,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 07:45:09,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 07:45:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:45:09,109 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 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) [2021-11-07 07:45:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:09,372 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-11-07 07:45:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 07:45:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 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 122 [2021-11-07 07:45:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:09,373 INFO L225 Difference]: With dead ends: 159 [2021-11-07 07:45:09,374 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 07:45:09,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:45:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 07:45:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-07 07:45:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.119047619047619) internal successors, (141), 126 states have internal predecessors, (141), 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) [2021-11-07 07:45:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-11-07 07:45:09,380 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 122 [2021-11-07 07:45:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:09,381 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-11-07 07:45:09,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 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) [2021-11-07 07:45:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-11-07 07:45:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 07:45:09,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:09,382 INFO L513 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:09,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:09,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:09,597 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1685652673, now seen corresponding path program 43 times [2021-11-07 07:45:09,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:09,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055222894] [2021-11-07 07:45:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:09,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:45:10,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:10,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055222894] [2021-11-07 07:45:10,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055222894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:10,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766082563] [2021-11-07 07:45:10,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:45:10,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:10,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:10,431 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:10,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:45:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:45:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:45:11,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766082563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:11,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:11,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-07 07:45:11,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880234609] [2021-11-07 07:45:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 07:45:11,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 07:45:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:45:11,669 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 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) [2021-11-07 07:45:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:11,760 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-11-07 07:45:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 07:45:11,760 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 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 126 [2021-11-07 07:45:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:11,765 INFO L225 Difference]: With dead ends: 162 [2021-11-07 07:45:11,765 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 07:45:11,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:45:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 07:45:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-07 07:45:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1171875) internal successors, (143), 128 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) [2021-11-07 07:45:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-11-07 07:45:11,769 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 126 [2021-11-07 07:45:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:11,770 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-11-07 07:45:11,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 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) [2021-11-07 07:45:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-11-07 07:45:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 07:45:11,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:11,771 INFO L513 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:11,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-07 07:45:11,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:45:11,988 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 834124516, now seen corresponding path program 44 times [2021-11-07 07:45:11,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:11,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433950205] [2021-11-07 07:45:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:11,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:45:12,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:12,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433950205] [2021-11-07 07:45:12,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433950205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:12,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091989559] [2021-11-07 07:45:12,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:12,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:12,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:12,959 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:12,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:45:13,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:45:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:45:14,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091989559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:14,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:14,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-07 07:45:14,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553843144] [2021-11-07 07:45:14,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:45:14,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:14,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:45:14,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:45:14,173 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 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) [2021-11-07 07:45:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:14,292 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2021-11-07 07:45:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:45:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 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 128 [2021-11-07 07:45:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:14,296 INFO L225 Difference]: With dead ends: 164 [2021-11-07 07:45:14,296 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 07:45:14,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:45:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 07:45:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-07 07:45:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 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) [2021-11-07 07:45:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-11-07 07:45:14,302 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 128 [2021-11-07 07:45:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:14,302 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-11-07 07:45:14,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 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) [2021-11-07 07:45:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-11-07 07:45:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 07:45:14,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:14,304 INFO L513 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:14,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:14,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 07:45:14,529 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1440648121, now seen corresponding path program 45 times [2021-11-07 07:45:14,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:14,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361538455] [2021-11-07 07:45:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:14,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:45:15,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:15,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361538455] [2021-11-07 07:45:15,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361538455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:15,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179494855] [2021-11-07 07:45:15,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:15,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:15,456 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:15,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:45:16,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-07 07:45:16,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:16,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:45:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-11-07 07:45:17,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179494855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:17,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:17,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 17] total 66 [2021-11-07 07:45:17,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386141477] [2021-11-07 07:45:17,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:45:17,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:17,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:45:17,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:45:17,196 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 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) [2021-11-07 07:45:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:17,565 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2021-11-07 07:45:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 07:45:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 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 130 [2021-11-07 07:45:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:17,567 INFO L225 Difference]: With dead ends: 169 [2021-11-07 07:45:17,567 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 07:45:17,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:45:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 07:45:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-11-07 07:45:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 134 states have internal predecessors, (150), 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) [2021-11-07 07:45:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-11-07 07:45:17,574 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 130 [2021-11-07 07:45:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:17,575 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-11-07 07:45:17,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 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) [2021-11-07 07:45:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-11-07 07:45:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 07:45:17,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:17,576 INFO L513 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:17,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:17,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 07:45:17,789 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash -83220273, now seen corresponding path program 46 times [2021-11-07 07:45:17,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:17,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747340954] [2021-11-07 07:45:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:17,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:45:18,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:18,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747340954] [2021-11-07 07:45:18,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747340954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:18,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876364914] [2021-11-07 07:45:18,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:45:18,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:18,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:18,848 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:18,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:45:19,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:19,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 07:45:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:45:20,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876364914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:20,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:20,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-07 07:45:20,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127927458] [2021-11-07 07:45:20,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 07:45:20,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 07:45:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:45:20,162 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 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) [2021-11-07 07:45:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:20,258 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2021-11-07 07:45:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 07:45:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 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) Word has length 134 [2021-11-07 07:45:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:20,259 INFO L225 Difference]: With dead ends: 172 [2021-11-07 07:45:20,260 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 07:45:20,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:45:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 07:45:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-07 07:45:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 136 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) [2021-11-07 07:45:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2021-11-07 07:45:20,266 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 134 [2021-11-07 07:45:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:20,266 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2021-11-07 07:45:20,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 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) [2021-11-07 07:45:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2021-11-07 07:45:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 07:45:20,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:20,267 INFO L513 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:20,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-07 07:45:20,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:45:20,477 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1769075726, now seen corresponding path program 47 times [2021-11-07 07:45:20,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:20,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121376200] [2021-11-07 07:45:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:20,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:45:21,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:21,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121376200] [2021-11-07 07:45:21,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121376200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:21,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810755004] [2021-11-07 07:45:21,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:21,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:21,443 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:21,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:45:22,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-11-07 07:45:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:22,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:45:22,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:45:22,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810755004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:22,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:22,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-07 07:45:22,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038467993] [2021-11-07 07:45:22,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:45:22,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:22,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:45:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:45:22,785 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 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) [2021-11-07 07:45:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:22,948 INFO L93 Difference]: Finished difference Result 174 states and 205 transitions. [2021-11-07 07:45:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 07:45:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 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 136 [2021-11-07 07:45:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:22,950 INFO L225 Difference]: With dead ends: 174 [2021-11-07 07:45:22,950 INFO L226 Difference]: Without dead ends: 139 [2021-11-07 07:45:22,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:45:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-07 07:45:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-07 07:45:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.1159420289855073) internal successors, (154), 138 states have internal predecessors, (154), 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) [2021-11-07 07:45:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2021-11-07 07:45:22,956 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 136 [2021-11-07 07:45:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:22,957 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2021-11-07 07:45:22,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 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) [2021-11-07 07:45:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2021-11-07 07:45:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 07:45:22,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:22,959 INFO L513 BasicCegarLoop]: trace histogram [66, 51, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:22,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:23,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:23,173 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:23,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1621471829, now seen corresponding path program 48 times [2021-11-07 07:45:23,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:23,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211756727] [2021-11-07 07:45:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:23,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1508 proven. 2652 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:45:24,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:24,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211756727] [2021-11-07 07:45:24,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211756727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:24,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712641548] [2021-11-07 07:45:24,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:24,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:24,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:24,335 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:24,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:45:25,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-11-07 07:45:25,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:25,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:45:25,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1581 proven. 225 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-11-07 07:45:26,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712641548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:26,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:26,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 18] total 70 [2021-11-07 07:45:26,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293447876] [2021-11-07 07:45:26,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-07 07:45:26,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-07 07:45:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:45:26,301 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 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) [2021-11-07 07:45:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:26,545 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2021-11-07 07:45:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 07:45:26,546 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 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 138 [2021-11-07 07:45:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:26,547 INFO L225 Difference]: With dead ends: 179 [2021-11-07 07:45:26,547 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 07:45:26,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:45:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 07:45:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-11-07 07:45:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.119718309859155) internal successors, (159), 142 states have internal predecessors, (159), 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) [2021-11-07 07:45:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2021-11-07 07:45:26,554 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 138 [2021-11-07 07:45:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:26,554 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2021-11-07 07:45:26,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 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) [2021-11-07 07:45:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2021-11-07 07:45:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 07:45:26,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:26,556 INFO L513 BasicCegarLoop]: trace histogram [68, 52, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:26,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:26,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:26,769 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -530151331, now seen corresponding path program 49 times [2021-11-07 07:45:26,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:26,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194335368] [2021-11-07 07:45:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:26,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:45:27,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:27,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194335368] [2021-11-07 07:45:27,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194335368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:27,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27257113] [2021-11-07 07:45:27,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:45:27,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:27,940 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:27,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:45:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 07:45:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:45:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27257113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:29,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:29,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-07 07:45:29,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509598321] [2021-11-07 07:45:29,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 07:45:29,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 07:45:29,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:45:29,360 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 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) [2021-11-07 07:45:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:29,458 INFO L93 Difference]: Finished difference Result 182 states and 215 transitions. [2021-11-07 07:45:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 07:45:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 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 142 [2021-11-07 07:45:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:29,459 INFO L225 Difference]: With dead ends: 182 [2021-11-07 07:45:29,459 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 07:45:29,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:45:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 07:45:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 07:45:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 144 states have internal predecessors, (161), 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) [2021-11-07 07:45:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2021-11-07 07:45:29,464 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 142 [2021-11-07 07:45:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:29,464 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2021-11-07 07:45:29,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 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) [2021-11-07 07:45:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2021-11-07 07:45:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 07:45:29,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:29,466 INFO L513 BasicCegarLoop]: trace histogram [69, 53, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:29,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 07:45:29,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-07 07:45:29,681 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1018337408, now seen corresponding path program 50 times [2021-11-07 07:45:29,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:29,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024902677] [2021-11-07 07:45:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:29,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:45:30,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:30,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024902677] [2021-11-07 07:45:30,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024902677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:30,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889074778] [2021-11-07 07:45:30,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:30,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:30,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:30,835 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:30,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:45:31,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 07:45:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:45:32,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889074778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:32,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:32,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-07 07:45:32,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291307772] [2021-11-07 07:45:32,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 07:45:32,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:32,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 07:45:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:45:32,317 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 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) [2021-11-07 07:45:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:32,431 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2021-11-07 07:45:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 07:45:32,432 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 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 144 [2021-11-07 07:45:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:32,432 INFO L225 Difference]: With dead ends: 184 [2021-11-07 07:45:32,432 INFO L226 Difference]: Without dead ends: 147 [2021-11-07 07:45:32,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:45:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-07 07:45:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-07 07:45:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1164383561643836) internal successors, (163), 146 states have internal predecessors, (163), 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) [2021-11-07 07:45:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2021-11-07 07:45:32,436 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 144 [2021-11-07 07:45:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:32,437 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2021-11-07 07:45:32,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 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) [2021-11-07 07:45:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2021-11-07 07:45:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 07:45:32,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:32,439 INFO L513 BasicCegarLoop]: trace histogram [70, 54, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:32,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-07 07:45:32,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:32,661 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1237636125, now seen corresponding path program 51 times [2021-11-07 07:45:32,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:32,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893456271] [2021-11-07 07:45:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:32,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1705 proven. 2970 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:45:33,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:33,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893456271] [2021-11-07 07:45:33,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893456271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:33,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125381665] [2021-11-07 07:45:33,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:33,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:33,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:33,847 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:33,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:45:35,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-07 07:45:35,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:45:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1782 proven. 256 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2021-11-07 07:45:36,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125381665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:36,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:36,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 19] total 74 [2021-11-07 07:45:36,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990933097] [2021-11-07 07:45:36,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-07 07:45:36,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-07 07:45:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:45:36,015 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 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) [2021-11-07 07:45:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:36,271 INFO L93 Difference]: Finished difference Result 189 states and 225 transitions. [2021-11-07 07:45:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 07:45:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 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 146 [2021-11-07 07:45:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:36,272 INFO L225 Difference]: With dead ends: 189 [2021-11-07 07:45:36,272 INFO L226 Difference]: Without dead ends: 152 [2021-11-07 07:45:36,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:45:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-07 07:45:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-07 07:45:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.12) internal successors, (168), 150 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) [2021-11-07 07:45:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2021-11-07 07:45:36,278 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 146 [2021-11-07 07:45:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:36,278 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2021-11-07 07:45:36,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 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) [2021-11-07 07:45:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2021-11-07 07:45:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 07:45:36,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:36,280 INFO L513 BasicCegarLoop]: trace histogram [72, 55, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:36,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:36,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:36,502 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:36,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1447672981, now seen corresponding path program 52 times [2021-11-07 07:45:36,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:36,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809010878] [2021-11-07 07:45:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:36,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:45:37,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:37,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809010878] [2021-11-07 07:45:37,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809010878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:37,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590698931] [2021-11-07 07:45:37,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:45:37,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:37,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:37,681 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:37,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:45:38,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 07:45:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:45:39,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590698931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:39,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:39,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-11-07 07:45:39,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281884528] [2021-11-07 07:45:39,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:45:39,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:45:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:45:39,225 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 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) [2021-11-07 07:45:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:39,330 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2021-11-07 07:45:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:45:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 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 150 [2021-11-07 07:45:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:39,332 INFO L225 Difference]: With dead ends: 192 [2021-11-07 07:45:39,332 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 07:45:39,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:45:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 07:45:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-07 07:45:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.118421052631579) internal successors, (170), 152 states have internal predecessors, (170), 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) [2021-11-07 07:45:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2021-11-07 07:45:39,360 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 150 [2021-11-07 07:45:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:39,360 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2021-11-07 07:45:39,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 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) [2021-11-07 07:45:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2021-11-07 07:45:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 07:45:39,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:39,361 INFO L513 BasicCegarLoop]: trace histogram [73, 56, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:39,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:39,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-07 07:45:39,562 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2041741170, now seen corresponding path program 53 times [2021-11-07 07:45:39,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:39,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728421161] [2021-11-07 07:45:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:39,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:45:40,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:40,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728421161] [2021-11-07 07:45:40,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728421161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:40,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190239874] [2021-11-07 07:45:40,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:40,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:40,758 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:40,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:45:42,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2021-11-07 07:45:42,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 07:45:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:45:42,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190239874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:42,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:42,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-07 07:45:42,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387859077] [2021-11-07 07:45:42,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 07:45:42,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 07:45:42,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:45:42,388 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 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) [2021-11-07 07:45:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:42,496 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2021-11-07 07:45:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 07:45:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 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 152 [2021-11-07 07:45:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:42,497 INFO L225 Difference]: With dead ends: 194 [2021-11-07 07:45:42,497 INFO L226 Difference]: Without dead ends: 155 [2021-11-07 07:45:42,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:45:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-07 07:45:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-07 07:45:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1168831168831168) internal successors, (172), 154 states have internal predecessors, (172), 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) [2021-11-07 07:45:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 172 transitions. [2021-11-07 07:45:42,503 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 172 transitions. Word has length 152 [2021-11-07 07:45:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:42,504 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 172 transitions. [2021-11-07 07:45:42,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 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) [2021-11-07 07:45:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 172 transitions. [2021-11-07 07:45:42,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 07:45:42,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:42,505 INFO L513 BasicCegarLoop]: trace histogram [74, 57, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:42,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:42,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 07:45:42,713 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1710620431, now seen corresponding path program 54 times [2021-11-07 07:45:42,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:42,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308210683] [2021-11-07 07:45:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:42,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1914 proven. 3306 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:45:44,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:44,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308210683] [2021-11-07 07:45:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308210683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:44,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796350684] [2021-11-07 07:45:44,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:44,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:44,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:44,166 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:44,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:45:45,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2021-11-07 07:45:45,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:45:45,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1995 proven. 289 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2021-11-07 07:45:46,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796350684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:46,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:46,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 20] total 78 [2021-11-07 07:45:46,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059955759] [2021-11-07 07:45:46,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 07:45:46,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 07:45:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:45:46,588 INFO L87 Difference]: Start difference. First operand 155 states and 172 transitions. Second operand has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 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) [2021-11-07 07:45:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:46,861 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2021-11-07 07:45:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 07:45:46,861 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 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 154 [2021-11-07 07:45:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:46,862 INFO L225 Difference]: With dead ends: 199 [2021-11-07 07:45:46,862 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 07:45:46,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:45:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 07:45:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-07 07:45:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.120253164556962) internal successors, (177), 158 states have internal predecessors, (177), 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) [2021-11-07 07:45:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2021-11-07 07:45:46,867 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 154 [2021-11-07 07:45:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:46,867 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2021-11-07 07:45:46,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 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) [2021-11-07 07:45:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2021-11-07 07:45:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 07:45:46,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:46,869 INFO L513 BasicCegarLoop]: trace histogram [76, 58, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:46,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-07 07:45:47,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:47,078 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:47,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash 697924089, now seen corresponding path program 55 times [2021-11-07 07:45:47,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:47,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320094403] [2021-11-07 07:45:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:47,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:45:48,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:48,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320094403] [2021-11-07 07:45:48,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320094403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:48,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580440666] [2021-11-07 07:45:48,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:45:48,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:48,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:48,349 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:48,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:45:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:49,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:45:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:45:50,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580440666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:50,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:50,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-11-07 07:45:50,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610375942] [2021-11-07 07:45:50,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 07:45:50,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 07:45:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:45:50,122 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 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) [2021-11-07 07:45:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:50,237 INFO L93 Difference]: Finished difference Result 202 states and 239 transitions. [2021-11-07 07:45:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 07:45:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 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) Word has length 158 [2021-11-07 07:45:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:50,239 INFO L225 Difference]: With dead ends: 202 [2021-11-07 07:45:50,239 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 07:45:50,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:45:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 07:45:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-07 07:45:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.11875) internal successors, (179), 160 states have internal predecessors, (179), 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) [2021-11-07 07:45:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 179 transitions. [2021-11-07 07:45:50,244 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 179 transitions. Word has length 158 [2021-11-07 07:45:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:50,244 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 179 transitions. [2021-11-07 07:45:50,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 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) [2021-11-07 07:45:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 179 transitions. [2021-11-07 07:45:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 07:45:50,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:50,245 INFO L513 BasicCegarLoop]: trace histogram [77, 59, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:50,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:50,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:50,446 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash 318694428, now seen corresponding path program 56 times [2021-11-07 07:45:50,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:50,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896191487] [2021-11-07 07:45:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:45:51,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:51,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896191487] [2021-11-07 07:45:51,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896191487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:51,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148761203] [2021-11-07 07:45:51,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:51,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:51,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:51,926 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:51,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 07:45:53,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:53,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 07:45:53,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:45:53,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148761203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:53,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:53,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-07 07:45:53,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018118195] [2021-11-07 07:45:53,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:45:53,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:53,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:45:53,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:45:53,703 INFO L87 Difference]: Start difference. First operand 161 states and 179 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 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) [2021-11-07 07:45:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:53,824 INFO L93 Difference]: Finished difference Result 204 states and 241 transitions. [2021-11-07 07:45:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 07:45:53,824 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 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 160 [2021-11-07 07:45:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:53,825 INFO L225 Difference]: With dead ends: 204 [2021-11-07 07:45:53,825 INFO L226 Difference]: Without dead ends: 163 [2021-11-07 07:45:53,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:45:53,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-07 07:45:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-07 07:45:53,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.117283950617284) internal successors, (181), 162 states have internal predecessors, (181), 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) [2021-11-07 07:45:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 181 transitions. [2021-11-07 07:45:53,829 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 181 transitions. Word has length 160 [2021-11-07 07:45:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:53,829 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 181 transitions. [2021-11-07 07:45:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 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) [2021-11-07 07:45:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 181 transitions. [2021-11-07 07:45:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 07:45:53,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:53,830 INFO L513 BasicCegarLoop]: trace histogram [78, 60, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:53,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:54,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 07:45:54,031 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash 951210367, now seen corresponding path program 57 times [2021-11-07 07:45:54,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:54,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268659187] [2021-11-07 07:45:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:54,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2135 proven. 3660 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:45:55,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:55,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268659187] [2021-11-07 07:45:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268659187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:55,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44528647] [2021-11-07 07:45:55,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:55,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:55,539 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:55,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 07:45:56,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-11-07 07:45:56,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:57,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:45:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2220 proven. 324 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2021-11-07 07:45:58,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44528647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:58,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:58,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 21] total 82 [2021-11-07 07:45:58,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142689280] [2021-11-07 07:45:58,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 07:45:58,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 07:45:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:45:58,167 INFO L87 Difference]: Start difference. First operand 163 states and 181 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 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) [2021-11-07 07:45:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:58,530 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2021-11-07 07:45:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 07:45:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 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 162 [2021-11-07 07:45:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:58,531 INFO L225 Difference]: With dead ends: 209 [2021-11-07 07:45:58,531 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:45:58,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:45:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:45:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-11-07 07:45:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1204819277108433) internal successors, (186), 166 states have internal predecessors, (186), 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) [2021-11-07 07:45:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 186 transitions. [2021-11-07 07:45:58,541 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 186 transitions. Word has length 162 [2021-11-07 07:45:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:58,541 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 186 transitions. [2021-11-07 07:45:58,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 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) [2021-11-07 07:45:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 186 transitions. [2021-11-07 07:45:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 07:45:58,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:58,543 INFO L513 BasicCegarLoop]: trace histogram [80, 61, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:58,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:58,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:58,756 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash -232240121, now seen corresponding path program 58 times [2021-11-07 07:45:58,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:58,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097591505] [2021-11-07 07:45:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:58,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:46:00,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:00,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097591505] [2021-11-07 07:46:00,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097591505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:00,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124233023] [2021-11-07 07:46:00,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:00,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:00,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:00,128 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:00,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 07:46:01,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:01,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 07:46:01,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:46:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124233023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:02,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:02,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-11-07 07:46:02,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57461437] [2021-11-07 07:46:02,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 07:46:02,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:02,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 07:46:02,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:46:02,007 INFO L87 Difference]: Start difference. First operand 167 states and 186 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 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) [2021-11-07 07:46:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:02,129 INFO L93 Difference]: Finished difference Result 212 states and 251 transitions. [2021-11-07 07:46:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 07:46:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 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) Word has length 166 [2021-11-07 07:46:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:02,130 INFO L225 Difference]: With dead ends: 212 [2021-11-07 07:46:02,130 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 07:46:02,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:46:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 07:46:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-07 07:46:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.119047619047619) internal successors, (188), 168 states have internal predecessors, (188), 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) [2021-11-07 07:46:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2021-11-07 07:46:02,136 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 166 [2021-11-07 07:46:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:02,137 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2021-11-07 07:46:02,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 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) [2021-11-07 07:46:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2021-11-07 07:46:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 07:46:02,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:02,138 INFO L513 BasicCegarLoop]: trace histogram [81, 62, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:02,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:02,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:02,359 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1105126186, now seen corresponding path program 59 times [2021-11-07 07:46:02,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:02,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159571459] [2021-11-07 07:46:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:02,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:46:03,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:03,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159571459] [2021-11-07 07:46:03,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159571459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:03,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696196405] [2021-11-07 07:46:03,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:46:03,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:03,801 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:03,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 07:46:05,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2021-11-07 07:46:05,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:46:05,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:46:05,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696196405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:05,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:05,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-07 07:46:05,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045546500] [2021-11-07 07:46:05,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:46:05,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:46:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:46:05,750 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 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) [2021-11-07 07:46:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:05,875 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2021-11-07 07:46:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 07:46:05,875 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 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 168 [2021-11-07 07:46:05,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:05,876 INFO L225 Difference]: With dead ends: 214 [2021-11-07 07:46:05,876 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 07:46:05,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:46:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 07:46:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-07 07:46:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1176470588235294) internal successors, (190), 170 states have internal predecessors, (190), 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) [2021-11-07 07:46:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2021-11-07 07:46:05,882 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 168 [2021-11-07 07:46:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:05,882 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2021-11-07 07:46:05,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 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) [2021-11-07 07:46:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2021-11-07 07:46:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 07:46:05,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:05,884 INFO L513 BasicCegarLoop]: trace histogram [82, 63, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:05,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-07 07:46:06,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-07 07:46:06,097 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:06,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2118925709, now seen corresponding path program 60 times [2021-11-07 07:46:06,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:06,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937693610] [2021-11-07 07:46:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:06,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2368 proven. 4032 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:46:07,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:07,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937693610] [2021-11-07 07:46:07,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937693610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:07,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665156734] [2021-11-07 07:46:07,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:46:07,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:07,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:07,602 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:07,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 07:46:09,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-11-07 07:46:09,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:46:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 361 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2021-11-07 07:46:10,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665156734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:10,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:10,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 22] total 86 [2021-11-07 07:46:10,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627351514] [2021-11-07 07:46:10,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 07:46:10,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 07:46:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:46:10,556 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 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) [2021-11-07 07:46:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:10,950 INFO L93 Difference]: Finished difference Result 219 states and 261 transitions. [2021-11-07 07:46:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 07:46:10,951 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 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 170 [2021-11-07 07:46:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:10,952 INFO L225 Difference]: With dead ends: 219 [2021-11-07 07:46:10,952 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 07:46:10,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:46:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 07:46:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-07 07:46:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 174 states have internal predecessors, (195), 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) [2021-11-07 07:46:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-11-07 07:46:10,958 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 170 [2021-11-07 07:46:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:10,959 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-11-07 07:46:10,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 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) [2021-11-07 07:46:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-11-07 07:46:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 07:46:10,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:10,960 INFO L513 BasicCegarLoop]: trace histogram [84, 64, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:11,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:11,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:11,177 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1458755989, now seen corresponding path program 61 times [2021-11-07 07:46:11,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:11,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497099364] [2021-11-07 07:46:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:11,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:46:12,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:12,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497099364] [2021-11-07 07:46:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497099364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:12,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121585127] [2021-11-07 07:46:12,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:46:12,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:12,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:12,677 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:12,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 07:46:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:14,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 07:46:14,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:46:14,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121585127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:14,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:14,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-11-07 07:46:14,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344413069] [2021-11-07 07:46:14,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 07:46:14,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 07:46:14,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 07:46:14,698 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 68 states have internal predecessors, (141), 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) [2021-11-07 07:46:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:14,824 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2021-11-07 07:46:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 07:46:14,824 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 68 states have internal predecessors, (141), 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 174 [2021-11-07 07:46:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:14,825 INFO L225 Difference]: With dead ends: 222 [2021-11-07 07:46:14,825 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 07:46:14,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 07:46:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 07:46:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-07 07:46:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1193181818181819) internal successors, (197), 176 states have internal predecessors, (197), 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) [2021-11-07 07:46:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 197 transitions. [2021-11-07 07:46:14,830 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 197 transitions. Word has length 174 [2021-11-07 07:46:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:14,830 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 197 transitions. [2021-11-07 07:46:14,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 68 states have internal predecessors, (141), 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) [2021-11-07 07:46:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 197 transitions. [2021-11-07 07:46:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-07 07:46:14,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:14,831 INFO L513 BasicCegarLoop]: trace histogram [85, 65, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:14,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-07 07:46:15,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-07 07:46:15,032 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 863870392, now seen corresponding path program 62 times [2021-11-07 07:46:15,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:15,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704172104] [2021-11-07 07:46:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:15,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:46:16,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:16,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704172104] [2021-11-07 07:46:16,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704172104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:16,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373097951] [2021-11-07 07:46:16,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:46:16,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:16,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:16,654 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 07:46:18,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:46:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 07:46:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:46:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373097951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:18,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:18,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-07 07:46:18,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834435744] [2021-11-07 07:46:18,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 07:46:18,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:18,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 07:46:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:46:18,792 INFO L87 Difference]: Start difference. First operand 177 states and 197 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 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) [2021-11-07 07:46:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:18,920 INFO L93 Difference]: Finished difference Result 224 states and 265 transitions. [2021-11-07 07:46:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 07:46:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 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 176 [2021-11-07 07:46:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:18,921 INFO L225 Difference]: With dead ends: 224 [2021-11-07 07:46:18,922 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 07:46:18,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:46:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 07:46:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-11-07 07:46:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.1179775280898876) internal successors, (199), 178 states have internal predecessors, (199), 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) [2021-11-07 07:46:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 199 transitions. [2021-11-07 07:46:18,925 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 199 transitions. Word has length 176 [2021-11-07 07:46:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:18,926 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 199 transitions. [2021-11-07 07:46:18,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 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) [2021-11-07 07:46:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 199 transitions. [2021-11-07 07:46:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-07 07:46:18,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:18,927 INFO L513 BasicCegarLoop]: trace histogram [86, 66, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:18,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-07 07:46:19,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 07:46:19,127 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash 409462043, now seen corresponding path program 63 times [2021-11-07 07:46:19,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:19,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345179623] [2021-11-07 07:46:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:19,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2613 proven. 4422 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:46:20,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:20,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345179623] [2021-11-07 07:46:20,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345179623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:20,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846132927] [2021-11-07 07:46:20,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:46:20,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:20,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:20,773 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:20,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 07:46:22,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-07 07:46:22,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:46:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2706 proven. 400 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2021-11-07 07:46:23,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846132927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:23,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:23,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 23] total 90 [2021-11-07 07:46:23,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533313076] [2021-11-07 07:46:23,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-07 07:46:23,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-07 07:46:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:46:23,951 INFO L87 Difference]: Start difference. First operand 179 states and 199 transitions. Second operand has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 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) [2021-11-07 07:46:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:24,337 INFO L93 Difference]: Finished difference Result 229 states and 273 transitions. [2021-11-07 07:46:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 07:46:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 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 178 [2021-11-07 07:46:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:24,339 INFO L225 Difference]: With dead ends: 229 [2021-11-07 07:46:24,339 INFO L226 Difference]: Without dead ends: 184 [2021-11-07 07:46:24,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:46:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-07 07:46:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-11-07 07:46:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.120879120879121) internal successors, (204), 182 states have internal predecessors, (204), 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) [2021-11-07 07:46:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2021-11-07 07:46:24,343 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 178 [2021-11-07 07:46:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:24,343 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2021-11-07 07:46:24,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 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) [2021-11-07 07:46:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2021-11-07 07:46:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 07:46:24,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:24,344 INFO L513 BasicCegarLoop]: trace histogram [88, 67, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:24,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:24,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:24,545 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -285130077, now seen corresponding path program 64 times [2021-11-07 07:46:24,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:24,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556828060] [2021-11-07 07:46:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:24,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:46:26,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:26,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556828060] [2021-11-07 07:46:26,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556828060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:26,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782454756] [2021-11-07 07:46:26,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:26,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:26,193 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:26,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 07:46:27,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:27,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-07 07:46:27,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:46:28,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782454756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:28,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:28,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-11-07 07:46:28,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415935825] [2021-11-07 07:46:28,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 07:46:28,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 07:46:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:46:28,392 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 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) [2021-11-07 07:46:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:28,533 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2021-11-07 07:46:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 07:46:28,533 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 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 182 [2021-11-07 07:46:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:28,534 INFO L225 Difference]: With dead ends: 232 [2021-11-07 07:46:28,534 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 07:46:28,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:46:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 07:46:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-07 07:46:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1195652173913044) internal successors, (206), 184 states have internal predecessors, (206), 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) [2021-11-07 07:46:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 206 transitions. [2021-11-07 07:46:28,538 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 206 transitions. Word has length 182 [2021-11-07 07:46:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:28,538 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 206 transitions. [2021-11-07 07:46:28,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 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) [2021-11-07 07:46:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 206 transitions. [2021-11-07 07:46:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 07:46:28,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:28,540 INFO L513 BasicCegarLoop]: trace histogram [89, 68, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:28,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-07 07:46:28,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:28,745 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1273181126, now seen corresponding path program 65 times [2021-11-07 07:46:28,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:28,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955060732] [2021-11-07 07:46:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:28,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:46:30,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:30,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955060732] [2021-11-07 07:46:30,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955060732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:30,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077791602] [2021-11-07 07:46:30,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:46:30,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:30,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:30,556 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:30,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 07:46:32,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-11-07 07:46:32,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 07:46:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:46:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077791602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:32,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:32,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-07 07:46:32,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771953247] [2021-11-07 07:46:32,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 07:46:32,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 07:46:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:46:32,913 INFO L87 Difference]: Start difference. First operand 185 states and 206 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 72 states have internal predecessors, (149), 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) [2021-11-07 07:46:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:33,053 INFO L93 Difference]: Finished difference Result 234 states and 277 transitions. [2021-11-07 07:46:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 07:46:33,054 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 72 states have internal predecessors, (149), 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 184 [2021-11-07 07:46:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:33,055 INFO L225 Difference]: With dead ends: 234 [2021-11-07 07:46:33,055 INFO L226 Difference]: Without dead ends: 187 [2021-11-07 07:46:33,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:46:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-07 07:46:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-11-07 07:46:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.118279569892473) internal successors, (208), 186 states have internal predecessors, (208), 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) [2021-11-07 07:46:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 208 transitions. [2021-11-07 07:46:33,060 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 208 transitions. Word has length 184 [2021-11-07 07:46:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:33,061 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 208 transitions. [2021-11-07 07:46:33,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 72 states have internal predecessors, (149), 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) [2021-11-07 07:46:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 208 transitions. [2021-11-07 07:46:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 07:46:33,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:33,062 INFO L513 BasicCegarLoop]: trace histogram [90, 69, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:33,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-07 07:46:33,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 07:46:33,277 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:33,278 INFO L85 PathProgramCache]: Analyzing trace with hash -133339095, now seen corresponding path program 66 times [2021-11-07 07:46:33,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:33,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213455265] [2021-11-07 07:46:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:33,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2870 proven. 4830 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:46:35,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213455265] [2021-11-07 07:46:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213455265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095733353] [2021-11-07 07:46:35,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:46:35,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:35,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:35,021 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:35,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 07:46:36,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-11-07 07:46:36,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:36,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:46:37,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2967 proven. 441 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2021-11-07 07:46:38,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095733353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:38,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:38,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 24] total 94 [2021-11-07 07:46:38,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342126342] [2021-11-07 07:46:38,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-07 07:46:38,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-07 07:46:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 07:46:38,605 INFO L87 Difference]: Start difference. First operand 187 states and 208 transitions. Second operand has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 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) [2021-11-07 07:46:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:39,048 INFO L93 Difference]: Finished difference Result 239 states and 285 transitions. [2021-11-07 07:46:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 07:46:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 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 186 [2021-11-07 07:46:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:39,050 INFO L225 Difference]: With dead ends: 239 [2021-11-07 07:46:39,050 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 07:46:39,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 07:46:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 07:46:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-07 07:46:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1210526315789473) internal successors, (213), 190 states have internal predecessors, (213), 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) [2021-11-07 07:46:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 213 transitions. [2021-11-07 07:46:39,055 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 213 transitions. Word has length 186 [2021-11-07 07:46:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:39,055 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 213 transitions. [2021-11-07 07:46:39,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 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) [2021-11-07 07:46:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 213 transitions. [2021-11-07 07:46:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 07:46:39,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:39,057 INFO L513 BasicCegarLoop]: trace histogram [92, 70, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:39,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-07 07:46:39,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-07 07:46:39,271 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:39,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1764513999, now seen corresponding path program 67 times [2021-11-07 07:46:39,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:39,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340242247] [2021-11-07 07:46:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:39,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:46:41,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:41,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340242247] [2021-11-07 07:46:41,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340242247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:41,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891018432] [2021-11-07 07:46:41,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:46:41,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:41,108 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:41,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 07:46:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:46:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:46:43,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891018432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:43,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:43,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-11-07 07:46:43,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993073131] [2021-11-07 07:46:43,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-07 07:46:43,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-07 07:46:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:46:43,452 INFO L87 Difference]: Start difference. First operand 191 states and 213 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 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) [2021-11-07 07:46:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:43,603 INFO L93 Difference]: Finished difference Result 242 states and 287 transitions. [2021-11-07 07:46:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 07:46:43,603 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 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 190 [2021-11-07 07:46:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:43,604 INFO L225 Difference]: With dead ends: 242 [2021-11-07 07:46:43,604 INFO L226 Difference]: Without dead ends: 193 [2021-11-07 07:46:43,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:46:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-07 07:46:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-07 07:46:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1197916666666667) internal successors, (215), 192 states have internal predecessors, (215), 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) [2021-11-07 07:46:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 215 transitions. [2021-11-07 07:46:43,609 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 215 transitions. Word has length 190 [2021-11-07 07:46:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:43,609 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 215 transitions. [2021-11-07 07:46:43,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 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) [2021-11-07 07:46:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 215 transitions. [2021-11-07 07:46:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 07:46:43,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:43,610 INFO L513 BasicCegarLoop]: trace histogram [93, 71, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:43,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:43,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:43,811 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash 881837396, now seen corresponding path program 68 times [2021-11-07 07:46:43,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:43,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462544219] [2021-11-07 07:46:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:43,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:46:45,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:45,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462544219] [2021-11-07 07:46:45,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462544219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:45,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133531471] [2021-11-07 07:46:45,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:46:45,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:45,599 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:45,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 07:46:47,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:46:47,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:47,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 07:46:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:46:48,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133531471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:48,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:48,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-11-07 07:46:48,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095273654] [2021-11-07 07:46:48,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 07:46:48,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 07:46:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:46:48,095 INFO L87 Difference]: Start difference. First operand 193 states and 215 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 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) [2021-11-07 07:46:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:48,256 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2021-11-07 07:46:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 07:46:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 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 192 [2021-11-07 07:46:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:48,258 INFO L225 Difference]: With dead ends: 244 [2021-11-07 07:46:48,258 INFO L226 Difference]: Without dead ends: 195 [2021-11-07 07:46:48,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:46:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-07 07:46:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-07 07:46:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1185567010309279) internal successors, (217), 194 states have internal predecessors, (217), 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) [2021-11-07 07:46:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2021-11-07 07:46:48,265 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 192 [2021-11-07 07:46:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:48,265 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2021-11-07 07:46:48,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 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) [2021-11-07 07:46:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2021-11-07 07:46:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-07 07:46:48,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:48,267 INFO L513 BasicCegarLoop]: trace histogram [94, 72, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:48,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-07 07:46:48,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-07 07:46:48,485 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1404888759, now seen corresponding path program 69 times [2021-11-07 07:46:48,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:48,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672036824] [2021-11-07 07:46:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:48,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3139 proven. 5256 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:46:50,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:50,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672036824] [2021-11-07 07:46:50,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672036824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:50,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812873607] [2021-11-07 07:46:50,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:46:50,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:50,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:50,533 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:50,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 07:46:52,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-07 07:46:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:46:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3240 proven. 484 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2021-11-07 07:46:54,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812873607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:54,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:54,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 25] total 98 [2021-11-07 07:46:54,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995494506] [2021-11-07 07:46:54,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-07 07:46:54,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:54,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-07 07:46:54,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 07:46:54,434 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 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) [2021-11-07 07:46:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:55,016 INFO L93 Difference]: Finished difference Result 249 states and 297 transitions. [2021-11-07 07:46:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-07 07:46:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 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 194 [2021-11-07 07:46:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:55,017 INFO L225 Difference]: With dead ends: 249 [2021-11-07 07:46:55,018 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 07:46:55,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 07:46:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 07:46:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-07 07:46:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.121212121212121) internal successors, (222), 198 states have internal predecessors, (222), 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) [2021-11-07 07:46:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2021-11-07 07:46:55,023 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 194 [2021-11-07 07:46:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2021-11-07 07:46:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 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) [2021-11-07 07:46:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2021-11-07 07:46:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-07 07:46:55,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:55,025 INFO L513 BasicCegarLoop]: trace histogram [96, 73, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:55,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-07 07:46:55,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:55,229 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -228448449, now seen corresponding path program 70 times [2021-11-07 07:46:55,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:55,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842777793] [2021-11-07 07:46:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:55,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:46:57,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:57,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842777793] [2021-11-07 07:46:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842777793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:57,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867179227] [2021-11-07 07:46:57,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:57,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:57,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:57,288 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:57,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 07:46:59,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:59,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:59,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-07 07:46:59,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:47:00,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867179227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:00,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:00,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-11-07 07:47:00,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943414278] [2021-11-07 07:47:00,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-07 07:47:00,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-07 07:47:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:47:00,065 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 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) [2021-11-07 07:47:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:00,290 INFO L93 Difference]: Finished difference Result 252 states and 299 transitions. [2021-11-07 07:47:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 07:47:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 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 198 [2021-11-07 07:47:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:00,291 INFO L225 Difference]: With dead ends: 252 [2021-11-07 07:47:00,291 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 07:47:00,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:47:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 07:47:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-11-07 07:47:00,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.12) internal successors, (224), 200 states have internal predecessors, (224), 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) [2021-11-07 07:47:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 224 transitions. [2021-11-07 07:47:00,303 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 224 transitions. Word has length 198 [2021-11-07 07:47:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:00,303 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 224 transitions. [2021-11-07 07:47:00,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 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) [2021-11-07 07:47:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 224 transitions. [2021-11-07 07:47:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-07 07:47:00,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:00,305 INFO L513 BasicCegarLoop]: trace histogram [97, 74, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:00,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:00,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:00,529 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1585148514, now seen corresponding path program 71 times [2021-11-07 07:47:00,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:00,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738521774] [2021-11-07 07:47:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:00,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:47:02,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:02,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738521774] [2021-11-07 07:47:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738521774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:02,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322699427] [2021-11-07 07:47:02,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:47:02,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:02,681 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:02,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-07 07:47:05,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 98 check-sat command(s) [2021-11-07 07:47:05,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:05,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:47:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:47:05,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322699427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:05,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:05,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-07 07:47:05,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26775366] [2021-11-07 07:47:05,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 07:47:05,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 07:47:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:47:05,637 INFO L87 Difference]: Start difference. First operand 201 states and 224 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 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) [2021-11-07 07:47:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:05,907 INFO L93 Difference]: Finished difference Result 254 states and 301 transitions. [2021-11-07 07:47:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-07 07:47:05,907 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 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 200 [2021-11-07 07:47:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:05,909 INFO L225 Difference]: With dead ends: 254 [2021-11-07 07:47:05,909 INFO L226 Difference]: Without dead ends: 203 [2021-11-07 07:47:05,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:47:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-07 07:47:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-11-07 07:47:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.118811881188119) internal successors, (226), 202 states have internal predecessors, (226), 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) [2021-11-07 07:47:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 226 transitions. [2021-11-07 07:47:05,918 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 226 transitions. Word has length 200 [2021-11-07 07:47:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:05,918 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 226 transitions. [2021-11-07 07:47:05,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 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) [2021-11-07 07:47:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 226 transitions. [2021-11-07 07:47:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-07 07:47:05,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:05,920 INFO L513 BasicCegarLoop]: trace histogram [98, 75, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:05,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:06,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-07 07:47:06,145 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash 695107781, now seen corresponding path program 72 times [2021-11-07 07:47:06,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:06,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497541169] [2021-11-07 07:47:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:06,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3420 proven. 5700 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:47:08,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:08,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497541169] [2021-11-07 07:47:08,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497541169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:08,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891903129] [2021-11-07 07:47:08,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:47:08,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:08,495 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:08,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 07:47:10,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-11-07 07:47:10,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:47:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3525 proven. 529 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2021-11-07 07:47:12,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891903129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:12,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:12,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 26] total 102 [2021-11-07 07:47:12,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493833783] [2021-11-07 07:47:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 07:47:12,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 07:47:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:47:12,701 INFO L87 Difference]: Start difference. First operand 203 states and 226 transitions. Second operand has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 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) [2021-11-07 07:47:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:13,187 INFO L93 Difference]: Finished difference Result 259 states and 309 transitions. [2021-11-07 07:47:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-07 07:47:13,188 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 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 202 [2021-11-07 07:47:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:13,189 INFO L225 Difference]: With dead ends: 259 [2021-11-07 07:47:13,189 INFO L226 Difference]: Without dead ends: 208 [2021-11-07 07:47:13,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:47:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-07 07:47:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-07 07:47:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1213592233009708) internal successors, (231), 206 states have internal predecessors, (231), 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) [2021-11-07 07:47:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2021-11-07 07:47:13,194 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 202 [2021-11-07 07:47:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2021-11-07 07:47:13,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 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) [2021-11-07 07:47:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2021-11-07 07:47:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-07 07:47:13,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:13,197 INFO L513 BasicCegarLoop]: trace histogram [100, 76, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:13,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:13,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:13,409 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1864164045, now seen corresponding path program 73 times [2021-11-07 07:47:13,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:13,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274331611] [2021-11-07 07:47:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:13,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:47:15,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:15,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274331611] [2021-11-07 07:47:15,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274331611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:15,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950247245] [2021-11-07 07:47:15,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:47:15,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:15,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:15,982 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:15,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-07 07:47:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:18,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 07:47:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:47:18,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950247245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:18,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:18,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-11-07 07:47:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594645703] [2021-11-07 07:47:18,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 07:47:18,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 07:47:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:47:18,982 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 80 states have internal predecessors, (165), 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) [2021-11-07 07:47:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:19,200 INFO L93 Difference]: Finished difference Result 262 states and 311 transitions. [2021-11-07 07:47:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 07:47:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 80 states have internal predecessors, (165), 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 206 [2021-11-07 07:47:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:19,202 INFO L225 Difference]: With dead ends: 262 [2021-11-07 07:47:19,202 INFO L226 Difference]: Without dead ends: 209 [2021-11-07 07:47:19,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:47:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-07 07:47:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-07 07:47:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1201923076923077) internal successors, (233), 208 states have internal predecessors, (233), 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) [2021-11-07 07:47:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 233 transitions. [2021-11-07 07:47:19,209 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 233 transitions. Word has length 206 [2021-11-07 07:47:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:19,210 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 233 transitions. [2021-11-07 07:47:19,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 80 states have internal predecessors, (165), 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) [2021-11-07 07:47:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 233 transitions. [2021-11-07 07:47:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-07 07:47:19,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:19,212 INFO L513 BasicCegarLoop]: trace histogram [101, 77, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:19,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:19,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:19,437 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:19,438 INFO L85 PathProgramCache]: Analyzing trace with hash 68573936, now seen corresponding path program 74 times [2021-11-07 07:47:19,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:19,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303416623] [2021-11-07 07:47:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:19,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:47:21,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:21,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303416623] [2021-11-07 07:47:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303416623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639511234] [2021-11-07 07:47:21,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:47:21,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:21,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:21,636 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:21,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-07 07:47:24,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:47:24,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:24,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-07 07:47:24,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:47:24,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639511234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:24,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:24,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-11-07 07:47:24,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903654289] [2021-11-07 07:47:24,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-07 07:47:24,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-07 07:47:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:47:24,606 INFO L87 Difference]: Start difference. First operand 209 states and 233 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 81 states have internal predecessors, (167), 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) [2021-11-07 07:47:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:24,830 INFO L93 Difference]: Finished difference Result 264 states and 313 transitions. [2021-11-07 07:47:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 07:47:24,831 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 81 states have internal predecessors, (167), 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 208 [2021-11-07 07:47:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:24,833 INFO L225 Difference]: With dead ends: 264 [2021-11-07 07:47:24,833 INFO L226 Difference]: Without dead ends: 211 [2021-11-07 07:47:24,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:47:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-07 07:47:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-07 07:47:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.119047619047619) internal successors, (235), 210 states have internal predecessors, (235), 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) [2021-11-07 07:47:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2021-11-07 07:47:24,840 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 208 [2021-11-07 07:47:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:24,840 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2021-11-07 07:47:24,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 81 states have internal predecessors, (167), 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) [2021-11-07 07:47:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2021-11-07 07:47:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 07:47:24,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:24,842 INFO L513 BasicCegarLoop]: trace histogram [102, 78, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:24,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:25,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-07 07:47:25,069 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1083332179, now seen corresponding path program 75 times [2021-11-07 07:47:25,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:25,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358136373] [2021-11-07 07:47:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:25,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3713 proven. 6162 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:47:27,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:27,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358136373] [2021-11-07 07:47:27,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358136373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:27,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634226464] [2021-11-07 07:47:27,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:47:27,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:27,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:27,289 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:27,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 07:47:29,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2021-11-07 07:47:29,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:29,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:47:29,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3822 proven. 576 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2021-11-07 07:47:31,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634226464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:31,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:31,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 27] total 106 [2021-11-07 07:47:31,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184388402] [2021-11-07 07:47:31,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-07 07:47:31,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-07 07:47:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 07:47:31,678 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 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) [2021-11-07 07:47:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:32,314 INFO L93 Difference]: Finished difference Result 269 states and 321 transitions. [2021-11-07 07:47:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 07:47:32,314 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 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 210 [2021-11-07 07:47:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:32,315 INFO L225 Difference]: With dead ends: 269 [2021-11-07 07:47:32,316 INFO L226 Difference]: Without dead ends: 216 [2021-11-07 07:47:32,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 07:47:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-07 07:47:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-11-07 07:47:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.1214953271028036) internal successors, (240), 214 states have internal predecessors, (240), 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) [2021-11-07 07:47:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2021-11-07 07:47:32,321 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 210 [2021-11-07 07:47:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:32,321 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2021-11-07 07:47:32,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 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) [2021-11-07 07:47:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2021-11-07 07:47:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-07 07:47:32,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:32,323 INFO L513 BasicCegarLoop]: trace histogram [104, 79, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:32,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-07 07:47:32,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-07 07:47:32,525 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash -974390821, now seen corresponding path program 76 times [2021-11-07 07:47:32,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:32,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746282408] [2021-11-07 07:47:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:32,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:47:34,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:34,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746282408] [2021-11-07 07:47:34,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746282408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:34,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360716502] [2021-11-07 07:47:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:47:34,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:34,713 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-07 07:47:37,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:47:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:37,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 07:47:37,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:47:37,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360716502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:37,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:37,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-11-07 07:47:37,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450827132] [2021-11-07 07:47:37,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 07:47:37,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 07:47:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:47:37,781 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 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) [2021-11-07 07:47:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:37,947 INFO L93 Difference]: Finished difference Result 272 states and 323 transitions. [2021-11-07 07:47:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 07:47:37,947 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 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 214 [2021-11-07 07:47:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:37,948 INFO L225 Difference]: With dead ends: 272 [2021-11-07 07:47:37,948 INFO L226 Difference]: Without dead ends: 217 [2021-11-07 07:47:37,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:47:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-07 07:47:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-11-07 07:47:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1203703703703705) internal successors, (242), 216 states have internal predecessors, (242), 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) [2021-11-07 07:47:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2021-11-07 07:47:37,954 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 214 [2021-11-07 07:47:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:37,955 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2021-11-07 07:47:37,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 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) [2021-11-07 07:47:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2021-11-07 07:47:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-07 07:47:37,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:37,957 INFO L513 BasicCegarLoop]: trace histogram [105, 80, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:38,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:38,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 07:47:38,170 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1421304066, now seen corresponding path program 77 times [2021-11-07 07:47:38,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:38,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668165613] [2021-11-07 07:47:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:38,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:47:40,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:40,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668165613] [2021-11-07 07:47:40,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668165613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:40,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107427055] [2021-11-07 07:47:40,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:47:40,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:40,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:40,491 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:40,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-07 07:47:43,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 106 check-sat command(s) [2021-11-07 07:47:43,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:43,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-07 07:47:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:47:43,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107427055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:43,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:43,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-07 07:47:43,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828537803] [2021-11-07 07:47:43,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-07 07:47:43,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-07 07:47:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:47:43,781 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 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) [2021-11-07 07:47:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:43,994 INFO L93 Difference]: Finished difference Result 274 states and 325 transitions. [2021-11-07 07:47:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 07:47:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 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 216 [2021-11-07 07:47:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:43,996 INFO L225 Difference]: With dead ends: 274 [2021-11-07 07:47:43,996 INFO L226 Difference]: Without dead ends: 219 [2021-11-07 07:47:43,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:47:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-07 07:47:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-11-07 07:47:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.1192660550458715) internal successors, (244), 218 states have internal predecessors, (244), 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) [2021-11-07 07:47:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 244 transitions. [2021-11-07 07:47:44,001 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 244 transitions. Word has length 216 [2021-11-07 07:47:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:44,002 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 244 transitions. [2021-11-07 07:47:44,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 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) [2021-11-07 07:47:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 244 transitions. [2021-11-07 07:47:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-07 07:47:44,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:44,003 INFO L513 BasicCegarLoop]: trace histogram [106, 81, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:44,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-07 07:47:44,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:44,204 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1408202911, now seen corresponding path program 78 times [2021-11-07 07:47:44,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:44,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195734323] [2021-11-07 07:47:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:44,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4018 proven. 6642 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:47:46,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:46,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195734323] [2021-11-07 07:47:46,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195734323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:46,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950496185] [2021-11-07 07:47:46,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:47:46,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:46,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:46,816 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:46,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 07:47:49,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2021-11-07 07:47:49,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:49,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:47:49,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4131 proven. 625 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2021-11-07 07:47:51,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950496185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:51,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:51,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 28] total 110 [2021-11-07 07:47:51,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439175486] [2021-11-07 07:47:51,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-11-07 07:47:51,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-11-07 07:47:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 07:47:51,974 INFO L87 Difference]: Start difference. First operand 219 states and 244 transitions. Second operand has 110 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 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) [2021-11-07 07:47:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:52,799 INFO L93 Difference]: Finished difference Result 279 states and 333 transitions. [2021-11-07 07:47:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-07 07:47:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 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 218 [2021-11-07 07:47:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:52,801 INFO L225 Difference]: With dead ends: 279 [2021-11-07 07:47:52,801 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 07:47:52,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 07:47:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 07:47:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-11-07 07:47:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.1216216216216217) internal successors, (249), 222 states have internal predecessors, (249), 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) [2021-11-07 07:47:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 249 transitions. [2021-11-07 07:47:52,809 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 249 transitions. Word has length 218 [2021-11-07 07:47:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:52,810 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 249 transitions. [2021-11-07 07:47:52,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 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) [2021-11-07 07:47:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 249 transitions. [2021-11-07 07:47:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-07 07:47:52,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:52,812 INFO L513 BasicCegarLoop]: trace histogram [108, 82, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:52,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-07 07:47:53,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:53,037 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash -47215511, now seen corresponding path program 79 times [2021-11-07 07:47:53,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:53,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843594964] [2021-11-07 07:47:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:53,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:47:55,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:55,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843594964] [2021-11-07 07:47:55,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843594964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:55,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149287507] [2021-11-07 07:47:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:47:55,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:55,775 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:55,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-07 07:47:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:58,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:47:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:47:59,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149287507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:59,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:59,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-11-07 07:47:59,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753366961] [2021-11-07 07:47:59,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 07:47:59,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 07:47:59,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:47:59,282 INFO L87 Difference]: Start difference. First operand 223 states and 249 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 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) [2021-11-07 07:47:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:59,597 INFO L93 Difference]: Finished difference Result 282 states and 335 transitions. [2021-11-07 07:47:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-07 07:47:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 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 222 [2021-11-07 07:47:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:59,599 INFO L225 Difference]: With dead ends: 282 [2021-11-07 07:47:59,599 INFO L226 Difference]: Without dead ends: 225 [2021-11-07 07:47:59,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:47:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-07 07:47:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-11-07 07:47:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.1205357142857142) internal successors, (251), 224 states have internal predecessors, (251), 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) [2021-11-07 07:47:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2021-11-07 07:47:59,608 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 222 [2021-11-07 07:47:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:59,608 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2021-11-07 07:47:59,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 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) [2021-11-07 07:47:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2021-11-07 07:47:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-07 07:47:59,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:59,611 INFO L513 BasicCegarLoop]: trace histogram [109, 83, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:59,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:59,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:59,837 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 661806732, now seen corresponding path program 80 times [2021-11-07 07:47:59,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:59,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797271670] [2021-11-07 07:47:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:59,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:48:02,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:02,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797271670] [2021-11-07 07:48:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797271670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:02,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073224981] [2021-11-07 07:48:02,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:02,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:02,842 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:02,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-07 07:48:05,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-07 07:48:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:48:06,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073224981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:06,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:06,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-11-07 07:48:06,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503379568] [2021-11-07 07:48:06,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 07:48:06,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 07:48:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:48:06,646 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 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) [2021-11-07 07:48:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:06,885 INFO L93 Difference]: Finished difference Result 284 states and 337 transitions. [2021-11-07 07:48:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 07:48:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 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 224 [2021-11-07 07:48:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:06,895 INFO L225 Difference]: With dead ends: 284 [2021-11-07 07:48:06,895 INFO L226 Difference]: Without dead ends: 227 [2021-11-07 07:48:06,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:48:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-07 07:48:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-11-07 07:48:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.1194690265486726) internal successors, (253), 226 states have internal predecessors, (253), 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) [2021-11-07 07:48:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2021-11-07 07:48:06,904 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 224 [2021-11-07 07:48:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:06,904 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2021-11-07 07:48:06,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 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) [2021-11-07 07:48:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2021-11-07 07:48:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-07 07:48:06,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:06,906 INFO L513 BasicCegarLoop]: trace histogram [110, 84, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:06,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:07,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:07,121 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:07,122 INFO L85 PathProgramCache]: Analyzing trace with hash -867617809, now seen corresponding path program 81 times [2021-11-07 07:48:07,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:07,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503212691] [2021-11-07 07:48:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:07,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 4335 proven. 7140 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:48:09,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:09,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503212691] [2021-11-07 07:48:09,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503212691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:09,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680268414] [2021-11-07 07:48:09,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:09,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:09,918 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:09,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 07:48:13,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-11-07 07:48:13,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:13,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:48:13,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 4452 proven. 676 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2021-11-07 07:48:15,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680268414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:15,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:15,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 29] total 114 [2021-11-07 07:48:15,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137150005] [2021-11-07 07:48:15,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-07 07:48:15,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-07 07:48:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:48:15,662 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 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) [2021-11-07 07:48:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:16,462 INFO L93 Difference]: Finished difference Result 289 states and 345 transitions. [2021-11-07 07:48:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-07 07:48:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 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 226 [2021-11-07 07:48:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:16,464 INFO L225 Difference]: With dead ends: 289 [2021-11-07 07:48:16,464 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 07:48:16,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:48:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 07:48:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-07 07:48:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1217391304347826) internal successors, (258), 230 states have internal predecessors, (258), 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) [2021-11-07 07:48:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2021-11-07 07:48:16,471 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 226 [2021-11-07 07:48:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:16,471 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2021-11-07 07:48:16,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 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) [2021-11-07 07:48:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2021-11-07 07:48:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-07 07:48:16,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:16,473 INFO L513 BasicCegarLoop]: trace histogram [112, 85, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:16,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:16,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-07 07:48:16,674 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:16,674 INFO L85 PathProgramCache]: Analyzing trace with hash -356533641, now seen corresponding path program 82 times [2021-11-07 07:48:16,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:16,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241692397] [2021-11-07 07:48:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:16,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4558 proven. 7310 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:48:19,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:19,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241692397] [2021-11-07 07:48:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241692397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:19,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698773040] [2021-11-07 07:48:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:19,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:19,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:19,749 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:19,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-07 07:48:22,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:22,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:22,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-07 07:48:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4558 proven. 7310 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:48:23,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698773040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:23,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:23,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2021-11-07 07:48:23,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947646820] [2021-11-07 07:48:23,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-07 07:48:23,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-07 07:48:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:48:23,536 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 89 states have internal predecessors, (183), 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) [2021-11-07 07:48:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:23,776 INFO L93 Difference]: Finished difference Result 292 states and 347 transitions. [2021-11-07 07:48:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-07 07:48:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 89 states have internal predecessors, (183), 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 230 [2021-11-07 07:48:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:23,778 INFO L225 Difference]: With dead ends: 292 [2021-11-07 07:48:23,778 INFO L226 Difference]: Without dead ends: 233 [2021-11-07 07:48:23,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:48:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-07 07:48:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-07 07:48:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.1206896551724137) internal successors, (260), 232 states have internal predecessors, (260), 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) [2021-11-07 07:48:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 260 transitions. [2021-11-07 07:48:23,787 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 260 transitions. Word has length 230 [2021-11-07 07:48:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:23,787 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 260 transitions. [2021-11-07 07:48:23,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 89 states have internal predecessors, (183), 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) [2021-11-07 07:48:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 260 transitions. [2021-11-07 07:48:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-07 07:48:23,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:23,790 INFO L513 BasicCegarLoop]: trace histogram [113, 86, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:23,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:24,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:24,001 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:24,002 INFO L85 PathProgramCache]: Analyzing trace with hash 460044698, now seen corresponding path program 83 times [2021-11-07 07:48:24,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:24,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953395945] [2021-11-07 07:48:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:24,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 4611 proven. 7482 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:48:27,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:27,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953395945] [2021-11-07 07:48:27,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953395945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:27,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194150435] [2021-11-07 07:48:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:27,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:27,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:27,238 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:27,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-07 07:48:30,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2021-11-07 07:48:30,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-07 07:48:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 4611 proven. 7482 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:48:31,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194150435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:31,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:31,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-07 07:48:31,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98086822] [2021-11-07 07:48:31,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-07 07:48:31,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-07 07:48:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:48:31,341 INFO L87 Difference]: Start difference. First operand 233 states and 260 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 90 states have internal predecessors, (185), 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) [2021-11-07 07:48:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:31,562 INFO L93 Difference]: Finished difference Result 294 states and 349 transitions. [2021-11-07 07:48:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-07 07:48:31,562 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 90 states have internal predecessors, (185), 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 232 [2021-11-07 07:48:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:31,563 INFO L225 Difference]: With dead ends: 294 [2021-11-07 07:48:31,563 INFO L226 Difference]: Without dead ends: 235 [2021-11-07 07:48:31,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:48:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-07 07:48:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-11-07 07:48:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.1196581196581197) internal successors, (262), 234 states have internal predecessors, (262), 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) [2021-11-07 07:48:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 262 transitions. [2021-11-07 07:48:31,568 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 262 transitions. Word has length 232 [2021-11-07 07:48:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:31,568 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 262 transitions. [2021-11-07 07:48:31,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 90 states have internal predecessors, (185), 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) [2021-11-07 07:48:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 262 transitions. [2021-11-07 07:48:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-07 07:48:31,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:31,574 INFO L513 BasicCegarLoop]: trace histogram [114, 87, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:31,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:31,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:31,775 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash -787186691, now seen corresponding path program 84 times [2021-11-07 07:48:31,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:31,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226369250] [2021-11-07 07:48:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:31,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 4664 proven. 7656 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:48:34,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:34,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226369250] [2021-11-07 07:48:34,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226369250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:34,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613207437] [2021-11-07 07:48:34,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:34,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:34,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:34,894 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:34,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-07 07:48:38,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 111 check-sat command(s) [2021-11-07 07:48:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:48:38,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 4785 proven. 729 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2021-11-07 07:48:41,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613207437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:41,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:41,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 30] total 118 [2021-11-07 07:48:41,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354495125] [2021-11-07 07:48:41,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-07 07:48:41,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-07 07:48:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 07:48:41,175 INFO L87 Difference]: Start difference. First operand 235 states and 262 transitions. Second operand has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 118 states have internal predecessors, (243), 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) [2021-11-07 07:48:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:41,944 INFO L93 Difference]: Finished difference Result 299 states and 357 transitions. [2021-11-07 07:48:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-07 07:48:41,944 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 118 states have internal predecessors, (243), 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 234 [2021-11-07 07:48:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:41,945 INFO L225 Difference]: With dead ends: 299 [2021-11-07 07:48:41,945 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 07:48:41,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 07:48:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 07:48:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-11-07 07:48:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1218487394957983) internal successors, (267), 238 states have internal predecessors, (267), 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) [2021-11-07 07:48:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 267 transitions. [2021-11-07 07:48:41,951 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 267 transitions. Word has length 234 [2021-11-07 07:48:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:41,951 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 267 transitions. [2021-11-07 07:48:41,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 118 states have internal predecessors, (243), 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) [2021-11-07 07:48:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 267 transitions. [2021-11-07 07:48:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-07 07:48:41,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:41,953 INFO L513 BasicCegarLoop]: trace histogram [116, 88, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:41,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-07 07:48:42,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-07 07:48:42,153 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash 904700933, now seen corresponding path program 85 times [2021-11-07 07:48:42,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:42,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25131949] [2021-11-07 07:48:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:42,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 4895 proven. 7832 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:48:45,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:45,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25131949] [2021-11-07 07:48:45,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25131949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:45,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503616271] [2021-11-07 07:48:45,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:45,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:45,525 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:45,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-07 07:48:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:49,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 07:48:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 4895 proven. 7832 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:48:49,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503616271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:49,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:49,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-11-07 07:48:49,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602535726] [2021-11-07 07:48:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-07 07:48:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-07 07:48:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 07:48:49,743 INFO L87 Difference]: Start difference. First operand 239 states and 267 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 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) [2021-11-07 07:48:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:49,982 INFO L93 Difference]: Finished difference Result 302 states and 359 transitions. [2021-11-07 07:48:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-07 07:48:49,982 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 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 238 [2021-11-07 07:48:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:49,984 INFO L225 Difference]: With dead ends: 302 [2021-11-07 07:48:49,984 INFO L226 Difference]: Without dead ends: 241 [2021-11-07 07:48:49,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 07:48:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-07 07:48:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-07 07:48:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.1208333333333333) internal successors, (269), 240 states have internal predecessors, (269), 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) [2021-11-07 07:48:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 269 transitions. [2021-11-07 07:48:49,990 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 269 transitions. Word has length 238 [2021-11-07 07:48:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:49,990 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 269 transitions. [2021-11-07 07:48:49,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 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) [2021-11-07 07:48:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 269 transitions. [2021-11-07 07:48:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-07 07:48:49,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:49,991 INFO L513 BasicCegarLoop]: trace histogram [117, 89, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:50,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-11-07 07:48:50,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:50,193 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash -75182040, now seen corresponding path program 86 times [2021-11-07 07:48:50,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:50,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438679745] [2021-11-07 07:48:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:50,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 4950 proven. 8010 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:48:53,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:53,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438679745] [2021-11-07 07:48:53,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438679745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:53,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681359755] [2021-11-07 07:48:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:53,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:53,430 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:53,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-07 07:48:56,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-07 07:48:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 4950 proven. 8010 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:48:57,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681359755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:57,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:57,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-11-07 07:48:57,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664909701] [2021-11-07 07:48:57,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-07 07:48:57,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-07 07:48:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:48:57,563 INFO L87 Difference]: Start difference. First operand 241 states and 269 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 93 states have internal predecessors, (191), 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) [2021-11-07 07:48:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:57,815 INFO L93 Difference]: Finished difference Result 304 states and 361 transitions. [2021-11-07 07:48:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-07 07:48:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 93 states have internal predecessors, (191), 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 240 [2021-11-07 07:48:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:57,817 INFO L225 Difference]: With dead ends: 304 [2021-11-07 07:48:57,817 INFO L226 Difference]: Without dead ends: 243 [2021-11-07 07:48:57,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:48:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-07 07:48:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2021-11-07 07:48:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 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) [2021-11-07 07:48:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 271 transitions. [2021-11-07 07:48:57,822 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 271 transitions. Word has length 240 [2021-11-07 07:48:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:57,822 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 271 transitions. [2021-11-07 07:48:57,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 93 states have internal predecessors, (191), 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) [2021-11-07 07:48:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 271 transitions. [2021-11-07 07:48:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-07 07:48:57,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:57,823 INFO L513 BasicCegarLoop]: trace histogram [118, 90, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:57,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:58,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:58,024 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1144881269, now seen corresponding path program 87 times [2021-11-07 07:48:58,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:58,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465300359] [2021-11-07 07:48:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:58,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 5005 proven. 8190 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:49:00,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:00,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465300359] [2021-11-07 07:49:00,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465300359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:00,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068169405] [2021-11-07 07:49:00,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:00,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:00,968 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:00,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-07 07:49:04,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-11-07 07:49:04,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:04,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:49:04,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 5130 proven. 784 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2021-11-07 07:49:06,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068169405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:06,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:06,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 31] total 122 [2021-11-07 07:49:06,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73913116] [2021-11-07 07:49:06,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-07 07:49:06,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-07 07:49:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:49:06,614 INFO L87 Difference]: Start difference. First operand 243 states and 271 transitions. Second operand has 122 states, 122 states have (on average 2.057377049180328) internal successors, (251), 122 states have internal predecessors, (251), 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) [2021-11-07 07:49:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:07,291 INFO L93 Difference]: Finished difference Result 309 states and 369 transitions. [2021-11-07 07:49:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-07 07:49:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.057377049180328) internal successors, (251), 122 states have internal predecessors, (251), 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 242 [2021-11-07 07:49:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:07,293 INFO L225 Difference]: With dead ends: 309 [2021-11-07 07:49:07,293 INFO L226 Difference]: Without dead ends: 248 [2021-11-07 07:49:07,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:49:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-07 07:49:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-11-07 07:49:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.1219512195121952) internal successors, (276), 246 states have internal predecessors, (276), 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) [2021-11-07 07:49:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 276 transitions. [2021-11-07 07:49:07,300 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 276 transitions. Word has length 242 [2021-11-07 07:49:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:07,300 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 276 transitions. [2021-11-07 07:49:07,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.057377049180328) internal successors, (251), 122 states have internal predecessors, (251), 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) [2021-11-07 07:49:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 276 transitions. [2021-11-07 07:49:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-07 07:49:07,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:07,302 INFO L513 BasicCegarLoop]: trace histogram [120, 91, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:07,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:07,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:07,517 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:07,518 INFO L85 PathProgramCache]: Analyzing trace with hash -646026989, now seen corresponding path program 88 times [2021-11-07 07:49:07,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:07,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620205695] [2021-11-07 07:49:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:07,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 5244 proven. 8372 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:49:10,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:10,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620205695] [2021-11-07 07:49:10,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620205695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:10,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648855065] [2021-11-07 07:49:10,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:10,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:10,389 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:10,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-07 07:49:13,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:13,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:13,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-07 07:49:13,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 5244 proven. 8372 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:49:14,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648855065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:14,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:14,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-11-07 07:49:14,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820185797] [2021-11-07 07:49:14,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 07:49:14,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 07:49:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:49:14,141 INFO L87 Difference]: Start difference. First operand 247 states and 276 transitions. Second operand has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 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) [2021-11-07 07:49:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:14,321 INFO L93 Difference]: Finished difference Result 312 states and 371 transitions. [2021-11-07 07:49:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 07:49:14,321 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 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 246 [2021-11-07 07:49:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:14,322 INFO L225 Difference]: With dead ends: 312 [2021-11-07 07:49:14,322 INFO L226 Difference]: Without dead ends: 249 [2021-11-07 07:49:14,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:49:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-07 07:49:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-07 07:49:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.1209677419354838) internal successors, (278), 248 states have internal predecessors, (278), 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) [2021-11-07 07:49:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 278 transitions. [2021-11-07 07:49:14,330 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 278 transitions. Word has length 246 [2021-11-07 07:49:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:14,330 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 278 transitions. [2021-11-07 07:49:14,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 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) [2021-11-07 07:49:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 278 transitions. [2021-11-07 07:49:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-07 07:49:14,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:14,332 INFO L513 BasicCegarLoop]: trace histogram [121, 92, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:14,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:14,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:14,545 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1887059402, now seen corresponding path program 89 times [2021-11-07 07:49:14,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:14,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751003599] [2021-11-07 07:49:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:14,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 5301 proven. 8556 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:49:17,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:17,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751003599] [2021-11-07 07:49:17,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751003599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:17,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974751741] [2021-11-07 07:49:17,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:17,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:17,493 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:17,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-07 07:49:20,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 122 check-sat command(s) [2021-11-07 07:49:20,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:20,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-07 07:49:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 5301 proven. 8556 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:49:21,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974751741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:21,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:21,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-07 07:49:21,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489492423] [2021-11-07 07:49:21,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 07:49:21,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:21,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 07:49:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:49:21,370 INFO L87 Difference]: Start difference. First operand 249 states and 278 transitions. Second operand has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 96 states have internal predecessors, (197), 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) [2021-11-07 07:49:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:21,575 INFO L93 Difference]: Finished difference Result 314 states and 373 transitions. [2021-11-07 07:49:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-07 07:49:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 96 states have internal predecessors, (197), 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 248 [2021-11-07 07:49:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:21,576 INFO L225 Difference]: With dead ends: 314 [2021-11-07 07:49:21,576 INFO L226 Difference]: Without dead ends: 251 [2021-11-07 07:49:21,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:49:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-07 07:49:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-11-07 07:49:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.12) internal successors, (280), 250 states have internal predecessors, (280), 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) [2021-11-07 07:49:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 280 transitions. [2021-11-07 07:49:21,581 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 280 transitions. Word has length 248 [2021-11-07 07:49:21,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:21,581 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 280 transitions. [2021-11-07 07:49:21,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 96 states have internal predecessors, (197), 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) [2021-11-07 07:49:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 280 transitions. [2021-11-07 07:49:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-07 07:49:21,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:21,582 INFO L513 BasicCegarLoop]: trace histogram [122, 93, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:21,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-07 07:49:21,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:21,783 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:21,783 INFO L85 PathProgramCache]: Analyzing trace with hash -518300007, now seen corresponding path program 90 times [2021-11-07 07:49:21,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:21,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209812796] [2021-11-07 07:49:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:21,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 5358 proven. 8742 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:49:24,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:24,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209812796] [2021-11-07 07:49:24,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209812796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:24,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815698661] [2021-11-07 07:49:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:24,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:24,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:24,724 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:24,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-07 07:49:28,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 119 check-sat command(s) [2021-11-07 07:49:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:28,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:49:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 5487 proven. 841 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2021-11-07 07:49:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815698661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:30,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:30,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 32] total 126 [2021-11-07 07:49:30,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343810543] [2021-11-07 07:49:30,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-07 07:49:30,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-07 07:49:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:49:30,816 INFO L87 Difference]: Start difference. First operand 251 states and 280 transitions. Second operand has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 126 states have internal predecessors, (259), 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) [2021-11-07 07:49:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:31,523 INFO L93 Difference]: Finished difference Result 319 states and 381 transitions. [2021-11-07 07:49:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-07 07:49:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 126 states have internal predecessors, (259), 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 250 [2021-11-07 07:49:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:31,524 INFO L225 Difference]: With dead ends: 319 [2021-11-07 07:49:31,524 INFO L226 Difference]: Without dead ends: 256 [2021-11-07 07:49:31,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:49:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-07 07:49:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-11-07 07:49:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1220472440944882) internal successors, (285), 254 states have internal predecessors, (285), 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) [2021-11-07 07:49:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 285 transitions. [2021-11-07 07:49:31,529 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 285 transitions. Word has length 250 [2021-11-07 07:49:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:31,529 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 285 transitions. [2021-11-07 07:49:31,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 126 states have internal predecessors, (259), 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) [2021-11-07 07:49:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 285 transitions. [2021-11-07 07:49:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-07 07:49:31,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:31,530 INFO L513 BasicCegarLoop]: trace histogram [124, 94, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:31,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-07 07:49:31,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:31,731 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:31,731 INFO L85 PathProgramCache]: Analyzing trace with hash 632629665, now seen corresponding path program 91 times [2021-11-07 07:49:31,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:31,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624235868] [2021-11-07 07:49:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:31,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 5605 proven. 8930 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 07:49:34,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:34,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624235868] [2021-11-07 07:49:34,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624235868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:34,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169653379] [2021-11-07 07:49:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:34,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:34,757 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:34,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-07 07:49:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 07:49:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 5605 proven. 8930 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 07:49:38,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169653379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:38,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:38,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2021-11-07 07:49:38,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527087497] [2021-11-07 07:49:38,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-07 07:49:38,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-07 07:49:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 07:49:38,722 INFO L87 Difference]: Start difference. First operand 255 states and 285 transitions. Second operand has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 98 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) [2021-11-07 07:49:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:38,916 INFO L93 Difference]: Finished difference Result 322 states and 383 transitions. [2021-11-07 07:49:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 07:49:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 98 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) Word has length 254 [2021-11-07 07:49:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:38,917 INFO L225 Difference]: With dead ends: 322 [2021-11-07 07:49:38,917 INFO L226 Difference]: Without dead ends: 257 [2021-11-07 07:49:38,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 07:49:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-07 07:49:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-11-07 07:49:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.12109375) internal successors, (287), 256 states have internal predecessors, (287), 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) [2021-11-07 07:49:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 287 transitions. [2021-11-07 07:49:38,923 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 287 transitions. Word has length 254 [2021-11-07 07:49:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:38,923 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 287 transitions. [2021-11-07 07:49:38,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 98 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) [2021-11-07 07:49:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 287 transitions. [2021-11-07 07:49:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-07 07:49:38,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:38,924 INFO L513 BasicCegarLoop]: trace histogram [125, 95, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:38,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:39,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:39,125 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash -189878332, now seen corresponding path program 92 times [2021-11-07 07:49:39,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:39,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376621404] [2021-11-07 07:49:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:39,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 5664 proven. 9120 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 07:49:42,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:42,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376621404] [2021-11-07 07:49:42,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376621404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:42,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935723168] [2021-11-07 07:49:42,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:42,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:42,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:42,204 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:42,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-07 07:49:45,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:45,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:45,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-07 07:49:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 5664 proven. 9120 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 07:49:46,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935723168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:46,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:46,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-11-07 07:49:46,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888219728] [2021-11-07 07:49:46,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 07:49:46,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 07:49:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:49:46,359 INFO L87 Difference]: Start difference. First operand 257 states and 287 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 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) [2021-11-07 07:49:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:46,562 INFO L93 Difference]: Finished difference Result 324 states and 385 transitions. [2021-11-07 07:49:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-07 07:49:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 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 256 [2021-11-07 07:49:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:46,563 INFO L225 Difference]: With dead ends: 324 [2021-11-07 07:49:46,563 INFO L226 Difference]: Without dead ends: 259 [2021-11-07 07:49:46,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:49:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-07 07:49:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-11-07 07:49:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.12015503875969) internal successors, (289), 258 states have internal predecessors, (289), 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) [2021-11-07 07:49:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 289 transitions. [2021-11-07 07:49:46,568 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 289 transitions. Word has length 256 [2021-11-07 07:49:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:46,569 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 289 transitions. [2021-11-07 07:49:46,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 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) [2021-11-07 07:49:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 289 transitions. [2021-11-07 07:49:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-07 07:49:46,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:46,570 INFO L513 BasicCegarLoop]: trace histogram [126, 96, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:46,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-07 07:49:46,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:46,771 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -346080985, now seen corresponding path program 93 times [2021-11-07 07:49:46,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:46,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071011776] [2021-11-07 07:49:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:46,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 5723 proven. 9312 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 07:49:49,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:49,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071011776] [2021-11-07 07:49:49,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071011776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:49,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687390312] [2021-11-07 07:49:49,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:49,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:49,893 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:49,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-07 07:49:53,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2021-11-07 07:49:53,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:53,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:49:53,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 5856 proven. 900 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2021-11-07 07:49:56,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687390312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:56,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:56,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 33] total 130 [2021-11-07 07:49:56,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771577749] [2021-11-07 07:49:56,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-07 07:49:56,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:56,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-07 07:49:56,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2021-11-07 07:49:56,169 INFO L87 Difference]: Start difference. First operand 259 states and 289 transitions. Second operand has 130 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 130 states have internal predecessors, (267), 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) [2021-11-07 07:49:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:56,968 INFO L93 Difference]: Finished difference Result 329 states and 393 transitions. [2021-11-07 07:49:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-07 07:49:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 130 states have internal predecessors, (267), 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 258 [2021-11-07 07:49:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:56,970 INFO L225 Difference]: With dead ends: 329 [2021-11-07 07:49:56,970 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 07:49:56,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2021-11-07 07:49:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 07:49:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-11-07 07:49:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.1221374045801527) internal successors, (294), 262 states have internal predecessors, (294), 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) [2021-11-07 07:49:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 294 transitions. [2021-11-07 07:49:56,979 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 294 transitions. Word has length 258 [2021-11-07 07:49:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:56,979 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 294 transitions. [2021-11-07 07:49:56,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 130 states have internal predecessors, (267), 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) [2021-11-07 07:49:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 294 transitions. [2021-11-07 07:49:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-07 07:49:56,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:56,981 INFO L513 BasicCegarLoop]: trace histogram [128, 97, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:57,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-11-07 07:49:57,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-11-07 07:49:57,185 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:57,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1112081839, now seen corresponding path program 94 times [2021-11-07 07:49:57,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:57,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47715581] [2021-11-07 07:49:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:57,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 5978 proven. 9506 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 07:50:00,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:00,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47715581] [2021-11-07 07:50:00,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47715581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:00,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761300909] [2021-11-07 07:50:00,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:00,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:00,419 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:00,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-07 07:50:04,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:04,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 07:50:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 5978 proven. 9506 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 07:50:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761300909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:04,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:04,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2021-11-07 07:50:04,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614841406] [2021-11-07 07:50:04,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-07 07:50:04,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-07 07:50:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:50:04,643 INFO L87 Difference]: Start difference. First operand 263 states and 294 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 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) [2021-11-07 07:50:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:04,864 INFO L93 Difference]: Finished difference Result 332 states and 395 transitions. [2021-11-07 07:50:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-07 07:50:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 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 262 [2021-11-07 07:50:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:04,865 INFO L225 Difference]: With dead ends: 332 [2021-11-07 07:50:04,865 INFO L226 Difference]: Without dead ends: 265 [2021-11-07 07:50:04,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:50:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-07 07:50:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2021-11-07 07:50:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.121212121212121) internal successors, (296), 264 states have internal predecessors, (296), 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) [2021-11-07 07:50:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 296 transitions. [2021-11-07 07:50:04,873 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 296 transitions. Word has length 262 [2021-11-07 07:50:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:04,873 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 296 transitions. [2021-11-07 07:50:04,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 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) [2021-11-07 07:50:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 296 transitions. [2021-11-07 07:50:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-07 07:50:04,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:04,875 INFO L513 BasicCegarLoop]: trace histogram [129, 98, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:04,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-07 07:50:05,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:05,089 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash 532134098, now seen corresponding path program 95 times [2021-11-07 07:50:05,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:05,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065225329] [2021-11-07 07:50:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:05,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 6039 proven. 9702 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 07:50:08,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:08,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065225329] [2021-11-07 07:50:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065225329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:08,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231740143] [2021-11-07 07:50:08,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:08,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:08,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:08,345 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:08,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-07 07:50:12,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2021-11-07 07:50:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:12,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 07:50:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 6039 proven. 9702 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 07:50:12,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231740143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:12,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:12,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-11-07 07:50:12,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961352158] [2021-11-07 07:50:12,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 07:50:12,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 07:50:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:50:12,714 INFO L87 Difference]: Start difference. First operand 265 states and 296 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 102 states have internal predecessors, (209), 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) [2021-11-07 07:50:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:12,993 INFO L93 Difference]: Finished difference Result 334 states and 397 transitions. [2021-11-07 07:50:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-07 07:50:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 102 states have internal predecessors, (209), 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 264 [2021-11-07 07:50:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:12,996 INFO L225 Difference]: With dead ends: 334 [2021-11-07 07:50:12,996 INFO L226 Difference]: Without dead ends: 267 [2021-11-07 07:50:12,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:50:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-07 07:50:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2021-11-07 07:50:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.1203007518796992) internal successors, (298), 266 states have internal predecessors, (298), 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) [2021-11-07 07:50:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 298 transitions. [2021-11-07 07:50:13,002 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 298 transitions. Word has length 264 [2021-11-07 07:50:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 298 transitions. [2021-11-07 07:50:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 102 states have internal predecessors, (209), 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) [2021-11-07 07:50:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 298 transitions. [2021-11-07 07:50:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-07 07:50:13,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:13,004 INFO L513 BasicCegarLoop]: trace histogram [130, 99, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:13,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:13,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:13,209 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:13,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1548103477, now seen corresponding path program 96 times [2021-11-07 07:50:13,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:13,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023098275] [2021-11-07 07:50:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:13,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 6100 proven. 9900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 07:50:16,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:16,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023098275] [2021-11-07 07:50:16,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023098275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:16,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038959718] [2021-11-07 07:50:16,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:50:16,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:16,580 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:16,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-07 07:50:20,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2021-11-07 07:50:20,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:20,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:50:20,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 6237 proven. 961 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2021-11-07 07:50:23,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038959718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:23,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:23,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 34] total 134 [2021-11-07 07:50:23,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411111490] [2021-11-07 07:50:23,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-07 07:50:23,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-07 07:50:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2021-11-07 07:50:23,423 INFO L87 Difference]: Start difference. First operand 267 states and 298 transitions. Second operand has 134 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 134 states have internal predecessors, (275), 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) [2021-11-07 07:50:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:24,372 INFO L93 Difference]: Finished difference Result 339 states and 405 transitions. [2021-11-07 07:50:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-11-07 07:50:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 134 states have internal predecessors, (275), 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 266 [2021-11-07 07:50:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:24,374 INFO L225 Difference]: With dead ends: 339 [2021-11-07 07:50:24,374 INFO L226 Difference]: Without dead ends: 272 [2021-11-07 07:50:24,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2021-11-07 07:50:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-07 07:50:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-11-07 07:50:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1222222222222222) internal successors, (303), 270 states have internal predecessors, (303), 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) [2021-11-07 07:50:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 303 transitions. [2021-11-07 07:50:24,381 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 303 transitions. Word has length 266 [2021-11-07 07:50:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:24,381 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 303 transitions. [2021-11-07 07:50:24,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 134 states have internal predecessors, (275), 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) [2021-11-07 07:50:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 303 transitions. [2021-11-07 07:50:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-07 07:50:24,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:24,382 INFO L513 BasicCegarLoop]: trace histogram [132, 100, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:24,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-07 07:50:24,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-07 07:50:24,583 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:24,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:24,583 INFO L85 PathProgramCache]: Analyzing trace with hash 812260669, now seen corresponding path program 97 times [2021-11-07 07:50:24,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:24,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547141460] [2021-11-07 07:50:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:24,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 6363 proven. 10100 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 07:50:28,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:28,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547141460] [2021-11-07 07:50:28,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547141460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:28,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606848472] [2021-11-07 07:50:28,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:50:28,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:28,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:28,078 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:28,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-07 07:50:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-07 07:50:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 6363 proven. 10100 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 07:50:32,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606848472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:32,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:32,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2021-11-07 07:50:32,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991167212] [2021-11-07 07:50:32,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-07 07:50:32,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-07 07:50:32,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 07:50:32,545 INFO L87 Difference]: Start difference. First operand 271 states and 303 transitions. Second operand has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 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) [2021-11-07 07:50:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:32,760 INFO L93 Difference]: Finished difference Result 342 states and 407 transitions. [2021-11-07 07:50:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 07:50:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 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 270 [2021-11-07 07:50:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:32,762 INFO L225 Difference]: With dead ends: 342 [2021-11-07 07:50:32,762 INFO L226 Difference]: Without dead ends: 273 [2021-11-07 07:50:32,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 07:50:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-07 07:50:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-07 07:50:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1213235294117647) internal successors, (305), 272 states have internal predecessors, (305), 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) [2021-11-07 07:50:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 305 transitions. [2021-11-07 07:50:32,770 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 305 transitions. Word has length 270 [2021-11-07 07:50:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:32,771 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 305 transitions. [2021-11-07 07:50:32,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 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) [2021-11-07 07:50:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 305 transitions. [2021-11-07 07:50:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-07 07:50:32,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:32,773 INFO L513 BasicCegarLoop]: trace histogram [133, 101, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:32,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:32,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-07 07:50:32,977 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash -556728992, now seen corresponding path program 98 times [2021-11-07 07:50:32,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:32,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645676313] [2021-11-07 07:50:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:32,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 6426 proven. 10302 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 07:50:36,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:36,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645676313] [2021-11-07 07:50:36,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645676313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:36,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219916070] [2021-11-07 07:50:36,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:50:36,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:36,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:36,448 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:36,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-07 07:50:40,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:50:40,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-07 07:50:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 6426 proven. 10302 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 07:50:40,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219916070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:40,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:40,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-11-07 07:50:40,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232182179] [2021-11-07 07:50:40,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 07:50:40,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 07:50:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:50:40,978 INFO L87 Difference]: Start difference. First operand 273 states and 305 transitions. Second operand has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 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) [2021-11-07 07:50:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:41,188 INFO L93 Difference]: Finished difference Result 344 states and 409 transitions. [2021-11-07 07:50:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-07 07:50:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 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 272 [2021-11-07 07:50:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:41,189 INFO L225 Difference]: With dead ends: 344 [2021-11-07 07:50:41,189 INFO L226 Difference]: Without dead ends: 275 [2021-11-07 07:50:41,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:50:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-07 07:50:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-11-07 07:50:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.1204379562043796) internal successors, (307), 274 states have internal predecessors, (307), 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) [2021-11-07 07:50:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 307 transitions. [2021-11-07 07:50:41,195 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 307 transitions. Word has length 272 [2021-11-07 07:50:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:41,195 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 307 transitions. [2021-11-07 07:50:41,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 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) [2021-11-07 07:50:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 307 transitions. [2021-11-07 07:50:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-07 07:50:41,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:41,197 INFO L513 BasicCegarLoop]: trace histogram [134, 102, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:41,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-07 07:50:41,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-07 07:50:41,405 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1895800637, now seen corresponding path program 99 times [2021-11-07 07:50:41,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:41,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427555520] [2021-11-07 07:50:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:41,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 6489 proven. 10506 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 07:50:44,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:44,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427555520] [2021-11-07 07:50:44,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427555520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:44,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529580421] [2021-11-07 07:50:44,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:50:44,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:44,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:44,986 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:44,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-07 07:50:49,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2021-11-07 07:50:49,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:50:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 6630 proven. 1024 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2021-11-07 07:50:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529580421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:52,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:52,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 35] total 138 [2021-11-07 07:50:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257502047] [2021-11-07 07:50:52,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2021-11-07 07:50:52,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-11-07 07:50:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2021-11-07 07:50:52,016 INFO L87 Difference]: Start difference. First operand 275 states and 307 transitions. Second operand has 138 states, 138 states have (on average 2.050724637681159) internal successors, (283), 138 states have internal predecessors, (283), 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) [2021-11-07 07:50:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:53,095 INFO L93 Difference]: Finished difference Result 349 states and 417 transitions. [2021-11-07 07:50:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-07 07:50:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.050724637681159) internal successors, (283), 138 states have internal predecessors, (283), 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 274 [2021-11-07 07:50:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:53,097 INFO L225 Difference]: With dead ends: 349 [2021-11-07 07:50:53,097 INFO L226 Difference]: Without dead ends: 280 [2021-11-07 07:50:53,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2021-11-07 07:50:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-07 07:50:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2021-11-07 07:50:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.1223021582733812) internal successors, (312), 278 states have internal predecessors, (312), 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) [2021-11-07 07:50:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 312 transitions. [2021-11-07 07:50:53,106 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 312 transitions. Word has length 274 [2021-11-07 07:50:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:53,106 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 312 transitions. [2021-11-07 07:50:53,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.050724637681159) internal successors, (283), 138 states have internal predecessors, (283), 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) [2021-11-07 07:50:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 312 transitions. [2021-11-07 07:50:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-07 07:50:53,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:53,108 INFO L513 BasicCegarLoop]: trace histogram [136, 103, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:53,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-07 07:50:53,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-07 07:50:53,313 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1287688267, now seen corresponding path program 100 times [2021-11-07 07:50:53,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:53,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476243457] [2021-11-07 07:50:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:53,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 6760 proven. 10712 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 07:50:56,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:56,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476243457] [2021-11-07 07:50:56,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476243457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:56,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975336427] [2021-11-07 07:50:56,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:56,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:56,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:56,960 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:56,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-07 07:51:01,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:51:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:01,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-07 07:51:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 6760 proven. 10712 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 07:51:01,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975336427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:01,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:01,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2021-11-07 07:51:01,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099980044] [2021-11-07 07:51:01,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 07:51:01,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 07:51:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:51:01,677 INFO L87 Difference]: Start difference. First operand 279 states and 312 transitions. Second operand has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 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) [2021-11-07 07:51:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:01,898 INFO L93 Difference]: Finished difference Result 352 states and 419 transitions. [2021-11-07 07:51:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 07:51:01,898 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 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 278 [2021-11-07 07:51:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:01,899 INFO L225 Difference]: With dead ends: 352 [2021-11-07 07:51:01,899 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 07:51:01,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:51:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 07:51:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-07 07:51:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1214285714285714) internal successors, (314), 280 states have internal predecessors, (314), 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) [2021-11-07 07:51:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 314 transitions. [2021-11-07 07:51:01,903 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 314 transitions. Word has length 278 [2021-11-07 07:51:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:01,903 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 314 transitions. [2021-11-07 07:51:01,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 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) [2021-11-07 07:51:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 314 transitions. [2021-11-07 07:51:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-07 07:51:01,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:01,904 INFO L513 BasicCegarLoop]: trace histogram [137, 104, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:01,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:02,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-07 07:51:02,105 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:02,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1537383790, now seen corresponding path program 101 times [2021-11-07 07:51:02,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:02,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230512894] [2021-11-07 07:51:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:02,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 6825 proven. 10920 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 07:51:05,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:05,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230512894] [2021-11-07 07:51:05,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230512894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:05,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729474370] [2021-11-07 07:51:05,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:51:05,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:05,755 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:05,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-07 07:51:10,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 138 check-sat command(s) [2021-11-07 07:51:10,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 07:51:10,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 6825 proven. 10920 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 07:51:10,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729474370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:10,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:10,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2021-11-07 07:51:10,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870730695] [2021-11-07 07:51:10,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-07 07:51:10,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-07 07:51:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 07:51:10,672 INFO L87 Difference]: Start difference. First operand 281 states and 314 transitions. Second operand has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 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) [2021-11-07 07:51:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:10,894 INFO L93 Difference]: Finished difference Result 354 states and 421 transitions. [2021-11-07 07:51:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-07 07:51:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 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 280 [2021-11-07 07:51:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:10,895 INFO L225 Difference]: With dead ends: 354 [2021-11-07 07:51:10,895 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 07:51:10,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 07:51:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 07:51:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-11-07 07:51:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.1205673758865249) internal successors, (316), 282 states have internal predecessors, (316), 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) [2021-11-07 07:51:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 316 transitions. [2021-11-07 07:51:10,900 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 316 transitions. Word has length 280 [2021-11-07 07:51:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 316 transitions. [2021-11-07 07:51:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 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) [2021-11-07 07:51:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 316 transitions. [2021-11-07 07:51:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-07 07:51:10,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:10,901 INFO L513 BasicCegarLoop]: trace histogram [138, 105, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:10,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:11,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-07 07:51:11,102 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:11,102 INFO L85 PathProgramCache]: Analyzing trace with hash 976612817, now seen corresponding path program 102 times [2021-11-07 07:51:11,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:11,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244951329] [2021-11-07 07:51:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:11,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 6890 proven. 11130 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 07:51:14,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:14,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244951329] [2021-11-07 07:51:14,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244951329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:14,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124368171] [2021-11-07 07:51:14,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:51:14,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:14,854 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:14,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-07 07:51:19,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 135 check-sat command(s) [2021-11-07 07:51:19,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:51:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19044 backedges. 7035 proven. 1089 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2021-11-07 07:51:22,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124368171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:22,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:22,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 36] total 142 [2021-11-07 07:51:22,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285942983] [2021-11-07 07:51:22,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-11-07 07:51:22,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-11-07 07:51:22,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2021-11-07 07:51:22,438 INFO L87 Difference]: Start difference. First operand 283 states and 316 transitions. Second operand has 142 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 142 states have internal predecessors, (291), 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) [2021-11-07 07:51:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:23,540 INFO L93 Difference]: Finished difference Result 359 states and 429 transitions. [2021-11-07 07:51:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-11-07 07:51:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 142 states have internal predecessors, (291), 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 282 [2021-11-07 07:51:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:23,542 INFO L225 Difference]: With dead ends: 359 [2021-11-07 07:51:23,542 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 07:51:23,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2021-11-07 07:51:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 07:51:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2021-11-07 07:51:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.1223776223776223) internal successors, (321), 286 states have internal predecessors, (321), 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) [2021-11-07 07:51:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 321 transitions. [2021-11-07 07:51:23,547 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 321 transitions. Word has length 282 [2021-11-07 07:51:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:23,547 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 321 transitions. [2021-11-07 07:51:23,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 142 states have internal predecessors, (291), 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) [2021-11-07 07:51:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 321 transitions. [2021-11-07 07:51:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-07 07:51:23,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:23,548 INFO L513 BasicCegarLoop]: trace histogram [140, 106, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:23,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-07 07:51:23,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:23,749 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1366064857, now seen corresponding path program 103 times [2021-11-07 07:51:23,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:23,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543283449] [2021-11-07 07:51:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:23,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19600 backedges. 7169 proven. 11342 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 07:51:27,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:27,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543283449] [2021-11-07 07:51:27,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543283449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:27,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905322522] [2021-11-07 07:51:27,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:27,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:27,576 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:27,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-07 07:51:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 07:51:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19600 backedges. 7169 proven. 11342 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 07:51:32,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905322522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:32,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 110 [2021-11-07 07:51:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757428734] [2021-11-07 07:51:32,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-11-07 07:51:32,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-11-07 07:51:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 07:51:32,526 INFO L87 Difference]: Start difference. First operand 287 states and 321 transitions. Second operand has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 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) [2021-11-07 07:51:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:32,769 INFO L93 Difference]: Finished difference Result 362 states and 431 transitions. [2021-11-07 07:51:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-07 07:51:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 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 286 [2021-11-07 07:51:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:32,770 INFO L225 Difference]: With dead ends: 362 [2021-11-07 07:51:32,770 INFO L226 Difference]: Without dead ends: 289 [2021-11-07 07:51:32,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 07:51:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-07 07:51:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-07 07:51:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.1215277777777777) internal successors, (323), 288 states have internal predecessors, (323), 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) [2021-11-07 07:51:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 323 transitions. [2021-11-07 07:51:32,776 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 323 transitions. Word has length 286 [2021-11-07 07:51:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:32,776 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 323 transitions. [2021-11-07 07:51:32,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 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) [2021-11-07 07:51:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 323 transitions. [2021-11-07 07:51:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-07 07:51:32,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:32,777 INFO L513 BasicCegarLoop]: trace histogram [141, 107, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:32,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-11-07 07:51:32,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-07 07:51:32,977 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash 491567356, now seen corresponding path program 104 times [2021-11-07 07:51:32,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:32,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889453825] [2021-11-07 07:51:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:32,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19881 backedges. 7236 proven. 11556 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 07:51:36,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:36,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889453825] [2021-11-07 07:51:36,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889453825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:36,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988381564] [2021-11-07 07:51:36,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:36,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:36,839 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:36,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-07 07:51:41,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:41,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-07 07:51:41,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 19881 backedges. 7236 proven. 11556 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 07:51:41,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988381564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:41,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:41,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2021-11-07 07:51:41,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823775336] [2021-11-07 07:51:41,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 07:51:41,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 07:51:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:51:41,889 INFO L87 Difference]: Start difference. First operand 289 states and 323 transitions. Second operand has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 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) [2021-11-07 07:51:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:42,173 INFO L93 Difference]: Finished difference Result 364 states and 433 transitions. [2021-11-07 07:51:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-07 07:51:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 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 288 [2021-11-07 07:51:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:42,174 INFO L225 Difference]: With dead ends: 364 [2021-11-07 07:51:42,174 INFO L226 Difference]: Without dead ends: 291 [2021-11-07 07:51:42,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:51:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-07 07:51:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2021-11-07 07:51:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1206896551724137) internal successors, (325), 290 states have internal predecessors, (325), 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) [2021-11-07 07:51:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 325 transitions. [2021-11-07 07:51:42,178 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 325 transitions. Word has length 288 [2021-11-07 07:51:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:42,178 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 325 transitions. [2021-11-07 07:51:42,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 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) [2021-11-07 07:51:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 325 transitions. [2021-11-07 07:51:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-07 07:51:42,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:42,179 INFO L513 BasicCegarLoop]: trace histogram [142, 108, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:42,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-11-07 07:51:42,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-07 07:51:42,380 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1913058911, now seen corresponding path program 105 times [2021-11-07 07:51:42,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:42,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547720177] [2021-11-07 07:51:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:42,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20164 backedges. 7303 proven. 11772 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 07:51:46,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:46,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547720177] [2021-11-07 07:51:46,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547720177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:46,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14694739] [2021-11-07 07:51:46,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:51:46,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:46,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:46,293 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:46,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-07 07:51:50,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-11-07 07:51:50,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:51:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20164 backedges. 7452 proven. 1156 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2021-11-07 07:51:54,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14694739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:54,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:54,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 37] total 146 [2021-11-07 07:51:54,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231350984] [2021-11-07 07:51:54,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-11-07 07:51:54,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-11-07 07:51:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2021-11-07 07:51:54,173 INFO L87 Difference]: Start difference. First operand 291 states and 325 transitions. Second operand has 146 states, 146 states have (on average 2.047945205479452) internal successors, (299), 146 states have internal predecessors, (299), 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) [2021-11-07 07:51:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:55,292 INFO L93 Difference]: Finished difference Result 369 states and 441 transitions. [2021-11-07 07:51:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-07 07:51:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.047945205479452) internal successors, (299), 146 states have internal predecessors, (299), 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 290 [2021-11-07 07:51:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:55,293 INFO L225 Difference]: With dead ends: 369 [2021-11-07 07:51:55,293 INFO L226 Difference]: Without dead ends: 296 [2021-11-07 07:51:55,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2021-11-07 07:51:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-07 07:51:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2021-11-07 07:51:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.1224489795918366) internal successors, (330), 294 states have internal predecessors, (330), 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) [2021-11-07 07:51:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 330 transitions. [2021-11-07 07:51:55,298 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 330 transitions. Word has length 290 [2021-11-07 07:51:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:55,298 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 330 transitions. [2021-11-07 07:51:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.047945205479452) internal successors, (299), 146 states have internal predecessors, (299), 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) [2021-11-07 07:51:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 330 transitions. [2021-11-07 07:51:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-07 07:51:55,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:55,299 INFO L513 BasicCegarLoop]: trace histogram [144, 109, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:55,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:55,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:55,500 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:55,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:55,500 INFO L85 PathProgramCache]: Analyzing trace with hash -670693145, now seen corresponding path program 106 times [2021-11-07 07:51:55,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:55,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16305251] [2021-11-07 07:51:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:55,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20736 backedges. 7590 proven. 11990 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 07:51:59,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:59,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16305251] [2021-11-07 07:51:59,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16305251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:59,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029305692] [2021-11-07 07:51:59,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:51:59,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:59,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:59,507 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:59,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-07 07:52:04,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:04,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-07 07:52:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20736 backedges. 7590 proven. 11990 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 07:52:04,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029305692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:04,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:04,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 113 [2021-11-07 07:52:04,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414396497] [2021-11-07 07:52:04,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-07 07:52:04,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-07 07:52:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:52:04,710 INFO L87 Difference]: Start difference. First operand 295 states and 330 transitions. Second operand has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 113 states have internal predecessors, (231), 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) [2021-11-07 07:52:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:04,932 INFO L93 Difference]: Finished difference Result 372 states and 443 transitions. [2021-11-07 07:52:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-07 07:52:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 113 states have internal predecessors, (231), 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 294 [2021-11-07 07:52:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:04,933 INFO L225 Difference]: With dead ends: 372 [2021-11-07 07:52:04,933 INFO L226 Difference]: Without dead ends: 297 [2021-11-07 07:52:04,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:52:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-07 07:52:04,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-11-07 07:52:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.1216216216216217) internal successors, (332), 296 states have internal predecessors, (332), 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) [2021-11-07 07:52:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 332 transitions. [2021-11-07 07:52:04,938 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 332 transitions. Word has length 294 [2021-11-07 07:52:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:04,938 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 332 transitions. [2021-11-07 07:52:04,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 113 states have internal predecessors, (231), 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) [2021-11-07 07:52:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 332 transitions. [2021-11-07 07:52:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-07 07:52:04,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:04,939 INFO L513 BasicCegarLoop]: trace histogram [145, 110, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:04,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-11-07 07:52:05,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:05,140 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1972932598, now seen corresponding path program 107 times [2021-11-07 07:52:05,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:05,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740187081] [2021-11-07 07:52:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:05,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21025 backedges. 7659 proven. 12210 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 07:52:09,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:09,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740187081] [2021-11-07 07:52:09,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740187081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:09,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922483132] [2021-11-07 07:52:09,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:52:09,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:09,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:09,261 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:09,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-07 07:52:14,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 146 check-sat command(s) [2021-11-07 07:52:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-07 07:52:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21025 backedges. 7659 proven. 12210 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 07:52:14,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922483132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:14,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:14,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 114 [2021-11-07 07:52:14,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207960322] [2021-11-07 07:52:14,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-07 07:52:14,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-07 07:52:14,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:52:14,656 INFO L87 Difference]: Start difference. First operand 297 states and 332 transitions. Second operand has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 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) [2021-11-07 07:52:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:14,885 INFO L93 Difference]: Finished difference Result 374 states and 445 transitions. [2021-11-07 07:52:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-07 07:52:14,885 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 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 296 [2021-11-07 07:52:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:14,886 INFO L225 Difference]: With dead ends: 374 [2021-11-07 07:52:14,886 INFO L226 Difference]: Without dead ends: 299 [2021-11-07 07:52:14,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:52:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-07 07:52:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2021-11-07 07:52:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.1208053691275168) internal successors, (334), 298 states have internal predecessors, (334), 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) [2021-11-07 07:52:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 334 transitions. [2021-11-07 07:52:14,891 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 334 transitions. Word has length 296 [2021-11-07 07:52:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:14,891 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 334 transitions. [2021-11-07 07:52:14,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 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) [2021-11-07 07:52:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 334 transitions. [2021-11-07 07:52:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-07 07:52:14,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:14,892 INFO L513 BasicCegarLoop]: trace histogram [146, 111, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:14,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-11-07 07:52:15,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:15,093 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash 705403501, now seen corresponding path program 108 times [2021-11-07 07:52:15,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:15,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352948672] [2021-11-07 07:52:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:15,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 7728 proven. 12432 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 07:52:19,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:19,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352948672] [2021-11-07 07:52:19,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352948672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:19,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805910938] [2021-11-07 07:52:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:52:19,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:19,247 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:19,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-07 07:52:24,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 143 check-sat command(s) [2021-11-07 07:52:24,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:52:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 7881 proven. 1225 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2021-11-07 07:52:27,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805910938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:27,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:27,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 38] total 150 [2021-11-07 07:52:27,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261690572] [2021-11-07 07:52:27,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-11-07 07:52:27,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-11-07 07:52:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2021-11-07 07:52:27,718 INFO L87 Difference]: Start difference. First operand 299 states and 334 transitions. Second operand has 150 states, 150 states have (on average 2.046666666666667) internal successors, (307), 150 states have internal predecessors, (307), 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) [2021-11-07 07:52:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:29,239 INFO L93 Difference]: Finished difference Result 379 states and 453 transitions. [2021-11-07 07:52:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-11-07 07:52:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.046666666666667) internal successors, (307), 150 states have internal predecessors, (307), 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 298 [2021-11-07 07:52:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:29,240 INFO L225 Difference]: With dead ends: 379 [2021-11-07 07:52:29,240 INFO L226 Difference]: Without dead ends: 304 [2021-11-07 07:52:29,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2021-11-07 07:52:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-07 07:52:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2021-11-07 07:52:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.1225165562913908) internal successors, (339), 302 states have internal predecessors, (339), 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) [2021-11-07 07:52:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 339 transitions. [2021-11-07 07:52:29,245 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 339 transitions. Word has length 298 [2021-11-07 07:52:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:29,245 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 339 transitions. [2021-11-07 07:52:29,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.046666666666667) internal successors, (307), 150 states have internal predecessors, (307), 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) [2021-11-07 07:52:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 339 transitions. [2021-11-07 07:52:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-07 07:52:29,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:29,247 INFO L513 BasicCegarLoop]: trace histogram [148, 112, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:29,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-07 07:52:29,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-07 07:52:29,449 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1537035893, now seen corresponding path program 109 times [2021-11-07 07:52:29,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:29,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283394499] [2021-11-07 07:52:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:29,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21904 backedges. 8023 proven. 12656 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 07:52:33,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:33,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283394499] [2021-11-07 07:52:33,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283394499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:33,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294455874] [2021-11-07 07:52:33,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:52:33,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:33,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:33,704 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:33,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-07 07:52:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-07 07:52:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21904 backedges. 8023 proven. 12656 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 07:52:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294455874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:39,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 116 [2021-11-07 07:52:39,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339779499] [2021-11-07 07:52:39,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-07 07:52:39,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-07 07:52:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 07:52:39,151 INFO L87 Difference]: Start difference. First operand 303 states and 339 transitions. Second operand has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 116 states have internal predecessors, (237), 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) [2021-11-07 07:52:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:39,386 INFO L93 Difference]: Finished difference Result 382 states and 455 transitions. [2021-11-07 07:52:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-07 07:52:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 116 states have internal predecessors, (237), 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 302 [2021-11-07 07:52:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:39,387 INFO L225 Difference]: With dead ends: 382 [2021-11-07 07:52:39,387 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 07:52:39,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 07:52:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 07:52:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-11-07 07:52:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1217105263157894) internal successors, (341), 304 states have internal predecessors, (341), 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) [2021-11-07 07:52:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 341 transitions. [2021-11-07 07:52:39,392 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 341 transitions. Word has length 302 [2021-11-07 07:52:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:39,392 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 341 transitions. [2021-11-07 07:52:39,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 116 states have internal predecessors, (237), 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) [2021-11-07 07:52:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 341 transitions. [2021-11-07 07:52:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-07 07:52:39,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:39,393 INFO L513 BasicCegarLoop]: trace histogram [149, 113, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:39,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-07 07:52:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-07 07:52:39,593 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -352132456, now seen corresponding path program 110 times [2021-11-07 07:52:39,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:39,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994398856] [2021-11-07 07:52:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:39,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22201 backedges. 8094 proven. 12882 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 07:52:43,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:43,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994398856] [2021-11-07 07:52:43,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994398856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:43,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627314850] [2021-11-07 07:52:43,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:52:43,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:43,867 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:43,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-07 07:52:48,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:52:48,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-07 07:52:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22201 backedges. 8094 proven. 12882 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 07:52:49,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627314850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:49,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:49,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2021-11-07 07:52:49,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291197771] [2021-11-07 07:52:49,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-07 07:52:49,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-07 07:52:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:52:49,591 INFO L87 Difference]: Start difference. First operand 305 states and 341 transitions. Second operand has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 117 states have internal predecessors, (239), 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) [2021-11-07 07:52:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:49,848 INFO L93 Difference]: Finished difference Result 384 states and 457 transitions. [2021-11-07 07:52:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-07 07:52:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 117 states have internal predecessors, (239), 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 304 [2021-11-07 07:52:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:49,849 INFO L225 Difference]: With dead ends: 384 [2021-11-07 07:52:49,849 INFO L226 Difference]: Without dead ends: 307 [2021-11-07 07:52:49,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:52:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-07 07:52:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-07 07:52:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1209150326797386) internal successors, (343), 306 states have internal predecessors, (343), 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) [2021-11-07 07:52:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 343 transitions. [2021-11-07 07:52:49,855 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 343 transitions. Word has length 304 [2021-11-07 07:52:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:49,855 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 343 transitions. [2021-11-07 07:52:49,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 117 states have internal predecessors, (239), 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) [2021-11-07 07:52:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 343 transitions. [2021-11-07 07:52:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-07 07:52:49,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:49,856 INFO L513 BasicCegarLoop]: trace histogram [150, 114, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:49,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-11-07 07:52:50,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:50,057 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:50,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash 928250363, now seen corresponding path program 111 times [2021-11-07 07:52:50,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:50,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284994576] [2021-11-07 07:52:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:50,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 8165 proven. 13110 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 07:52:54,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:54,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284994576] [2021-11-07 07:52:54,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284994576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:54,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375577342] [2021-11-07 07:52:54,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:52:54,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:54,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:54,448 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:54,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-07 07:52:59,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2021-11-07 07:52:59,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:59,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:52:59,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 8322 proven. 1296 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2021-11-07 07:53:03,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375577342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:03,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:03,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 39] total 154 [2021-11-07 07:53:03,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947675006] [2021-11-07 07:53:03,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-11-07 07:53:03,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-11-07 07:53:03,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2021-11-07 07:53:03,262 INFO L87 Difference]: Start difference. First operand 307 states and 343 transitions. Second operand has 154 states, 154 states have (on average 2.0454545454545454) internal successors, (315), 154 states have internal predecessors, (315), 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) [2021-11-07 07:53:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:04,853 INFO L93 Difference]: Finished difference Result 389 states and 465 transitions. [2021-11-07 07:53:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-11-07 07:53:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0454545454545454) internal successors, (315), 154 states have internal predecessors, (315), 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 306 [2021-11-07 07:53:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:04,854 INFO L225 Difference]: With dead ends: 389 [2021-11-07 07:53:04,854 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 07:53:04,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2021-11-07 07:53:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 07:53:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2021-11-07 07:53:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.1225806451612903) internal successors, (348), 310 states have internal predecessors, (348), 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) [2021-11-07 07:53:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 348 transitions. [2021-11-07 07:53:04,861 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 348 transitions. Word has length 306 [2021-11-07 07:53:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:04,861 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 348 transitions. [2021-11-07 07:53:04,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0454545454545454) internal successors, (315), 154 states have internal predecessors, (315), 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) [2021-11-07 07:53:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 348 transitions. [2021-11-07 07:53:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-07 07:53:04,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:04,863 INFO L513 BasicCegarLoop]: trace histogram [152, 115, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:04,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-07 07:53:05,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-07 07:53:05,064 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1162186877, now seen corresponding path program 112 times [2021-11-07 07:53:05,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:05,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900734970] [2021-11-07 07:53:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:05,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23104 backedges. 8468 proven. 13340 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 07:53:09,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:09,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900734970] [2021-11-07 07:53:09,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900734970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:09,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148381791] [2021-11-07 07:53:09,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:53:09,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:09,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:09,616 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:09,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-07 07:53:14,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:53:14,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-07 07:53:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 23104 backedges. 8468 proven. 13340 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 07:53:15,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148381791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:15,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:15,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 119 [2021-11-07 07:53:15,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109804802] [2021-11-07 07:53:15,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-07 07:53:15,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-07 07:53:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:53:15,576 INFO L87 Difference]: Start difference. First operand 311 states and 348 transitions. Second operand has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 119 states have internal predecessors, (243), 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) [2021-11-07 07:53:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:15,846 INFO L93 Difference]: Finished difference Result 392 states and 467 transitions. [2021-11-07 07:53:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-07 07:53:15,846 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 119 states have internal predecessors, (243), 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 310 [2021-11-07 07:53:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:15,847 INFO L225 Difference]: With dead ends: 392 [2021-11-07 07:53:15,847 INFO L226 Difference]: Without dead ends: 313 [2021-11-07 07:53:15,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:53:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-07 07:53:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-11-07 07:53:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.1217948717948718) internal successors, (350), 312 states have internal predecessors, (350), 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) [2021-11-07 07:53:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 350 transitions. [2021-11-07 07:53:15,851 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 350 transitions. Word has length 310 [2021-11-07 07:53:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:15,852 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 350 transitions. [2021-11-07 07:53:15,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 119 states have internal predecessors, (243), 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) [2021-11-07 07:53:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 350 transitions. [2021-11-07 07:53:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-07 07:53:15,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:15,853 INFO L513 BasicCegarLoop]: trace histogram [153, 116, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:15,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-07 07:53:16,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:16,057 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash -358141786, now seen corresponding path program 113 times [2021-11-07 07:53:16,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:16,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650076543] [2021-11-07 07:53:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:16,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23409 backedges. 8541 proven. 13572 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 07:53:20,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:20,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650076543] [2021-11-07 07:53:20,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650076543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:20,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137744372] [2021-11-07 07:53:20,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:53:20,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:20,578 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:20,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-07 07:53:25,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 154 check-sat command(s) [2021-11-07 07:53:25,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:25,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-07 07:53:25,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 23409 backedges. 8541 proven. 13572 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 07:53:26,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137744372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:26,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:26,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 120 [2021-11-07 07:53:26,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075125460] [2021-11-07 07:53:26,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-07 07:53:26,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-07 07:53:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 07:53:26,625 INFO L87 Difference]: Start difference. First operand 313 states and 350 transitions. Second operand has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 120 states have internal predecessors, (245), 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) [2021-11-07 07:53:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:26,888 INFO L93 Difference]: Finished difference Result 394 states and 469 transitions. [2021-11-07 07:53:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-07 07:53:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 120 states have internal predecessors, (245), 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 312 [2021-11-07 07:53:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:26,889 INFO L225 Difference]: With dead ends: 394 [2021-11-07 07:53:26,889 INFO L226 Difference]: Without dead ends: 315 [2021-11-07 07:53:26,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 07:53:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-07 07:53:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-07 07:53:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.1210191082802548) internal successors, (352), 314 states have internal predecessors, (352), 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) [2021-11-07 07:53:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 352 transitions. [2021-11-07 07:53:26,894 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 352 transitions. Word has length 312 [2021-11-07 07:53:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:26,895 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 352 transitions. [2021-11-07 07:53:26,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 120 states have internal predecessors, (245), 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) [2021-11-07 07:53:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 352 transitions. [2021-11-07 07:53:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-07 07:53:26,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:26,896 INFO L513 BasicCegarLoop]: trace histogram [154, 117, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:26,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-11-07 07:53:27,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-07 07:53:27,096 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash -764922615, now seen corresponding path program 114 times [2021-11-07 07:53:27,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:27,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803398865] [2021-11-07 07:53:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:27,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23716 backedges. 8614 proven. 13806 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 07:53:31,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:31,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803398865] [2021-11-07 07:53:31,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803398865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:31,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075519878] [2021-11-07 07:53:31,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:53:31,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:31,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:31,725 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:31,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-07 07:53:37,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 151 check-sat command(s) [2021-11-07 07:53:37,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:53:37,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23716 backedges. 8775 proven. 1369 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2021-11-07 07:53:41,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075519878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:41,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:41,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 40] total 158 [2021-11-07 07:53:41,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445149194] [2021-11-07 07:53:41,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-11-07 07:53:41,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-11-07 07:53:41,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2021-11-07 07:53:41,146 INFO L87 Difference]: Start difference. First operand 315 states and 352 transitions. Second operand has 158 states, 158 states have (on average 2.0443037974683542) internal successors, (323), 158 states have internal predecessors, (323), 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) [2021-11-07 07:53:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:42,688 INFO L93 Difference]: Finished difference Result 399 states and 477 transitions. [2021-11-07 07:53:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-11-07 07:53:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0443037974683542) internal successors, (323), 158 states have internal predecessors, (323), 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 314 [2021-11-07 07:53:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:42,689 INFO L225 Difference]: With dead ends: 399 [2021-11-07 07:53:42,689 INFO L226 Difference]: Without dead ends: 320 [2021-11-07 07:53:42,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2021-11-07 07:53:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-07 07:53:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2021-11-07 07:53:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.1226415094339623) internal successors, (357), 318 states have internal predecessors, (357), 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) [2021-11-07 07:53:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 357 transitions. [2021-11-07 07:53:42,694 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 357 transitions. Word has length 314 [2021-11-07 07:53:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:42,694 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 357 transitions. [2021-11-07 07:53:42,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0443037974683542) internal successors, (323), 158 states have internal predecessors, (323), 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) [2021-11-07 07:53:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 357 transitions. [2021-11-07 07:53:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-07 07:53:42,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:42,696 INFO L513 BasicCegarLoop]: trace histogram [156, 118, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:42,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-07 07:53:42,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-11-07 07:53:42,897 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:42,898 INFO L85 PathProgramCache]: Analyzing trace with hash 962432017, now seen corresponding path program 115 times [2021-11-07 07:53:42,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:42,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231879033] [2021-11-07 07:53:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:42,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24336 backedges. 8925 proven. 14042 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 07:53:47,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:47,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231879033] [2021-11-07 07:53:47,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231879033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:47,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021529247] [2021-11-07 07:53:47,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:53:47,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:47,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:47,554 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:47,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-07 07:53:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-07 07:53:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24336 backedges. 8925 proven. 14042 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 07:53:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021529247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:53,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:53,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 122 [2021-11-07 07:53:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136503145] [2021-11-07 07:53:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-07 07:53:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-07 07:53:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:53:53,734 INFO L87 Difference]: Start difference. First operand 319 states and 357 transitions. Second operand has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 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) [2021-11-07 07:53:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:54,004 INFO L93 Difference]: Finished difference Result 402 states and 479 transitions. [2021-11-07 07:53:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-07 07:53:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 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 318 [2021-11-07 07:53:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:54,005 INFO L225 Difference]: With dead ends: 402 [2021-11-07 07:53:54,005 INFO L226 Difference]: Without dead ends: 321 [2021-11-07 07:53:54,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:53:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-07 07:53:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2021-11-07 07:53:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.121875) internal successors, (359), 320 states have internal predecessors, (359), 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) [2021-11-07 07:53:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 359 transitions. [2021-11-07 07:53:54,011 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 359 transitions. Word has length 318 [2021-11-07 07:53:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:54,011 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 359 transitions. [2021-11-07 07:53:54,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 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) [2021-11-07 07:53:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 359 transitions. [2021-11-07 07:53:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-07 07:53:54,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:54,012 INFO L513 BasicCegarLoop]: trace histogram [157, 119, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:54,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-11-07 07:53:54,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:54,213 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1705739724, now seen corresponding path program 116 times [2021-11-07 07:53:54,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:54,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567455530] [2021-11-07 07:53:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:54,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24649 backedges. 9000 proven. 14280 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 07:53:58,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:58,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567455530] [2021-11-07 07:53:58,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567455530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:58,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226030270] [2021-11-07 07:53:58,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:53:58,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:58,970 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:58,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-07 07:54:04,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:54:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:04,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-07 07:54:04,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24649 backedges. 9000 proven. 14280 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 07:54:05,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226030270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:05,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:05,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 123 [2021-11-07 07:54:05,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286285166] [2021-11-07 07:54:05,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-07 07:54:05,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:05,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-07 07:54:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:54:05,206 INFO L87 Difference]: Start difference. First operand 321 states and 359 transitions. Second operand has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 123 states have internal predecessors, (251), 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) [2021-11-07 07:54:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:05,494 INFO L93 Difference]: Finished difference Result 404 states and 481 transitions. [2021-11-07 07:54:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-07 07:54:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 123 states have internal predecessors, (251), 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 320 [2021-11-07 07:54:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:05,497 INFO L225 Difference]: With dead ends: 404 [2021-11-07 07:54:05,497 INFO L226 Difference]: Without dead ends: 323 [2021-11-07 07:54:05,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:54:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-07 07:54:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-07 07:54:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.1211180124223603) internal successors, (361), 322 states have internal predecessors, (361), 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) [2021-11-07 07:54:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 361 transitions. [2021-11-07 07:54:05,503 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 361 transitions. Word has length 320 [2021-11-07 07:54:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 361 transitions. [2021-11-07 07:54:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 123 states have internal predecessors, (251), 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) [2021-11-07 07:54:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 361 transitions. [2021-11-07 07:54:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-07 07:54:05,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:05,505 INFO L513 BasicCegarLoop]: trace histogram [158, 120, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:05,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-11-07 07:54:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:05,705 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1723307113, now seen corresponding path program 117 times [2021-11-07 07:54:05,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:05,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058283186] [2021-11-07 07:54:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:05,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24964 backedges. 9075 proven. 14520 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 07:54:10,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:10,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058283186] [2021-11-07 07:54:10,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058283186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:10,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734626130] [2021-11-07 07:54:10,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:54:10,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:10,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:10,607 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:10,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-07 07:54:16,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2021-11-07 07:54:16,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:54:16,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24964 backedges. 9240 proven. 1444 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2021-11-07 07:54:20,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734626130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:20,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:20,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 41] total 162 [2021-11-07 07:54:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72184637] [2021-11-07 07:54:20,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-11-07 07:54:20,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-11-07 07:54:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2021-11-07 07:54:20,253 INFO L87 Difference]: Start difference. First operand 323 states and 361 transitions. Second operand has 162 states, 162 states have (on average 2.04320987654321) internal successors, (331), 162 states have internal predecessors, (331), 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) [2021-11-07 07:54:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:21,973 INFO L93 Difference]: Finished difference Result 409 states and 489 transitions. [2021-11-07 07:54:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-07 07:54:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.04320987654321) internal successors, (331), 162 states have internal predecessors, (331), 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 322 [2021-11-07 07:54:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:21,974 INFO L225 Difference]: With dead ends: 409 [2021-11-07 07:54:21,974 INFO L226 Difference]: Without dead ends: 328 [2021-11-07 07:54:21,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2021-11-07 07:54:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-07 07:54:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2021-11-07 07:54:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.1226993865030674) internal successors, (366), 326 states have internal predecessors, (366), 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) [2021-11-07 07:54:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 366 transitions. [2021-11-07 07:54:21,979 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 366 transitions. Word has length 322 [2021-11-07 07:54:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:21,980 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 366 transitions. [2021-11-07 07:54:21,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.04320987654321) internal successors, (331), 162 states have internal predecessors, (331), 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) [2021-11-07 07:54:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 366 transitions. [2021-11-07 07:54:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-07 07:54:21,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:21,981 INFO L513 BasicCegarLoop]: trace histogram [160, 121, 39, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:22,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-11-07 07:54:22,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:22,181 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash 50250783, now seen corresponding path program 118 times [2021-11-07 07:54:22,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:22,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025900833] [2021-11-07 07:54:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:22,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25600 backedges. 9394 proven. 14762 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2021-11-07 07:54:27,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:27,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025900833] [2021-11-07 07:54:27,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025900833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:27,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137004462] [2021-11-07 07:54:27,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:54:27,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:27,071 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:27,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-07 07:54:32,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:54:32,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:32,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-07 07:54:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25600 backedges. 9394 proven. 14762 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2021-11-07 07:54:33,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137004462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:33,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:33,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 125 [2021-11-07 07:54:33,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723100115] [2021-11-07 07:54:33,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-07 07:54:33,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-07 07:54:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 07:54:33,447 INFO L87 Difference]: Start difference. First operand 327 states and 366 transitions. Second operand has 125 states, 125 states have (on average 2.04) internal successors, (255), 125 states have internal predecessors, (255), 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) [2021-11-07 07:54:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:33,729 INFO L93 Difference]: Finished difference Result 412 states and 491 transitions. [2021-11-07 07:54:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-07 07:54:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 125 states have internal predecessors, (255), 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 326 [2021-11-07 07:54:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:33,730 INFO L225 Difference]: With dead ends: 412 [2021-11-07 07:54:33,730 INFO L226 Difference]: Without dead ends: 329 [2021-11-07 07:54:33,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 07:54:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-07 07:54:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-11-07 07:54:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.1219512195121952) internal successors, (368), 328 states have internal predecessors, (368), 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) [2021-11-07 07:54:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 368 transitions. [2021-11-07 07:54:33,736 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 368 transitions. Word has length 326 [2021-11-07 07:54:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:33,736 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 368 transitions. [2021-11-07 07:54:33,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 125 states have internal predecessors, (255), 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) [2021-11-07 07:54:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 368 transitions. [2021-11-07 07:54:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-07 07:54:33,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:33,737 INFO L513 BasicCegarLoop]: trace histogram [161, 122, 39, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:33,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-11-07 07:54:33,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:33,938 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash -226304190, now seen corresponding path program 119 times [2021-11-07 07:54:33,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:33,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932630468] [2021-11-07 07:54:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:33,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25921 backedges. 9471 proven. 15006 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2021-11-07 07:54:38,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:38,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932630468] [2021-11-07 07:54:38,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932630468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:38,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477916698] [2021-11-07 07:54:38,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:54:38,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:38,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:38,981 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:38,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-07 07:54:44,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 162 check-sat command(s) [2021-11-07 07:54:44,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-07 07:54:44,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25921 backedges. 9471 proven. 15006 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2021-11-07 07:54:45,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477916698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:45,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:45,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 126 [2021-11-07 07:54:45,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050807784] [2021-11-07 07:54:45,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-07 07:54:45,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:45,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-07 07:54:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:54:45,604 INFO L87 Difference]: Start difference. First operand 329 states and 368 transitions. Second operand has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 126 states have internal predecessors, (257), 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) [2021-11-07 07:54:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:45,897 INFO L93 Difference]: Finished difference Result 414 states and 493 transitions. [2021-11-07 07:54:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-07 07:54:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 126 states have internal predecessors, (257), 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 328 [2021-11-07 07:54:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:45,898 INFO L225 Difference]: With dead ends: 414 [2021-11-07 07:54:45,898 INFO L226 Difference]: Without dead ends: 331 [2021-11-07 07:54:45,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:54:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-07 07:54:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2021-11-07 07:54:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.121212121212121) internal successors, (370), 330 states have internal predecessors, (370), 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) [2021-11-07 07:54:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 370 transitions. [2021-11-07 07:54:45,904 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 370 transitions. Word has length 328 [2021-11-07 07:54:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:45,904 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 370 transitions. [2021-11-07 07:54:45,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 126 states have internal predecessors, (257), 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) [2021-11-07 07:54:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 370 transitions. [2021-11-07 07:54:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-07 07:54:45,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:45,905 INFO L513 BasicCegarLoop]: trace histogram [162, 123, 39, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:45,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-11-07 07:54:46,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2521b5ec-812c-4283-b801-c0606143b8ab/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:46,106 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 292339109, now seen corresponding path program 120 times [2021-11-07 07:54:46,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:46,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667998063] [2021-11-07 07:54:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:46,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat