./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:20:10,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:20:10,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:20:10,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:20:10,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:20:10,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:20:10,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:20:10,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:20:10,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:20:10,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:20:10,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:20:10,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:20:10,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:20:10,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:20:10,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:20:10,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:20:10,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:20:10,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:20:10,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:20:10,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:20:10,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:20:10,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:20:10,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:20:10,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:20:10,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:20:10,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:20:10,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:20:10,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:20:10,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:20:10,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:20:10,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:20:10,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:20:10,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:20:10,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:20:10,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:20:10,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:20:10,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:20:10,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:20:10,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:20:10,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:20:10,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:20:10,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:20:10,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:20:10,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:20:10,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:20:10,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:20:10,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:20:10,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:20:10,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:20:10,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:20:10,123 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:20:10,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:20:10,123 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:20:10,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:20:10,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:20:10,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:20:10,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:20:10,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:20:10,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:20:10,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:20:10,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:20:10,125 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:20:10,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:20:10,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:20:10,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:20:10,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:20:10,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:20:10,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:20:10,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:20:10,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:20:10,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:20:10,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:20:10,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:20:10,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:20:10,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:20:10,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:20:10,128 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_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-12-06 18:20:10,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:20:10,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:20:10,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:20:10,336 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:20:10,336 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:20:10,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-12-06 18:20:10,379 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/data/9ed4cbc70/1e2c2b799c0245ff8c85b7598544eb29/FLAG9d9b292b5 [2021-12-06 18:20:10,886 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:20:10,887 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-12-06 18:20:10,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/data/9ed4cbc70/1e2c2b799c0245ff8c85b7598544eb29/FLAG9d9b292b5 [2021-12-06 18:20:11,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/data/9ed4cbc70/1e2c2b799c0245ff8c85b7598544eb29 [2021-12-06 18:20:11,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:20:11,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:20:11,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:20:11,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:20:11,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:20:11,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:11,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416306b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11, skipping insertion in model container [2021-12-06 18:20:11,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:11,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:20:11,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:20:11,580 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-12-06 18:20:11,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:20:11,839 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:20:11,852 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-12-06 18:20:11,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:20:11,975 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:20:11,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11 WrapperNode [2021-12-06 18:20:11,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:20:11,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:20:11,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:20:11,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:20:11,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,052 INFO L137 Inliner]: procedures = 88, calls = 329, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 743 [2021-12-06 18:20:12,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:20:12,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:20:12,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:20:12,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:20:12,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:20:12,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:20:12,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:20:12,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:20:12,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (1/1) ... [2021-12-06 18:20:12,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:20:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:12,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:20:12,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:20:12,205 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-06 18:20:12,206 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-06 18:20:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:20:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-06 18:20:12,206 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-06 18:20:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-06 18:20:12,206 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-06 18:20:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-06 18:20:12,206 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-06 18:20:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-06 18:20:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-06 18:20:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-06 18:20:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-06 18:20:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-06 18:20:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-06 18:20:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-06 18:20:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-06 18:20:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-06 18:20:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-06 18:20:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-06 18:20:12,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-06 18:20:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-06 18:20:12,209 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-06 18:20:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-06 18:20:12,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-06 18:20:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-06 18:20:12,209 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-06 18:20:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-06 18:20:12,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-06 18:20:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-06 18:20:12,209 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-06 18:20:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-06 18:20:12,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-06 18:20:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-06 18:20:12,210 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-06 18:20:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:20:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-06 18:20:12,210 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-06 18:20:12,210 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-06 18:20:12,210 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-06 18:20:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-06 18:20:12,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-06 18:20:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:20:12,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:20:12,211 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-06 18:20:12,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-06 18:20:12,328 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:20:12,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:20:12,906 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:20:12,921 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:20:12,921 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 18:20:12,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:20:12 BoogieIcfgContainer [2021-12-06 18:20:12,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:20:12,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:20:12,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:20:12,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:20:12,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:20:11" (1/3) ... [2021-12-06 18:20:12,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc88933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:20:12, skipping insertion in model container [2021-12-06 18:20:12,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:11" (2/3) ... [2021-12-06 18:20:12,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc88933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:20:12, skipping insertion in model container [2021-12-06 18:20:12,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:20:12" (3/3) ... [2021-12-06 18:20:12,934 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2021-12-06 18:20:12,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:20:12,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:20:12,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:20:12,980 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:20:12,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:20:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-06 18:20:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:20:13,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:13,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:13,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash 775009711, now seen corresponding path program 1 times [2021-12-06 18:20:13,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:13,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957936173] [2021-12-06 18:20:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:13,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:20:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:20:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:20:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:20:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:13,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:13,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957936173] [2021-12-06 18:20:13,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957936173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:13,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786188246] [2021-12-06 18:20:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:13,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:13,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:13,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:13,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:20:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:20:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:20:14,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:14,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786188246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:14,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:14,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-12-06 18:20:14,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500759206] [2021-12-06 18:20:14,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:14,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:20:14,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:14,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:20:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:14,122 INFO L87 Difference]: Start difference. First operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 18:20:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:14,186 INFO L93 Difference]: Finished difference Result 545 states and 913 transitions. [2021-12-06 18:20:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:20:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-12-06 18:20:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:14,207 INFO L225 Difference]: With dead ends: 545 [2021-12-06 18:20:14,207 INFO L226 Difference]: Without dead ends: 516 [2021-12-06 18:20:14,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:14,214 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:14,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-06 18:20:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-12-06 18:20:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.70935960591133) internal successors, (694), 425 states have internal predecessors, (694), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-06 18:20:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 867 transitions. [2021-12-06 18:20:14,297 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 867 transitions. Word has length 97 [2021-12-06 18:20:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:14,300 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 867 transitions. [2021-12-06 18:20:14,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 18:20:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 867 transitions. [2021-12-06 18:20:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 18:20:14,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:14,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:14,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:20:14,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 18:20:14,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1728523875, now seen corresponding path program 1 times [2021-12-06 18:20:14,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:14,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677033594] [2021-12-06 18:20:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:14,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:20:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 18:20:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 18:20:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:20:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:14,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:14,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677033594] [2021-12-06 18:20:14,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677033594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:14,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489430307] [2021-12-06 18:20:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:14,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:14,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:14,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:14,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:20:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:15,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:15,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:15,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489430307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:15,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:15,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:15,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180854098] [2021-12-06 18:20:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:15,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:15,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:15,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:15,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:15,179 INFO L87 Difference]: Start difference. First operand 516 states and 867 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:15,246 INFO L93 Difference]: Finished difference Result 1023 states and 1726 transitions. [2021-12-06 18:20:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:15,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-12-06 18:20:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:15,250 INFO L225 Difference]: With dead ends: 1023 [2021-12-06 18:20:15,250 INFO L226 Difference]: Without dead ends: 516 [2021-12-06 18:20:15,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:15,257 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 14 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:15,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2552 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-06 18:20:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-12-06 18:20:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.706896551724138) internal successors, (693), 425 states have internal predecessors, (693), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-06 18:20:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 866 transitions. [2021-12-06 18:20:15,284 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 866 transitions. Word has length 99 [2021-12-06 18:20:15,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:15,284 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 866 transitions. [2021-12-06 18:20:15,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 866 transitions. [2021-12-06 18:20:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 18:20:15,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:15,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:15,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:20:15,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 18:20:15,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash -826883435, now seen corresponding path program 1 times [2021-12-06 18:20:15,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:15,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890019968] [2021-12-06 18:20:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:15,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:20:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:20:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:15,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890019968] [2021-12-06 18:20:15,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890019968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360475123] [2021-12-06 18:20:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:15,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:15,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:15,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:15,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:20:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:16,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:16,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360475123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:16,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:16,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:16,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275142042] [2021-12-06 18:20:16,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:16,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:16,105 INFO L87 Difference]: Start difference. First operand 516 states and 866 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:16,151 INFO L93 Difference]: Finished difference Result 1023 states and 1724 transitions. [2021-12-06 18:20:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-06 18:20:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:16,155 INFO L225 Difference]: With dead ends: 1023 [2021-12-06 18:20:16,156 INFO L226 Difference]: Without dead ends: 516 [2021-12-06 18:20:16,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:16,159 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 12 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:16,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2552 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-06 18:20:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-12-06 18:20:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.7044334975369457) internal successors, (692), 425 states have internal predecessors, (692), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-06 18:20:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 865 transitions. [2021-12-06 18:20:16,180 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 865 transitions. Word has length 101 [2021-12-06 18:20:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:16,180 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 865 transitions. [2021-12-06 18:20:16,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 865 transitions. [2021-12-06 18:20:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 18:20:16,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:16,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:16,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:20:16,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:16,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash 834246499, now seen corresponding path program 1 times [2021-12-06 18:20:16,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:16,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36612896] [2021-12-06 18:20:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:16,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 18:20:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:20:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:16,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:16,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36612896] [2021-12-06 18:20:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36612896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295395772] [2021-12-06 18:20:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:16,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:16,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:16,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:20:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:17,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:17,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295395772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:17,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:17,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:17,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887207488] [2021-12-06 18:20:17,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:17,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:17,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:17,090 INFO L87 Difference]: Start difference. First operand 516 states and 865 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:17,142 INFO L93 Difference]: Finished difference Result 1030 states and 1731 transitions. [2021-12-06 18:20:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-12-06 18:20:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:17,147 INFO L225 Difference]: With dead ends: 1030 [2021-12-06 18:20:17,147 INFO L226 Difference]: Without dead ends: 525 [2021-12-06 18:20:17,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:17,150 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 20 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:17,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2552 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-06 18:20:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-12-06 18:20:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 414 states have (on average 1.7004830917874396) internal successors, (704), 433 states have internal predecessors, (704), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-06 18:20:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 877 transitions. [2021-12-06 18:20:17,175 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 877 transitions. Word has length 103 [2021-12-06 18:20:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:17,175 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 877 transitions. [2021-12-06 18:20:17,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 877 transitions. [2021-12-06 18:20:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 18:20:17,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:17,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:17,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:20:17,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:17,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1162426420, now seen corresponding path program 1 times [2021-12-06 18:20:17,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:17,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811887499] [2021-12-06 18:20:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:17,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:20:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:20:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 18:20:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:17,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811887499] [2021-12-06 18:20:17,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811887499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115339465] [2021-12-06 18:20:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:17,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:17,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:17,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:20:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:17,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:17,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115339465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:17,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:17,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:17,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549313735] [2021-12-06 18:20:17,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:17,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:17,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:17,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:17,978 INFO L87 Difference]: Start difference. First operand 525 states and 877 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:18,038 INFO L93 Difference]: Finished difference Result 1032 states and 1732 transitions. [2021-12-06 18:20:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-12-06 18:20:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:18,043 INFO L225 Difference]: With dead ends: 1032 [2021-12-06 18:20:18,044 INFO L226 Difference]: Without dead ends: 525 [2021-12-06 18:20:18,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:18,048 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 18 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:18,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2552 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-06 18:20:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-12-06 18:20:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 414 states have (on average 1.6980676328502415) internal successors, (703), 433 states have internal predecessors, (703), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-06 18:20:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 876 transitions. [2021-12-06 18:20:18,072 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 876 transitions. Word has length 104 [2021-12-06 18:20:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:18,073 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 876 transitions. [2021-12-06 18:20:18,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 876 transitions. [2021-12-06 18:20:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 18:20:18,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:18,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:18,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:20:18,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:18,278 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash -176244601, now seen corresponding path program 1 times [2021-12-06 18:20:18,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:18,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618809930] [2021-12-06 18:20:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:18,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:20:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:20:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:18,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618809930] [2021-12-06 18:20:18,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618809930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610984616] [2021-12-06 18:20:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:18,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:18,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:18,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:20:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:18,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:18,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:18,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610984616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:18,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:18,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:18,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248577752] [2021-12-06 18:20:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:18,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:18,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:18,858 INFO L87 Difference]: Start difference. First operand 525 states and 876 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:18,898 INFO L93 Difference]: Finished difference Result 1032 states and 1731 transitions. [2021-12-06 18:20:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-12-06 18:20:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:18,902 INFO L225 Difference]: With dead ends: 1032 [2021-12-06 18:20:18,902 INFO L226 Difference]: Without dead ends: 525 [2021-12-06 18:20:18,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:18,905 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 17 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:18,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2552 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-06 18:20:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-12-06 18:20:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 414 states have (on average 1.6956521739130435) internal successors, (702), 433 states have internal predecessors, (702), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-06 18:20:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 875 transitions. [2021-12-06 18:20:18,924 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 875 transitions. Word has length 105 [2021-12-06 18:20:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:18,924 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 875 transitions. [2021-12-06 18:20:18,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 875 transitions. [2021-12-06 18:20:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 18:20:18,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:18,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:18,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:20:19,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:20:19,127 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1210846416, now seen corresponding path program 1 times [2021-12-06 18:20:19,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:19,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143862387] [2021-12-06 18:20:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:19,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:20:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:20:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:20:19,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:19,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143862387] [2021-12-06 18:20:19,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143862387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:19,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119230248] [2021-12-06 18:20:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:19,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:19,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:19,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:20:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:19,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:20:19,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:19,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:19,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119230248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:19,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:19,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-06 18:20:19,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752713835] [2021-12-06 18:20:19,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:19,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:19,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:20:19,795 INFO L87 Difference]: Start difference. First operand 525 states and 875 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:19,861 INFO L93 Difference]: Finished difference Result 1051 states and 1761 transitions. [2021-12-06 18:20:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:20:19,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-12-06 18:20:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:19,865 INFO L225 Difference]: With dead ends: 1051 [2021-12-06 18:20:19,865 INFO L226 Difference]: Without dead ends: 548 [2021-12-06 18:20:19,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:20:19,868 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 148 mSDsluCounter, 4162 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5016 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:19,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5016 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-06 18:20:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 544. [2021-12-06 18:20:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 430 states have (on average 1.6930232558139535) internal successors, (728), 451 states have internal predecessors, (728), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-12-06 18:20:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 906 transitions. [2021-12-06 18:20:19,886 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 906 transitions. Word has length 106 [2021-12-06 18:20:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:19,886 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 906 transitions. [2021-12-06 18:20:19,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 906 transitions. [2021-12-06 18:20:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 18:20:19,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:19,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:19,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:20:20,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:20,089 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:20,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1596213199, now seen corresponding path program 1 times [2021-12-06 18:20:20,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:20,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264892557] [2021-12-06 18:20:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:20,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:20:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:20:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:20:20,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264892557] [2021-12-06 18:20:20,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264892557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844384794] [2021-12-06 18:20:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:20,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:20,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:20,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:20,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:20:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:20,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:20,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844384794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:20,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:20,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:20,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899857859] [2021-12-06 18:20:20,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:20,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:20,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:20,618 INFO L87 Difference]: Start difference. First operand 544 states and 906 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:20,686 INFO L93 Difference]: Finished difference Result 1092 states and 1835 transitions. [2021-12-06 18:20:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-12-06 18:20:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:20,690 INFO L225 Difference]: With dead ends: 1092 [2021-12-06 18:20:20,690 INFO L226 Difference]: Without dead ends: 544 [2021-12-06 18:20:20,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:20,693 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 135 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:20,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2369 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-06 18:20:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-12-06 18:20:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 430 states have (on average 1.6813953488372093) internal successors, (723), 451 states have internal predecessors, (723), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-12-06 18:20:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 901 transitions. [2021-12-06 18:20:20,711 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 901 transitions. Word has length 106 [2021-12-06 18:20:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:20,711 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 901 transitions. [2021-12-06 18:20:20,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 901 transitions. [2021-12-06 18:20:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 18:20:20,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:20,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:20,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:20:20,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:20,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1554473517, now seen corresponding path program 1 times [2021-12-06 18:20:20,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:20,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029651515] [2021-12-06 18:20:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:20,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 18:20:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:20:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:20:21,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029651515] [2021-12-06 18:20:21,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029651515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644668414] [2021-12-06 18:20:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:21,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:21,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:21,184 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:21,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:20:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:21,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:21,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644668414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:21,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:21,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:21,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278777267] [2021-12-06 18:20:21,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:21,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:21,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:21,475 INFO L87 Difference]: Start difference. First operand 544 states and 901 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:21,546 INFO L93 Difference]: Finished difference Result 1092 states and 1825 transitions. [2021-12-06 18:20:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:21,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2021-12-06 18:20:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:21,550 INFO L225 Difference]: With dead ends: 1092 [2021-12-06 18:20:21,550 INFO L226 Difference]: Without dead ends: 544 [2021-12-06 18:20:21,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:21,553 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 129 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:21,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2369 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-06 18:20:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-12-06 18:20:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 430 states have (on average 1.669767441860465) internal successors, (718), 451 states have internal predecessors, (718), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-12-06 18:20:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 896 transitions. [2021-12-06 18:20:21,573 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 896 transitions. Word has length 108 [2021-12-06 18:20:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:21,573 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 896 transitions. [2021-12-06 18:20:21,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 896 transitions. [2021-12-06 18:20:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 18:20:21,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:21,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:21,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:20:21,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:21,777 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash -747741871, now seen corresponding path program 1 times [2021-12-06 18:20:21,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:21,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518500077] [2021-12-06 18:20:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:21,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:20:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:21,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:20:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:20:22,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:22,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518500077] [2021-12-06 18:20:22,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518500077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:22,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042575097] [2021-12-06 18:20:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:22,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:22,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:22,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:22,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:20:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:22,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:22,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:22,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042575097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:22,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:22,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:22,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954029510] [2021-12-06 18:20:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:22,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:22,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:22,303 INFO L87 Difference]: Start difference. First operand 544 states and 896 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:22,399 INFO L93 Difference]: Finished difference Result 1128 states and 1873 transitions. [2021-12-06 18:20:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:22,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2021-12-06 18:20:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:22,402 INFO L225 Difference]: With dead ends: 1128 [2021-12-06 18:20:22,403 INFO L226 Difference]: Without dead ends: 610 [2021-12-06 18:20:22,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:22,405 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 179 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:22,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2379 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:20:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-06 18:20:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 595. [2021-12-06 18:20:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 480 states have (on average 1.6729166666666666) internal successors, (803), 501 states have internal predecessors, (803), 90 states have call successors, (90), 23 states have call predecessors, (90), 24 states have return successors, (87), 83 states have call predecessors, (87), 85 states have call successors, (87) [2021-12-06 18:20:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 980 transitions. [2021-12-06 18:20:22,432 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 980 transitions. Word has length 110 [2021-12-06 18:20:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:22,432 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 980 transitions. [2021-12-06 18:20:22,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 980 transitions. [2021-12-06 18:20:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:20:22,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:22,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:22,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:20:22,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:22,637 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1074440038, now seen corresponding path program 1 times [2021-12-06 18:20:22,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:22,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388313000] [2021-12-06 18:20:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:22,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:20:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:20:22,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:22,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388313000] [2021-12-06 18:20:22,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388313000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:22,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313552445] [2021-12-06 18:20:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:22,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:22,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:22,912 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:22,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:20:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:20:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:23,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:23,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313552445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:23,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-12-06 18:20:23,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626691587] [2021-12-06 18:20:23,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:23,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:20:23,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:20:23,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:23,199 INFO L87 Difference]: Start difference. First operand 595 states and 980 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:23,303 INFO L93 Difference]: Finished difference Result 1120 states and 1853 transitions. [2021-12-06 18:20:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:20:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-06 18:20:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:23,307 INFO L225 Difference]: With dead ends: 1120 [2021-12-06 18:20:23,307 INFO L226 Difference]: Without dead ends: 617 [2021-12-06 18:20:23,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:20:23,310 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 177 mSDsluCounter, 4902 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5736 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:23,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5736 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:20:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-06 18:20:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 595. [2021-12-06 18:20:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 480 states have (on average 1.6729166666666666) internal successors, (803), 501 states have internal predecessors, (803), 90 states have call successors, (90), 23 states have call predecessors, (90), 24 states have return successors, (87), 83 states have call predecessors, (87), 85 states have call successors, (87) [2021-12-06 18:20:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 980 transitions. [2021-12-06 18:20:23,327 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 980 transitions. Word has length 111 [2021-12-06 18:20:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:23,328 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 980 transitions. [2021-12-06 18:20:23,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 980 transitions. [2021-12-06 18:20:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:20:23,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:23,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:23,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:20:23,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:20:23,531 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 264952581, now seen corresponding path program 1 times [2021-12-06 18:20:23,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:23,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616953671] [2021-12-06 18:20:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:23,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:20:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:23,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:23,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616953671] [2021-12-06 18:20:23,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616953671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:23,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025704805] [2021-12-06 18:20:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:23,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:23,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:23,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:20:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:20:23,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:20:24,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:24,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025704805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:24,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:24,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-06 18:20:24,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234152239] [2021-12-06 18:20:24,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:24,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:24,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:24,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:20:24,062 INFO L87 Difference]: Start difference. First operand 595 states and 980 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:24,122 INFO L93 Difference]: Finished difference Result 1055 states and 1750 transitions. [2021-12-06 18:20:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:20:24,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-06 18:20:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:24,126 INFO L225 Difference]: With dead ends: 1055 [2021-12-06 18:20:24,126 INFO L226 Difference]: Without dead ends: 619 [2021-12-06 18:20:24,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:24,128 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 134 mSDsluCounter, 4129 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 4975 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:24,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 4975 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-12-06 18:20:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 614. [2021-12-06 18:20:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6713709677419355) internal successors, (829), 519 states have internal predecessors, (829), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-06 18:20:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1010 transitions. [2021-12-06 18:20:24,153 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1010 transitions. Word has length 111 [2021-12-06 18:20:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:24,153 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1010 transitions. [2021-12-06 18:20:24,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1010 transitions. [2021-12-06 18:20:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 18:20:24,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:24,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:24,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:20:24,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:20:24,358 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1444130015, now seen corresponding path program 1 times [2021-12-06 18:20:24,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:24,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305075000] [2021-12-06 18:20:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:24,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:20:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:20:24,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305075000] [2021-12-06 18:20:24,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305075000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343547735] [2021-12-06 18:20:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:24,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:24,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:24,627 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:24,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:20:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:24,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:20:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:20:24,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:24,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343547735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:24,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:24,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-06 18:20:24,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333354108] [2021-12-06 18:20:24,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:24,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:24,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:20:24,933 INFO L87 Difference]: Start difference. First operand 614 states and 1010 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:24,982 INFO L93 Difference]: Finished difference Result 1085 states and 1801 transitions. [2021-12-06 18:20:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:20:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-06 18:20:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:24,986 INFO L225 Difference]: With dead ends: 1085 [2021-12-06 18:20:24,986 INFO L226 Difference]: Without dead ends: 649 [2021-12-06 18:20:24,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:20:24,988 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 143 mSDsluCounter, 4119 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 4965 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:24,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 4965 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-06 18:20:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 614. [2021-12-06 18:20:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6713709677419355) internal successors, (829), 519 states have internal predecessors, (829), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-06 18:20:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1010 transitions. [2021-12-06 18:20:25,009 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1010 transitions. Word has length 112 [2021-12-06 18:20:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:25,009 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1010 transitions. [2021-12-06 18:20:25,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1010 transitions. [2021-12-06 18:20:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 18:20:25,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:25,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:25,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:20:25,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:20:25,215 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1512634017, now seen corresponding path program 1 times [2021-12-06 18:20:25,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:25,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849764454] [2021-12-06 18:20:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:25,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:20:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:20:25,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849764454] [2021-12-06 18:20:25,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849764454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793202604] [2021-12-06 18:20:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:25,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:25,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:25,430 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:25,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:20:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:20:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:20:25,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:25,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793202604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:25,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:25,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-06 18:20:25,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281453863] [2021-12-06 18:20:25,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:25,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:20:25,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:20:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:25,692 INFO L87 Difference]: Start difference. First operand 614 states and 1010 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:25,777 INFO L93 Difference]: Finished difference Result 1070 states and 1775 transitions. [2021-12-06 18:20:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:20:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-06 18:20:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:25,780 INFO L225 Difference]: With dead ends: 1070 [2021-12-06 18:20:25,781 INFO L226 Difference]: Without dead ends: 634 [2021-12-06 18:20:25,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:25,782 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 177 mSDsluCounter, 4908 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5744 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:25,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5744 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-06 18:20:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 614. [2021-12-06 18:20:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6713709677419355) internal successors, (829), 519 states have internal predecessors, (829), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-06 18:20:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1010 transitions. [2021-12-06 18:20:25,797 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1010 transitions. Word has length 112 [2021-12-06 18:20:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:25,798 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1010 transitions. [2021-12-06 18:20:25,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1010 transitions. [2021-12-06 18:20:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 18:20:25,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:25,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:25,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 18:20:26,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 18:20:26,001 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1594958174, now seen corresponding path program 1 times [2021-12-06 18:20:26,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:26,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38499580] [2021-12-06 18:20:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:26,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:20:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 18:20:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:20:26,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:26,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38499580] [2021-12-06 18:20:26,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38499580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:26,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371153265] [2021-12-06 18:20:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:26,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:26,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:26,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:26,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:20:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:26,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:20:26,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:26,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371153265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:26,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:26,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-06 18:20:26,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714804757] [2021-12-06 18:20:26,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:26,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:26,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:26,478 INFO L87 Difference]: Start difference. First operand 614 states and 1010 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:26,506 INFO L93 Difference]: Finished difference Result 1122 states and 1860 transitions. [2021-12-06 18:20:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-12-06 18:20:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:26,509 INFO L225 Difference]: With dead ends: 1122 [2021-12-06 18:20:26,510 INFO L226 Difference]: Without dead ends: 614 [2021-12-06 18:20:26,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:26,512 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 23 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:26,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2521 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-06 18:20:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-12-06 18:20:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6633064516129032) internal successors, (825), 519 states have internal predecessors, (825), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-06 18:20:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1006 transitions. [2021-12-06 18:20:26,526 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1006 transitions. Word has length 112 [2021-12-06 18:20:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:26,526 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1006 transitions. [2021-12-06 18:20:26,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1006 transitions. [2021-12-06 18:20:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 18:20:26,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:26,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:26,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:20:26,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:26,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1896184669, now seen corresponding path program 1 times [2021-12-06 18:20:26,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:26,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108216533] [2021-12-06 18:20:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:26,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:20:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:20:26,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108216533] [2021-12-06 18:20:26,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108216533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237642469] [2021-12-06 18:20:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:26,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:26,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:26,951 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:26,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:20:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:20:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:20:27,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:27,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237642469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:27,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:27,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-06 18:20:27,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625850188] [2021-12-06 18:20:27,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:27,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:20:27,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:20:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:20:27,210 INFO L87 Difference]: Start difference. First operand 614 states and 1006 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:27,290 INFO L93 Difference]: Finished difference Result 1070 states and 1772 transitions. [2021-12-06 18:20:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:20:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2021-12-06 18:20:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:27,293 INFO L225 Difference]: With dead ends: 1070 [2021-12-06 18:20:27,293 INFO L226 Difference]: Without dead ends: 634 [2021-12-06 18:20:27,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:20:27,296 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 185 mSDsluCounter, 4870 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 5700 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:27,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 5700 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-06 18:20:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 614. [2021-12-06 18:20:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6633064516129032) internal successors, (825), 519 states have internal predecessors, (825), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-06 18:20:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1006 transitions. [2021-12-06 18:20:27,315 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1006 transitions. Word has length 113 [2021-12-06 18:20:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:27,316 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1006 transitions. [2021-12-06 18:20:27,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1006 transitions. [2021-12-06 18:20:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 18:20:27,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:27,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:27,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:20:27,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:20:27,519 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash -632622236, now seen corresponding path program 1 times [2021-12-06 18:20:27,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:27,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193608123] [2021-12-06 18:20:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:27,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:20:27,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193608123] [2021-12-06 18:20:27,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193608123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431102424] [2021-12-06 18:20:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:27,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:27,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:27,763 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:27,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:20:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:20:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:20:28,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:28,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431102424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:28,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:28,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-06 18:20:28,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923667089] [2021-12-06 18:20:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:28,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:28,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:28,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:28,024 INFO L87 Difference]: Start difference. First operand 614 states and 1006 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:28,055 INFO L93 Difference]: Finished difference Result 1178 states and 1942 transitions. [2021-12-06 18:20:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-06 18:20:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:28,058 INFO L225 Difference]: With dead ends: 1178 [2021-12-06 18:20:28,058 INFO L226 Difference]: Without dead ends: 650 [2021-12-06 18:20:28,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:20:28,061 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 38 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:28,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2497 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-12-06 18:20:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 638. [2021-12-06 18:20:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 520 states have (on average 1.6403846153846153) internal successors, (853), 543 states have internal predecessors, (853), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-06 18:20:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1034 transitions. [2021-12-06 18:20:28,076 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1034 transitions. Word has length 114 [2021-12-06 18:20:28,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:28,076 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1034 transitions. [2021-12-06 18:20:28,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1034 transitions. [2021-12-06 18:20:28,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 18:20:28,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:28,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:28,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:20:28,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:20:28,279 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -729426023, now seen corresponding path program 1 times [2021-12-06 18:20:28,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:28,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023666935] [2021-12-06 18:20:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:28,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:28,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023666935] [2021-12-06 18:20:28,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023666935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298176444] [2021-12-06 18:20:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:28,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:28,492 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:28,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:20:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:20:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:20:28,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:28,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298176444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:28,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:28,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:28,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609069198] [2021-12-06 18:20:28,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:28,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:28,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:28,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:28,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:28,755 INFO L87 Difference]: Start difference. First operand 638 states and 1034 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:28,864 INFO L93 Difference]: Finished difference Result 1188 states and 1971 transitions. [2021-12-06 18:20:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-06 18:20:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:28,870 INFO L225 Difference]: With dead ends: 1188 [2021-12-06 18:20:28,870 INFO L226 Difference]: Without dead ends: 757 [2021-12-06 18:20:28,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:28,874 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 215 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2674 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:28,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2674 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:20:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-12-06 18:20:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 640. [2021-12-06 18:20:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 522 states have (on average 1.6379310344827587) internal successors, (855), 545 states have internal predecessors, (855), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-06 18:20:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1036 transitions. [2021-12-06 18:20:28,898 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1036 transitions. Word has length 114 [2021-12-06 18:20:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:28,898 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1036 transitions. [2021-12-06 18:20:28,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1036 transitions. [2021-12-06 18:20:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 18:20:28,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:28,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:28,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:20:29,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:20:29,101 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 339157456, now seen corresponding path program 1 times [2021-12-06 18:20:29,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:29,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246545087] [2021-12-06 18:20:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:29,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:29,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:29,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246545087] [2021-12-06 18:20:29,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246545087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:29,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481371278] [2021-12-06 18:20:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:29,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:29,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:29,329 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:29,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:20:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:20:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:20:29,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:29,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481371278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:29,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:29,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-12-06 18:20:29,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322814887] [2021-12-06 18:20:29,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:29,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:20:29,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:20:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:20:29,649 INFO L87 Difference]: Start difference. First operand 640 states and 1036 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:20:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:31,641 INFO L93 Difference]: Finished difference Result 1892 states and 3174 transitions. [2021-12-06 18:20:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:20:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 117 [2021-12-06 18:20:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:31,649 INFO L225 Difference]: With dead ends: 1892 [2021-12-06 18:20:31,649 INFO L226 Difference]: Without dead ends: 1459 [2021-12-06 18:20:31,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:20:31,652 INFO L933 BasicCegarLoop]: 1639 mSDtfsCounter, 3103 mSDsluCounter, 3386 mSDsCounter, 0 mSdLazyCounter, 4875 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3220 SdHoareTripleChecker+Valid, 5025 SdHoareTripleChecker+Invalid, 5732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 4875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:31,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3220 Valid, 5025 Invalid, 5732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 4875 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 18:20:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-12-06 18:20:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1294. [2021-12-06 18:20:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1024 states have (on average 1.63671875) internal successors, (1676), 1071 states have internal predecessors, (1676), 214 states have call successors, (214), 42 states have call predecessors, (214), 55 states have return successors, (247), 211 states have call predecessors, (247), 209 states have call successors, (247) [2021-12-06 18:20:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2137 transitions. [2021-12-06 18:20:31,690 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2137 transitions. Word has length 117 [2021-12-06 18:20:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:31,691 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2137 transitions. [2021-12-06 18:20:31,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-06 18:20:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2137 transitions. [2021-12-06 18:20:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:20:31,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:31,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:31,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 18:20:31,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:31,895 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1318929787, now seen corresponding path program 1 times [2021-12-06 18:20:31,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:31,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868598755] [2021-12-06 18:20:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:31,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:20:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:20:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:32,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:32,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868598755] [2021-12-06 18:20:32,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868598755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:32,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128947671] [2021-12-06 18:20:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:32,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:32,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:32,103 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:32,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:20:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:20:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:20:32,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:32,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128947671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:32,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:32,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-06 18:20:32,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088831716] [2021-12-06 18:20:32,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:32,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:20:32,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:32,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:20:32,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:32,362 INFO L87 Difference]: Start difference. First operand 1294 states and 2137 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:32,593 INFO L93 Difference]: Finished difference Result 3197 states and 5413 transitions. [2021-12-06 18:20:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:20:32,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 118 [2021-12-06 18:20:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:32,606 INFO L225 Difference]: With dead ends: 3197 [2021-12-06 18:20:32,606 INFO L226 Difference]: Without dead ends: 2222 [2021-12-06 18:20:32,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:20:32,611 INFO L933 BasicCegarLoop]: 1309 mSDtfsCounter, 699 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 4592 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:32,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 4592 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:20:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-12-06 18:20:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2203. [2021-12-06 18:20:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 1715 states have (on average 1.643731778425656) internal successors, (2819), 1796 states have internal predecessors, (2819), 393 states have call successors, (393), 76 states have call predecessors, (393), 94 states have return successors, (464), 392 states have call predecessors, (464), 388 states have call successors, (464) [2021-12-06 18:20:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3676 transitions. [2021-12-06 18:20:32,674 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3676 transitions. Word has length 118 [2021-12-06 18:20:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:32,674 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 3676 transitions. [2021-12-06 18:20:32,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3676 transitions. [2021-12-06 18:20:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:20:32,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:32,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:32,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 18:20:32,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:32,880 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash -777924206, now seen corresponding path program 1 times [2021-12-06 18:20:32,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:32,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339443922] [2021-12-06 18:20:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:32,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:20:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:20:33,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:33,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339443922] [2021-12-06 18:20:33,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339443922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:33,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726589571] [2021-12-06 18:20:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:33,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:33,104 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:33,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:20:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:20:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:20:33,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:33,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726589571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:33,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:33,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-12-06 18:20:33,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692100124] [2021-12-06 18:20:33,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:33,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:33,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:33,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:20:33,343 INFO L87 Difference]: Start difference. First operand 2203 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:33,403 INFO L93 Difference]: Finished difference Result 4262 states and 7149 transitions. [2021-12-06 18:20:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-12-06 18:20:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:33,415 INFO L225 Difference]: With dead ends: 4262 [2021-12-06 18:20:33,416 INFO L226 Difference]: Without dead ends: 2257 [2021-12-06 18:20:33,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:33,424 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 39 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:33,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2494 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-06 18:20:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2224. [2021-12-06 18:20:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1735 states have (on average 1.6432276657060518) internal successors, (2851), 1817 states have internal predecessors, (2851), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-06 18:20:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3709 transitions. [2021-12-06 18:20:33,488 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3709 transitions. Word has length 120 [2021-12-06 18:20:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:33,489 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3709 transitions. [2021-12-06 18:20:33,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 18:20:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3709 transitions. [2021-12-06 18:20:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 18:20:33,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:33,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:33,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 18:20:33,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:33,695 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash -791330583, now seen corresponding path program 1 times [2021-12-06 18:20:33,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:33,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835346141] [2021-12-06 18:20:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:33,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:20:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:20:33,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:33,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835346141] [2021-12-06 18:20:33,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835346141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708162388] [2021-12-06 18:20:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:33,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:33,953 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:33,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:20:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:20:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:20:34,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:34,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708162388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:34,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:34,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-12-06 18:20:34,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140312980] [2021-12-06 18:20:34,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:34,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:20:34,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:20:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:20:34,252 INFO L87 Difference]: Start difference. First operand 2224 states and 3709 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:34,366 INFO L93 Difference]: Finished difference Result 4192 states and 7029 transitions. [2021-12-06 18:20:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:20:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2021-12-06 18:20:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:34,379 INFO L225 Difference]: With dead ends: 4192 [2021-12-06 18:20:34,379 INFO L226 Difference]: Without dead ends: 2297 [2021-12-06 18:20:34,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:20:34,388 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 175 mSDsluCounter, 4880 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5710 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:34,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 5710 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-12-06 18:20:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2224. [2021-12-06 18:20:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1735 states have (on average 1.6426512968299711) internal successors, (2850), 1817 states have internal predecessors, (2850), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-06 18:20:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3708 transitions. [2021-12-06 18:20:34,499 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3708 transitions. Word has length 121 [2021-12-06 18:20:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:34,499 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3708 transitions. [2021-12-06 18:20:34,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 18:20:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3708 transitions. [2021-12-06 18:20:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 18:20:34,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:34,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:34,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 18:20:34,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:34,709 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1370093547, now seen corresponding path program 1 times [2021-12-06 18:20:34,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:34,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386779071] [2021-12-06 18:20:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:34,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:20:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:20:34,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386779071] [2021-12-06 18:20:34,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386779071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:34,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934335024] [2021-12-06 18:20:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:34,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:34,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:34,972 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:34,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:20:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:20:35,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:20:35,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:35,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934335024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:35,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:35,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2021-12-06 18:20:35,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537995291] [2021-12-06 18:20:35,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:35,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:20:35,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:20:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:35,249 INFO L87 Difference]: Start difference. First operand 2224 states and 3708 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 18:20:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:35,508 INFO L93 Difference]: Finished difference Result 2437 states and 4062 transitions. [2021-12-06 18:20:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:35,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 121 [2021-12-06 18:20:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:35,523 INFO L225 Difference]: With dead ends: 2437 [2021-12-06 18:20:35,523 INFO L226 Difference]: Without dead ends: 2420 [2021-12-06 18:20:35,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:35,524 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 838 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:35,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 2196 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:20:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-12-06 18:20:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2242. [2021-12-06 18:20:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1753 states have (on average 1.6360524814603536) internal successors, (2868), 1835 states have internal predecessors, (2868), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-06 18:20:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3726 transitions. [2021-12-06 18:20:35,599 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3726 transitions. Word has length 121 [2021-12-06 18:20:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:35,599 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3726 transitions. [2021-12-06 18:20:35,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 18:20:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3726 transitions. [2021-12-06 18:20:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 18:20:35,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:35,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:35,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 18:20:35,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:35,810 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash -798145562, now seen corresponding path program 1 times [2021-12-06 18:20:35,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:35,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787473074] [2021-12-06 18:20:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:35,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:20:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:20:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:20:36,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787473074] [2021-12-06 18:20:36,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787473074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:36,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474162373] [2021-12-06 18:20:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:36,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:36,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:36,069 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:36,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:20:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:20:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:20:36,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:36,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474162373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:36,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:36,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-06 18:20:36,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414707627] [2021-12-06 18:20:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:36,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:20:36,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:20:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:36,332 INFO L87 Difference]: Start difference. First operand 2242 states and 3726 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-06 18:20:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:36,378 INFO L93 Difference]: Finished difference Result 2271 states and 3764 transitions. [2021-12-06 18:20:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:20:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 127 [2021-12-06 18:20:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:36,393 INFO L225 Difference]: With dead ends: 2271 [2021-12-06 18:20:36,394 INFO L226 Difference]: Without dead ends: 2254 [2021-12-06 18:20:36,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:20:36,396 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 37 mSDsluCounter, 2517 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3372 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:36,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3372 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:36,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-12-06 18:20:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2242. [2021-12-06 18:20:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1753 states have (on average 1.6326297775242442) internal successors, (2862), 1835 states have internal predecessors, (2862), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-06 18:20:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3720 transitions. [2021-12-06 18:20:36,459 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3720 transitions. Word has length 127 [2021-12-06 18:20:36,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:36,460 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3720 transitions. [2021-12-06 18:20:36,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-06 18:20:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3720 transitions. [2021-12-06 18:20:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 18:20:36,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:36,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:36,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:20:36,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:36,668 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1519715146, now seen corresponding path program 1 times [2021-12-06 18:20:36,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:36,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246680691] [2021-12-06 18:20:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:36,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:20:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:20:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:20:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:36,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:36,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246680691] [2021-12-06 18:20:36,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246680691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:36,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011759982] [2021-12-06 18:20:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:36,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:36,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:36,897 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:36,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:20:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1846 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:20:37,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:20:37,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:37,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011759982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:37,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:37,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 12 [2021-12-06 18:20:37,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147588586] [2021-12-06 18:20:37,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:37,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:37,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:20:37,167 INFO L87 Difference]: Start difference. First operand 2242 states and 3720 transitions. Second operand has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 18:20:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:37,247 INFO L93 Difference]: Finished difference Result 4342 states and 7231 transitions. [2021-12-06 18:20:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:20:37,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 138 [2021-12-06 18:20:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:37,260 INFO L225 Difference]: With dead ends: 4342 [2021-12-06 18:20:37,260 INFO L226 Difference]: Without dead ends: 2325 [2021-12-06 18:20:37,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:37,269 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 167 mSDsluCounter, 4076 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:37,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 4916 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-12-06 18:20:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2242. [2021-12-06 18:20:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1753 states have (on average 1.6326297775242442) internal successors, (2862), 1835 states have internal predecessors, (2862), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-06 18:20:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3720 transitions. [2021-12-06 18:20:37,324 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3720 transitions. Word has length 138 [2021-12-06 18:20:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:37,324 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3720 transitions. [2021-12-06 18:20:37,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 18:20:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3720 transitions. [2021-12-06 18:20:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 18:20:37,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:37,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:37,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 18:20:37,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:20:37,532 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1823731078, now seen corresponding path program 1 times [2021-12-06 18:20:37,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016074267] [2021-12-06 18:20:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:37,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:20:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:20:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:20:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:20:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:20:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:20:37,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016074267] [2021-12-06 18:20:37,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016074267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978683110] [2021-12-06 18:20:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:37,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:37,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:37,771 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:37,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 18:20:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:20:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 18:20:38,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:38,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978683110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:38,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:38,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-06 18:20:38,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773459698] [2021-12-06 18:20:38,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:38,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:38,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:38,080 INFO L87 Difference]: Start difference. First operand 2242 states and 3720 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:38,142 INFO L93 Difference]: Finished difference Result 4346 states and 7242 transitions. [2021-12-06 18:20:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 138 [2021-12-06 18:20:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:38,151 INFO L225 Difference]: With dead ends: 4346 [2021-12-06 18:20:38,151 INFO L226 Difference]: Without dead ends: 2072 [2021-12-06 18:20:38,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:20:38,158 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 11 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:38,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2520 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-06 18:20:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-06 18:20:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.6376720901126407) internal successors, (2617), 1674 states have internal predecessors, (2617), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-06 18:20:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3456 transitions. [2021-12-06 18:20:38,222 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3456 transitions. Word has length 138 [2021-12-06 18:20:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3456 transitions. [2021-12-06 18:20:38,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3456 transitions. [2021-12-06 18:20:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 18:20:38,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:38,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:38,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 18:20:38,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:20:38,429 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 641853903, now seen corresponding path program 1 times [2021-12-06 18:20:38,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:38,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606733019] [2021-12-06 18:20:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:38,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:20:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:20:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:20:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:20:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:38,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606733019] [2021-12-06 18:20:38,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606733019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656765826] [2021-12-06 18:20:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:38,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:38,658 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:38,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 18:20:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:20:38,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:38,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656765826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:38,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:38,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:38,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986142963] [2021-12-06 18:20:38,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:38,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:38,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:38,918 INFO L87 Difference]: Start difference. First operand 2072 states and 3456 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:39,000 INFO L93 Difference]: Finished difference Result 4113 states and 6877 transitions. [2021-12-06 18:20:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 139 [2021-12-06 18:20:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:39,024 INFO L225 Difference]: With dead ends: 4113 [2021-12-06 18:20:39,024 INFO L226 Difference]: Without dead ends: 2072 [2021-12-06 18:20:39,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:39,029 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 177 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:39,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2353 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-06 18:20:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-06 18:20:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.637046307884856) internal successors, (2616), 1674 states have internal predecessors, (2616), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-06 18:20:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3455 transitions. [2021-12-06 18:20:39,095 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3455 transitions. Word has length 139 [2021-12-06 18:20:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:39,095 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3455 transitions. [2021-12-06 18:20:39,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3455 transitions. [2021-12-06 18:20:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 18:20:39,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:39,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:39,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 18:20:39,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:20:39,304 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1043081883, now seen corresponding path program 1 times [2021-12-06 18:20:39,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:39,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321851225] [2021-12-06 18:20:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:39,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:20:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:20:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:20:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:20:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:39,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321851225] [2021-12-06 18:20:39,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321851225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113450667] [2021-12-06 18:20:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:39,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:39,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:39,558 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:39,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 18:20:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:20:39,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113450667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:39,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:39,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 18:20:39,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684288210] [2021-12-06 18:20:39,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:39,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:39,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:39,831 INFO L87 Difference]: Start difference. First operand 2072 states and 3455 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:39,922 INFO L93 Difference]: Finished difference Result 4113 states and 6876 transitions. [2021-12-06 18:20:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2021-12-06 18:20:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:39,930 INFO L225 Difference]: With dead ends: 4113 [2021-12-06 18:20:39,930 INFO L226 Difference]: Without dead ends: 2072 [2021-12-06 18:20:39,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:39,934 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 176 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:39,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2353 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-06 18:20:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-06 18:20:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.6364205256570714) internal successors, (2615), 1674 states have internal predecessors, (2615), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-06 18:20:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3454 transitions. [2021-12-06 18:20:39,983 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3454 transitions. Word has length 140 [2021-12-06 18:20:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:39,983 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3454 transitions. [2021-12-06 18:20:39,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3454 transitions. [2021-12-06 18:20:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 18:20:39,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:39,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:40,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 18:20:40,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 18:20:40,188 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash -874555626, now seen corresponding path program 1 times [2021-12-06 18:20:40,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:40,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620585972] [2021-12-06 18:20:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:40,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:20:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:20:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:20:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:40,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620585972] [2021-12-06 18:20:40,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620585972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785437642] [2021-12-06 18:20:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:40,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:40,402 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:40,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 18:20:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:40,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:20:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:20:40,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:40,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785437642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:40,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:40,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-06 18:20:40,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984474378] [2021-12-06 18:20:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:40,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:40,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:40,665 INFO L87 Difference]: Start difference. First operand 2072 states and 3454 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:40,762 INFO L93 Difference]: Finished difference Result 4113 states and 6881 transitions. [2021-12-06 18:20:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:40,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 141 [2021-12-06 18:20:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:40,769 INFO L225 Difference]: With dead ends: 4113 [2021-12-06 18:20:40,769 INFO L226 Difference]: Without dead ends: 2072 [2021-12-06 18:20:40,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:20:40,773 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 166 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:40,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 2353 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-06 18:20:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-06 18:20:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.6326658322903629) internal successors, (2609), 1674 states have internal predecessors, (2609), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-06 18:20:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3448 transitions. [2021-12-06 18:20:40,822 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3448 transitions. Word has length 141 [2021-12-06 18:20:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:40,822 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3448 transitions. [2021-12-06 18:20:40,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3448 transitions. [2021-12-06 18:20:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 18:20:40,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:40,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:40,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 18:20:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:20:41,027 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash 772807316, now seen corresponding path program 1 times [2021-12-06 18:20:41,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:41,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363688107] [2021-12-06 18:20:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:41,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:20:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:20:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:20:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:41,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363688107] [2021-12-06 18:20:41,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363688107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:41,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:41,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 18:20:41,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642328013] [2021-12-06 18:20:41,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:41,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:20:41,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:20:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:20:41,300 INFO L87 Difference]: Start difference. First operand 2072 states and 3448 transitions. Second operand has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 18:20:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:46,614 INFO L93 Difference]: Finished difference Result 5417 states and 9446 transitions. [2021-12-06 18:20:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:20:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2021-12-06 18:20:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:46,629 INFO L225 Difference]: With dead ends: 5417 [2021-12-06 18:20:46,629 INFO L226 Difference]: Without dead ends: 3391 [2021-12-06 18:20:46,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:20:46,636 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 1907 mSDsluCounter, 4482 mSDsCounter, 0 mSdLazyCounter, 6939 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 5390 SdHoareTripleChecker+Invalid, 7529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 6939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:46,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1977 Valid, 5390 Invalid, 7529 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [590 Valid, 6939 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-06 18:20:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2021-12-06 18:20:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 2152. [2021-12-06 18:20:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1662 states have (on average 1.6263537906137184) internal successors, (2703), 1738 states have internal predecessors, (2703), 398 states have call successors, (398), 73 states have call predecessors, (398), 91 states have return successors, (478), 400 states have call predecessors, (478), 393 states have call successors, (478) [2021-12-06 18:20:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3579 transitions. [2021-12-06 18:20:46,865 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3579 transitions. Word has length 141 [2021-12-06 18:20:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:46,866 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3579 transitions. [2021-12-06 18:20:46,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-06 18:20:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3579 transitions. [2021-12-06 18:20:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 18:20:46,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:46,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:46,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 18:20:46,870 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1425603474, now seen corresponding path program 1 times [2021-12-06 18:20:46,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:46,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527387434] [2021-12-06 18:20:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:46,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:20:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:20:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:20:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:20:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:20:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:20:47,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:47,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527387434] [2021-12-06 18:20:47,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527387434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:47,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:47,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:47,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848283422] [2021-12-06 18:20:47,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:47,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:47,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:47,090 INFO L87 Difference]: Start difference. First operand 2152 states and 3579 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:50,318 INFO L93 Difference]: Finished difference Result 3624 states and 6111 transitions. [2021-12-06 18:20:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:20:50,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 145 [2021-12-06 18:20:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:50,324 INFO L225 Difference]: With dead ends: 3624 [2021-12-06 18:20:50,324 INFO L226 Difference]: Without dead ends: 1486 [2021-12-06 18:20:50,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:50,329 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 1711 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:50,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 2177 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 18:20:50,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-12-06 18:20:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 991. [2021-12-06 18:20:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 785 states have (on average 1.6191082802547772) internal successors, (1271), 818 states have internal predecessors, (1271), 163 states have call successors, (163), 40 states have call predecessors, (163), 42 states have return successors, (175), 157 states have call predecessors, (175), 158 states have call successors, (175) [2021-12-06 18:20:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1609 transitions. [2021-12-06 18:20:50,453 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1609 transitions. Word has length 145 [2021-12-06 18:20:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:50,453 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1609 transitions. [2021-12-06 18:20:50,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1609 transitions. [2021-12-06 18:20:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:50,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:50,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:50,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 18:20:50,456 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:50,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1986822718, now seen corresponding path program 1 times [2021-12-06 18:20:50,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:50,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656986451] [2021-12-06 18:20:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:50,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:20:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:20:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:20:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:20:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:20:50,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:50,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656986451] [2021-12-06 18:20:50,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656986451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:50,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017900212] [2021-12-06 18:20:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:50,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:50,754 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:50,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 18:20:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:20:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:20:51,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:51,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017900212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:51,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:51,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-12-06 18:20:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687893952] [2021-12-06 18:20:51,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:20:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:20:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:51,027 INFO L87 Difference]: Start difference. First operand 991 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:51,226 INFO L93 Difference]: Finished difference Result 2607 states and 4327 transitions. [2021-12-06 18:20:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:20:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 146 [2021-12-06 18:20:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:51,233 INFO L225 Difference]: With dead ends: 2607 [2021-12-06 18:20:51,233 INFO L226 Difference]: Without dead ends: 1733 [2021-12-06 18:20:51,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:51,235 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 760 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:51,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1626 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:20:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2021-12-06 18:20:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1718. [2021-12-06 18:20:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1345 states have (on average 1.620817843866171) internal successors, (2180), 1403 states have internal predecessors, (2180), 298 states have call successors, (298), 72 states have call predecessors, (298), 74 states have return successors, (331), 291 states have call predecessors, (331), 293 states have call successors, (331) [2021-12-06 18:20:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2809 transitions. [2021-12-06 18:20:51,385 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2809 transitions. Word has length 146 [2021-12-06 18:20:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:51,386 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 2809 transitions. [2021-12-06 18:20:51,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 18:20:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2809 transitions. [2021-12-06 18:20:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 18:20:51,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:51,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:51,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 18:20:51,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 18:20:51,588 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2123355544, now seen corresponding path program 1 times [2021-12-06 18:20:51,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:51,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848878716] [2021-12-06 18:20:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:51,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:20:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:20:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 18:20:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:20:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:20:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:20:51,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:51,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848878716] [2021-12-06 18:20:51,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848878716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:51,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123502821] [2021-12-06 18:20:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:51,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:51,847 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:51,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 18:20:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:20:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:20:52,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:52,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123502821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:52,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:52,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2021-12-06 18:20:52,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320078675] [2021-12-06 18:20:52,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:52,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:20:52,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:52,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:20:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:52,152 INFO L87 Difference]: Start difference. First operand 1718 states and 2809 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 18:20:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:52,514 INFO L93 Difference]: Finished difference Result 4779 states and 7951 transitions. [2021-12-06 18:20:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:20:52,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2021-12-06 18:20:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:52,526 INFO L225 Difference]: With dead ends: 4779 [2021-12-06 18:20:52,526 INFO L226 Difference]: Without dead ends: 3191 [2021-12-06 18:20:52,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:52,531 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 821 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:52,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1472 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:20:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2021-12-06 18:20:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3173. [2021-12-06 18:20:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 2466 states have (on average 1.6346309813463098) internal successors, (4031), 2578 states have internal predecessors, (4031), 568 states have call successors, (568), 136 states have call predecessors, (568), 138 states have return successors, (656), 556 states have call predecessors, (656), 563 states have call successors, (656) [2021-12-06 18:20:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 5255 transitions. [2021-12-06 18:20:52,811 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 5255 transitions. Word has length 151 [2021-12-06 18:20:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:52,812 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 5255 transitions. [2021-12-06 18:20:52,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 18:20:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 5255 transitions. [2021-12-06 18:20:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 18:20:52,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:52,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:52,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 18:20:53,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:53,014 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1499051412, now seen corresponding path program 1 times [2021-12-06 18:20:53,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146280135] [2021-12-06 18:20:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:53,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:20:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:20:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:20:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:20:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:20:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:20:53,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146280135] [2021-12-06 18:20:53,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146280135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815255257] [2021-12-06 18:20:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:53,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:53,325 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:53,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:20:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:20:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:20:53,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:53,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815255257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:53,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:53,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2021-12-06 18:20:53,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738595180] [2021-12-06 18:20:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:53,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:20:53,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:20:53,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:53,642 INFO L87 Difference]: Start difference. First operand 3173 states and 5255 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 18:20:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:53,975 INFO L93 Difference]: Finished difference Result 5703 states and 9535 transitions. [2021-12-06 18:20:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:20:53,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-12-06 18:20:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:53,987 INFO L225 Difference]: With dead ends: 5703 [2021-12-06 18:20:53,987 INFO L226 Difference]: Without dead ends: 3173 [2021-12-06 18:20:53,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:20:53,994 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 329 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:53,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 2317 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2021-12-06 18:20:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 3173. [2021-12-06 18:20:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 2466 states have (on average 1.6277372262773722) internal successors, (4014), 2578 states have internal predecessors, (4014), 568 states have call successors, (568), 136 states have call predecessors, (568), 138 states have return successors, (656), 556 states have call predecessors, (656), 563 states have call successors, (656) [2021-12-06 18:20:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 5238 transitions. [2021-12-06 18:20:54,314 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 5238 transitions. Word has length 154 [2021-12-06 18:20:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:54,314 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 5238 transitions. [2021-12-06 18:20:54,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 18:20:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 5238 transitions. [2021-12-06 18:20:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 18:20:54,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:54,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:54,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 18:20:54,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:54,517 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:54,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1899588620, now seen corresponding path program 1 times [2021-12-06 18:20:54,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:54,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720727012] [2021-12-06 18:20:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:54,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:20:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:20:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:20:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:20:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:20:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:20:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:20:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:20:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:20:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:20:54,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:54,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720727012] [2021-12-06 18:20:54,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720727012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:54,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:54,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:20:54,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229269312] [2021-12-06 18:20:54,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:54,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:20:54,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:54,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:20:54,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:54,796 INFO L87 Difference]: Start difference. First operand 3173 states and 5238 transitions. Second operand has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:21:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:03,034 INFO L93 Difference]: Finished difference Result 8597 states and 15370 transitions. [2021-12-06 18:21:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 18:21:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-12-06 18:21:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:03,059 INFO L225 Difference]: With dead ends: 8597 [2021-12-06 18:21:03,059 INFO L226 Difference]: Without dead ends: 6200 [2021-12-06 18:21:03,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:21:03,067 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 4175 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 6483 mSolverCounterSat, 1541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 4337 SdHoareTripleChecker+Invalid, 8024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1541 IncrementalHoareTripleChecker+Valid, 6483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:03,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 4337 Invalid, 8024 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1541 Valid, 6483 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-06 18:21:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2021-12-06 18:21:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 4280. [2021-12-06 18:21:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 3324 states have (on average 1.6161251504211793) internal successors, (5372), 3481 states have internal predecessors, (5372), 747 states have call successors, (747), 181 states have call predecessors, (747), 208 states have return successors, (951), 737 states have call predecessors, (951), 742 states have call successors, (951) [2021-12-06 18:21:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 7070 transitions. [2021-12-06 18:21:03,530 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 7070 transitions. Word has length 156 [2021-12-06 18:21:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:03,530 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 7070 transitions. [2021-12-06 18:21:03,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:21:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 7070 transitions. [2021-12-06 18:21:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 18:21:03,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:03,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:03,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 18:21:03,533 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash -609607598, now seen corresponding path program 1 times [2021-12-06 18:21:03,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:03,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967253449] [2021-12-06 18:21:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:03,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:21:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:21:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:21:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:21:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 18:21:03,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967253449] [2021-12-06 18:21:03,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967253449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:03,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197916571] [2021-12-06 18:21:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:03,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:03,814 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:03,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 18:21:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:04,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:21:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:21:04,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:21:04,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197916571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:04,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:21:04,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-06 18:21:04,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373590170] [2021-12-06 18:21:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:04,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:21:04,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:21:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:21:04,128 INFO L87 Difference]: Start difference. First operand 4280 states and 7070 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:21:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:04,625 INFO L93 Difference]: Finished difference Result 8492 states and 14266 transitions. [2021-12-06 18:21:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:21:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 158 [2021-12-06 18:21:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:04,641 INFO L225 Difference]: With dead ends: 8492 [2021-12-06 18:21:04,642 INFO L226 Difference]: Without dead ends: 4330 [2021-12-06 18:21:04,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:21:04,652 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 22 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:04,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2353 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:21:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2021-12-06 18:21:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 4330. [2021-12-06 18:21:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 3364 states have (on average 1.6055291319857312) internal successors, (5401), 3526 states have internal predecessors, (5401), 747 states have call successors, (747), 186 states have call predecessors, (747), 218 states have return successors, (961), 737 states have call predecessors, (961), 742 states have call successors, (961) [2021-12-06 18:21:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 7109 transitions. [2021-12-06 18:21:05,090 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 7109 transitions. Word has length 158 [2021-12-06 18:21:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:05,090 INFO L470 AbstractCegarLoop]: Abstraction has 4330 states and 7109 transitions. [2021-12-06 18:21:05,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:21:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 7109 transitions. [2021-12-06 18:21:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 18:21:05,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:05,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:05,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-06 18:21:05,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 18:21:05,293 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:05,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1909879435, now seen corresponding path program 1 times [2021-12-06 18:21:05,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:05,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311736937] [2021-12-06 18:21:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:05,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:21:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:21:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 18:21:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:21:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:21:05,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:05,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311736937] [2021-12-06 18:21:05,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311736937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:05,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:21:05,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:21:05,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591936786] [2021-12-06 18:21:05,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:05,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:21:05,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:21:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:21:05,555 INFO L87 Difference]: Start difference. First operand 4330 states and 7109 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:21:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:13,632 INFO L93 Difference]: Finished difference Result 9867 states and 17012 transitions. [2021-12-06 18:21:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:21:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 159 [2021-12-06 18:21:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:13,655 INFO L225 Difference]: With dead ends: 9867 [2021-12-06 18:21:13,655 INFO L226 Difference]: Without dead ends: 6317 [2021-12-06 18:21:13,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:21:13,665 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 3395 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 5755 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 6928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 5755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:13,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3453 Valid, 3346 Invalid, 6928 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1173 Valid, 5755 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-06 18:21:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-12-06 18:21:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 4691. [2021-12-06 18:21:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3657 states have (on average 1.5849056603773586) internal successors, (5796), 3818 states have internal predecessors, (5796), 786 states have call successors, (786), 219 states have call predecessors, (786), 247 states have return successors, (1019), 773 states have call predecessors, (1019), 781 states have call successors, (1019) [2021-12-06 18:21:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7601 transitions. [2021-12-06 18:21:14,261 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7601 transitions. Word has length 159 [2021-12-06 18:21:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:14,261 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 7601 transitions. [2021-12-06 18:21:14,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:21:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7601 transitions. [2021-12-06 18:21:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 18:21:14,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:14,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:14,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 18:21:14,264 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1919597385, now seen corresponding path program 1 times [2021-12-06 18:21:14,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501982230] [2021-12-06 18:21:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:14,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:21:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:21:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:21:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:21:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:21:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:21:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 18:21:14,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:14,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501982230] [2021-12-06 18:21:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501982230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:14,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:21:14,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 18:21:14,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867206763] [2021-12-06 18:21:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:14,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:21:14,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:21:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:21:14,572 INFO L87 Difference]: Start difference. First operand 4691 states and 7601 transitions. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 18:21:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:21,231 INFO L93 Difference]: Finished difference Result 11867 states and 20394 transitions. [2021-12-06 18:21:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:21:21,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 3 states have call successors, (17) Word has length 166 [2021-12-06 18:21:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:21,261 INFO L225 Difference]: With dead ends: 11867 [2021-12-06 18:21:21,261 INFO L226 Difference]: Without dead ends: 7304 [2021-12-06 18:21:21,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:21:21,273 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 3156 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 6077 mSolverCounterSat, 1489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3156 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 7566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1489 IncrementalHoareTripleChecker+Valid, 6077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:21,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3156 Valid, 3210 Invalid, 7566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1489 Valid, 6077 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 18:21:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2021-12-06 18:21:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 4721. [2021-12-06 18:21:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 3677 states have (on average 1.5722056023932554) internal successors, (5781), 3843 states have internal predecessors, (5781), 786 states have call successors, (786), 219 states have call predecessors, (786), 257 states have return successors, (1079), 778 states have call predecessors, (1079), 781 states have call successors, (1079) [2021-12-06 18:21:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 7646 transitions. [2021-12-06 18:21:21,906 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 7646 transitions. Word has length 166 [2021-12-06 18:21:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:21,906 INFO L470 AbstractCegarLoop]: Abstraction has 4721 states and 7646 transitions. [2021-12-06 18:21:21,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 18:21:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 7646 transitions. [2021-12-06 18:21:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 18:21:21,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:21,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:21,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 18:21:21,909 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash -520714892, now seen corresponding path program 1 times [2021-12-06 18:21:21,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:21,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316568024] [2021-12-06 18:21:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:21,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:21:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:21:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:21:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:21:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 18:21:22,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:22,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316568024] [2021-12-06 18:21:22,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316568024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:22,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:21:22,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:21:22,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193168136] [2021-12-06 18:21:22,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:22,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:21:22,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:22,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:21:22,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:21:22,193 INFO L87 Difference]: Start difference. First operand 4721 states and 7646 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 5 states have internal predecessors, (113), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-06 18:21:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:32,294 INFO L93 Difference]: Finished difference Result 20189 states and 35855 transitions. [2021-12-06 18:21:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:21:32,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 5 states have internal predecessors, (113), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 165 [2021-12-06 18:21:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:32,367 INFO L225 Difference]: With dead ends: 20189 [2021-12-06 18:21:32,367 INFO L226 Difference]: Without dead ends: 15610 [2021-12-06 18:21:32,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:21:32,386 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 5216 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 4315 mSolverCounterSat, 1998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5275 SdHoareTripleChecker+Valid, 2752 SdHoareTripleChecker+Invalid, 6313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1998 IncrementalHoareTripleChecker+Valid, 4315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:32,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5275 Valid, 2752 Invalid, 6313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1998 Valid, 4315 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-12-06 18:21:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15610 states. [2021-12-06 18:21:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15610 to 10867. [2021-12-06 18:21:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10867 states, 8312 states have (on average 1.5641241578440808) internal successors, (13001), 8732 states have internal predecessors, (13001), 1971 states have call successors, (1971), 460 states have call predecessors, (1971), 583 states have return successors, (2876), 1964 states have call predecessors, (2876), 1966 states have call successors, (2876) [2021-12-06 18:21:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10867 states to 10867 states and 17848 transitions. [2021-12-06 18:21:33,941 INFO L78 Accepts]: Start accepts. Automaton has 10867 states and 17848 transitions. Word has length 165 [2021-12-06 18:21:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:33,941 INFO L470 AbstractCegarLoop]: Abstraction has 10867 states and 17848 transitions. [2021-12-06 18:21:33,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 5 states have internal predecessors, (113), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-06 18:21:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10867 states and 17848 transitions. [2021-12-06 18:21:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 18:21:33,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:33,947 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:33,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 18:21:33,947 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash 122539648, now seen corresponding path program 1 times [2021-12-06 18:21:33,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:33,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341378746] [2021-12-06 18:21:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:33,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:21:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:21:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:21:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:21:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:21:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 18:21:34,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:34,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341378746] [2021-12-06 18:21:34,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341378746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:34,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:21:34,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:21:34,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035308770] [2021-12-06 18:21:34,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:34,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:21:34,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:34,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:21:34,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:21:34,289 INFO L87 Difference]: Start difference. First operand 10867 states and 17848 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 5 states have internal predecessors, (115), 5 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-06 18:21:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:43,878 INFO L93 Difference]: Finished difference Result 40835 states and 73481 transitions. [2021-12-06 18:21:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:21:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 5 states have internal predecessors, (115), 5 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 173 [2021-12-06 18:21:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:44,023 INFO L225 Difference]: With dead ends: 40835 [2021-12-06 18:21:44,023 INFO L226 Difference]: Without dead ends: 30090 [2021-12-06 18:21:44,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:21:44,066 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 5326 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 1854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5367 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1854 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:44,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5367 Valid, 1607 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1854 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-06 18:21:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30090 states. [2021-12-06 18:21:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30090 to 22178. [2021-12-06 18:21:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22178 states, 16979 states have (on average 1.5525060368690735) internal successors, (26360), 17864 states have internal predecessors, (26360), 3977 states have call successors, (3977), 916 states have call predecessors, (3977), 1221 states have return successors, (6413), 3977 states have call predecessors, (6413), 3972 states have call successors, (6413) [2021-12-06 18:21:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22178 states to 22178 states and 36750 transitions. [2021-12-06 18:21:47,218 INFO L78 Accepts]: Start accepts. Automaton has 22178 states and 36750 transitions. Word has length 173 [2021-12-06 18:21:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:47,218 INFO L470 AbstractCegarLoop]: Abstraction has 22178 states and 36750 transitions. [2021-12-06 18:21:47,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 5 states have internal predecessors, (115), 5 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-06 18:21:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22178 states and 36750 transitions. [2021-12-06 18:21:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-06 18:21:47,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:47,225 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:47,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 18:21:47,225 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1838923505, now seen corresponding path program 1 times [2021-12-06 18:21:47,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844961376] [2021-12-06 18:21:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:47,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:21:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:21:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:21:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:21:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:21:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:21:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:21:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:21:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 18:21:47,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844961376] [2021-12-06 18:21:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844961376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848226769] [2021-12-06 18:21:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:47,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:47,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:47,455 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:47,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 18:21:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1968 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:21:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:21:47,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:21:47,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848226769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:47,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:21:47,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-06 18:21:47,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542314219] [2021-12-06 18:21:47,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:47,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:21:47,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:21:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:21:47,833 INFO L87 Difference]: Start difference. First operand 22178 states and 36750 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 18:21:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:49,488 INFO L93 Difference]: Finished difference Result 32781 states and 54132 transitions. [2021-12-06 18:21:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:21:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 179 [2021-12-06 18:21:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:49,523 INFO L225 Difference]: With dead ends: 32781 [2021-12-06 18:21:49,524 INFO L226 Difference]: Without dead ends: 10722 [2021-12-06 18:21:49,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:21:49,565 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 81 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:49,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 2369 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:21:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10722 states. [2021-12-06 18:21:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10722 to 10692. [2021-12-06 18:21:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 8195 states have (on average 1.5580231848688224) internal successors, (12768), 8614 states have internal predecessors, (12768), 1913 states have call successors, (1913), 460 states have call predecessors, (1913), 583 states have return successors, (2819), 1907 states have call predecessors, (2819), 1909 states have call successors, (2819) [2021-12-06 18:21:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 17500 transitions. [2021-12-06 18:21:50,952 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 17500 transitions. Word has length 179 [2021-12-06 18:21:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:50,952 INFO L470 AbstractCegarLoop]: Abstraction has 10692 states and 17500 transitions. [2021-12-06 18:21:50,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 18:21:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 17500 transitions. [2021-12-06 18:21:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 18:21:50,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:50,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:50,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 18:21:51,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 18:21:51,156 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1180532636, now seen corresponding path program 1 times [2021-12-06 18:21:51,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:51,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530651908] [2021-12-06 18:21:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:51,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:21:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:21:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:21:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:21:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:21:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:21:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:21:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 18:21:51,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:51,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530651908] [2021-12-06 18:21:51,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530651908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:51,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880836592] [2021-12-06 18:21:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:51,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:51,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:51,441 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:51,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 18:21:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:51,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:21:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 18:21:51,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:21:51,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880836592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:51,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:21:51,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2021-12-06 18:21:51,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222906269] [2021-12-06 18:21:51,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:51,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:21:51,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:21:51,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:21:51,778 INFO L87 Difference]: Start difference. First operand 10692 states and 17500 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-06 18:21:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:53,186 INFO L93 Difference]: Finished difference Result 11070 states and 18106 transitions. [2021-12-06 18:21:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:21:53,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 176 [2021-12-06 18:21:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:53,221 INFO L225 Difference]: With dead ends: 11070 [2021-12-06 18:21:53,221 INFO L226 Difference]: Without dead ends: 11056 [2021-12-06 18:21:53,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:21:53,226 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 66 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 3347 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:53,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 3347 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:21:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11056 states. [2021-12-06 18:21:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11056 to 10722. [2021-12-06 18:21:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10722 states, 8225 states have (on average 1.5547720364741642) internal successors, (12788), 8644 states have internal predecessors, (12788), 1913 states have call successors, (1913), 460 states have call predecessors, (1913), 583 states have return successors, (2819), 1907 states have call predecessors, (2819), 1909 states have call successors, (2819) [2021-12-06 18:21:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10722 states to 10722 states and 17520 transitions. [2021-12-06 18:21:54,618 INFO L78 Accepts]: Start accepts. Automaton has 10722 states and 17520 transitions. Word has length 176 [2021-12-06 18:21:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:54,619 INFO L470 AbstractCegarLoop]: Abstraction has 10722 states and 17520 transitions. [2021-12-06 18:21:54,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-06 18:21:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 10722 states and 17520 transitions. [2021-12-06 18:21:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 18:21:54,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:54,623 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:54,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 18:21:54,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:54,824 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2055720194, now seen corresponding path program 1 times [2021-12-06 18:21:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:54,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920852870] [2021-12-06 18:21:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:54,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:21:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:21:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:21:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:21:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:21:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:21:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:21:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:21:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:21:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:21:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:21:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:21:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:21:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 18:21:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-06 18:21:55,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:55,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920852870] [2021-12-06 18:21:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920852870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:55,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427064432] [2021-12-06 18:21:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:55,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:55,127 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:55,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 18:21:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:55,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:21:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:21:55,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:21:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 18:21:56,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427064432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:21:56,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:21:56,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 24 [2021-12-06 18:21:56,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899173488] [2021-12-06 18:21:56,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:21:56,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:21:56,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:21:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:21:56,048 INFO L87 Difference]: Start difference. First operand 10722 states and 17520 transitions. Second operand has 24 states, 23 states have (on average 12.782608695652174) internal successors, (294), 18 states have internal predecessors, (294), 9 states have call successors, (56), 8 states have call predecessors, (56), 13 states have return successors, (54), 12 states have call predecessors, (54), 9 states have call successors, (54) [2021-12-06 18:22:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:22:16,363 INFO L93 Difference]: Finished difference Result 47358 states and 87050 transitions. [2021-12-06 18:22:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:22:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 12.782608695652174) internal successors, (294), 18 states have internal predecessors, (294), 9 states have call successors, (56), 8 states have call predecessors, (56), 13 states have return successors, (54), 12 states have call predecessors, (54), 9 states have call successors, (54) Word has length 204 [2021-12-06 18:22:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:22:16,560 INFO L225 Difference]: With dead ends: 47358 [2021-12-06 18:22:16,560 INFO L226 Difference]: Without dead ends: 36775 [2021-12-06 18:22:16,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 464 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=850, Invalid=4120, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:22:16,682 INFO L933 BasicCegarLoop]: 1789 mSDtfsCounter, 10454 mSDsluCounter, 8818 mSDsCounter, 0 mSdLazyCounter, 20456 mSolverCounterSat, 4624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10463 SdHoareTripleChecker+Valid, 10607 SdHoareTripleChecker+Invalid, 25080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4624 IncrementalHoareTripleChecker+Valid, 20456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:22:16,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10463 Valid, 10607 Invalid, 25080 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4624 Valid, 20456 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2021-12-06 18:22:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36775 states. [2021-12-06 18:22:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36775 to 24737. [2021-12-06 18:22:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24737 states, 18529 states have (on average 1.5371579685897783) internal successors, (28482), 19547 states have internal predecessors, (28482), 4899 states have call successors, (4899), 973 states have call predecessors, (4899), 1308 states have return successors, (7388), 4946 states have call predecessors, (7388), 4895 states have call successors, (7388) [2021-12-06 18:22:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24737 states to 24737 states and 40769 transitions. [2021-12-06 18:22:20,687 INFO L78 Accepts]: Start accepts. Automaton has 24737 states and 40769 transitions. Word has length 204 [2021-12-06 18:22:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:22:20,687 INFO L470 AbstractCegarLoop]: Abstraction has 24737 states and 40769 transitions. [2021-12-06 18:22:20,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 12.782608695652174) internal successors, (294), 18 states have internal predecessors, (294), 9 states have call successors, (56), 8 states have call predecessors, (56), 13 states have return successors, (54), 12 states have call predecessors, (54), 9 states have call successors, (54) [2021-12-06 18:22:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 24737 states and 40769 transitions. [2021-12-06 18:22:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 18:22:20,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:22:20,699 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:22:20,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 18:22:20,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 18:22:20,899 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:22:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:22:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1055026865, now seen corresponding path program 1 times [2021-12-06 18:22:20,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:22:20,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926407676] [2021-12-06 18:22:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:22:20,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:22:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:22:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:20,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:20,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:22:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 18:22:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:22:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:22:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:22:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:22:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:22:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:22:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:22:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:22:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:22:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:22:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:22:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:22:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:22:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:22:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-06 18:22:21,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:22:21,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926407676] [2021-12-06 18:22:21,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926407676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:22:21,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809539554] [2021-12-06 18:22:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:22:21,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:22:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:22:21,148 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:22:21,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 18:22:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 2044 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:22:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:22:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 18:22:21,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:22:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 18:22:21,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809539554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:22:21,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:22:21,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2021-12-06 18:22:21,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856319371] [2021-12-06 18:22:21,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:22:21,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:22:21,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:22:21,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:22:21,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:22:21,917 INFO L87 Difference]: Start difference. First operand 24737 states and 40769 transitions. Second operand has 22 states, 21 states have (on average 12.904761904761905) internal successors, (271), 16 states have internal predecessors, (271), 8 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (52), 10 states have call predecessors, (52), 8 states have call successors, (52) [2021-12-06 18:22:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:22:45,656 INFO L93 Difference]: Finished difference Result 83629 states and 151572 transitions. [2021-12-06 18:22:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:22:45,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 12.904761904761905) internal successors, (271), 16 states have internal predecessors, (271), 8 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (52), 10 states have call predecessors, (52), 8 states have call successors, (52) Word has length 210 [2021-12-06 18:22:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:22:46,039 INFO L225 Difference]: With dead ends: 83629 [2021-12-06 18:22:46,039 INFO L226 Difference]: Without dead ends: 72268 [2021-12-06 18:22:46,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 467 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=490, Invalid=2372, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:22:46,112 INFO L933 BasicCegarLoop]: 1717 mSDtfsCounter, 4774 mSDsluCounter, 9782 mSDsCounter, 0 mSdLazyCounter, 17459 mSolverCounterSat, 1931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4788 SdHoareTripleChecker+Valid, 11499 SdHoareTripleChecker+Invalid, 19390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1931 IncrementalHoareTripleChecker+Valid, 17459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:22:46,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4788 Valid, 11499 Invalid, 19390 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1931 Valid, 17459 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-12-06 18:22:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72268 states. [2021-12-06 18:22:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72268 to 56884. [2021-12-06 18:22:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56884 states, 41415 states have (on average 1.5353132922854038) internal successors, (63585), 43951 states have internal predecessors, (63585), 12648 states have call successors, (12648), 1931 states have call predecessors, (12648), 2820 states have return successors, (19308), 12881 states have call predecessors, (19308), 12644 states have call successors, (19308) [2021-12-06 18:22:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56884 states to 56884 states and 95541 transitions. [2021-12-06 18:22:56,358 INFO L78 Accepts]: Start accepts. Automaton has 56884 states and 95541 transitions. Word has length 210 [2021-12-06 18:22:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:22:56,358 INFO L470 AbstractCegarLoop]: Abstraction has 56884 states and 95541 transitions. [2021-12-06 18:22:56,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 12.904761904761905) internal successors, (271), 16 states have internal predecessors, (271), 8 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (52), 10 states have call predecessors, (52), 8 states have call successors, (52) [2021-12-06 18:22:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 56884 states and 95541 transitions. [2021-12-06 18:22:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-06 18:22:56,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:22:56,384 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:22:56,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 18:22:56,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 18:22:56,584 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:22:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:22:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1277380815, now seen corresponding path program 1 times [2021-12-06 18:22:56,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:22:56,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400536706] [2021-12-06 18:22:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:22:56,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:22:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:22:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:22:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:22:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:22:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:22:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:22:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:22:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:22:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:22:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:22:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:22:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:22:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:22:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:22:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:22:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:22:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:22:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:22:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:22:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:22:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:22:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-06 18:22:56,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:22:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400536706] [2021-12-06 18:22:56,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400536706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:22:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920243492] [2021-12-06 18:22:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:22:56,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:22:56,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:22:56,902 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:22:56,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 18:22:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2373 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:22:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:22:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 18:22:57,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:22:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 18:22:57,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920243492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:22:57,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:22:57,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2021-12-06 18:22:57,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536220679] [2021-12-06 18:22:57,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:22:57,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:22:57,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:22:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:22:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:22:57,679 INFO L87 Difference]: Start difference. First operand 56884 states and 95541 transitions. Second operand has 20 states, 20 states have (on average 12.35) internal successors, (247), 17 states have internal predecessors, (247), 13 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (45), 13 states have call predecessors, (45), 12 states have call successors, (45) [2021-12-06 18:23:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:23:57,809 INFO L93 Difference]: Finished difference Result 191815 states and 362713 transitions. [2021-12-06 18:23:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-12-06 18:23:57,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 12.35) internal successors, (247), 17 states have internal predecessors, (247), 13 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (45), 13 states have call predecessors, (45), 12 states have call successors, (45) Word has length 242 [2021-12-06 18:23:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:23:59,006 INFO L225 Difference]: With dead ends: 191815 [2021-12-06 18:23:59,006 INFO L226 Difference]: Without dead ends: 143881 [2021-12-06 18:23:59,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16013 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3720, Invalid=34110, Unknown=0, NotChecked=0, Total=37830 [2021-12-06 18:23:59,387 INFO L933 BasicCegarLoop]: 1883 mSDtfsCounter, 29792 mSDsluCounter, 8555 mSDsCounter, 0 mSdLazyCounter, 24363 mSolverCounterSat, 15445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29855 SdHoareTripleChecker+Valid, 10438 SdHoareTripleChecker+Invalid, 39808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 15445 IncrementalHoareTripleChecker+Valid, 24363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:23:59,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29855 Valid, 10438 Invalid, 39808 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [15445 Valid, 24363 Invalid, 0 Unknown, 0 Unchecked, 21.8s Time] [2021-12-06 18:23:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143881 states. [2021-12-06 18:24:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143881 to 112008. [2021-12-06 18:24:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112008 states, 82949 states have (on average 1.490614715065884) internal successors, (123645), 87101 states have internal predecessors, (123645), 22670 states have call successors, (22670), 4599 states have call predecessors, (22670), 6388 states have return successors, (41246), 22939 states have call predecessors, (41246), 22666 states have call successors, (41246) [2021-12-06 18:24:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112008 states to 112008 states and 187561 transitions. [2021-12-06 18:24:20,884 INFO L78 Accepts]: Start accepts. Automaton has 112008 states and 187561 transitions. Word has length 242 [2021-12-06 18:24:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:20,885 INFO L470 AbstractCegarLoop]: Abstraction has 112008 states and 187561 transitions. [2021-12-06 18:24:20,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.35) internal successors, (247), 17 states have internal predecessors, (247), 13 states have call successors, (52), 10 states have call predecessors, (52), 10 states have return successors, (45), 13 states have call predecessors, (45), 12 states have call successors, (45) [2021-12-06 18:24:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 112008 states and 187561 transitions. [2021-12-06 18:24:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-06 18:24:20,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:20,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:20,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 18:24:21,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:21,123 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1547686347, now seen corresponding path program 1 times [2021-12-06 18:24:21,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:21,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654314664] [2021-12-06 18:24:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:21,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:24:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:24:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:24:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:24:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:24:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:24:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:24:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:24:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:24:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:24:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:24:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:24:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:24:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:24:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:24:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:24:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:24:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:24:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-06 18:24:21,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654314664] [2021-12-06 18:24:21,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654314664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621402348] [2021-12-06 18:24:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:21,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:21,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:21,440 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:21,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 18:24:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 2367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:24:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 18:24:21,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:24:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 18:24:22,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621402348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:24:22,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:24:22,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 21 [2021-12-06 18:24:22,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436808720] [2021-12-06 18:24:22,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:24:22,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:24:22,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:24:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:24:22,198 INFO L87 Difference]: Start difference. First operand 112008 states and 187561 transitions. Second operand has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 18 states have internal predecessors, (258), 14 states have call successors, (50), 10 states have call predecessors, (50), 11 states have return successors, (47), 15 states have call predecessors, (47), 13 states have call successors, (47) [2021-12-06 18:26:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:09,428 INFO L93 Difference]: Finished difference Result 326323 states and 603364 transitions. [2021-12-06 18:26:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-12-06 18:26:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 18 states have internal predecessors, (258), 14 states have call successors, (50), 10 states have call predecessors, (50), 11 states have return successors, (47), 15 states have call predecessors, (47), 13 states have call successors, (47) Word has length 242 [2021-12-06 18:26:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:11,364 INFO L225 Difference]: With dead ends: 326323 [2021-12-06 18:26:11,364 INFO L226 Difference]: Without dead ends: 221807 [2021-12-06 18:26:12,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 610 SyntacticMatches, 2 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25489 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=4889, Invalid=54403, Unknown=0, NotChecked=0, Total=59292 [2021-12-06 18:26:12,165 INFO L933 BasicCegarLoop]: 3549 mSDtfsCounter, 36027 mSDsluCounter, 14912 mSDsCounter, 0 mSdLazyCounter, 45425 mSolverCounterSat, 21119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36027 SdHoareTripleChecker+Valid, 18461 SdHoareTripleChecker+Invalid, 66544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 21119 IncrementalHoareTripleChecker+Valid, 45425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:12,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36027 Valid, 18461 Invalid, 66544 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [21119 Valid, 45425 Invalid, 0 Unknown, 0 Unchecked, 39.9s Time] [2021-12-06 18:26:12,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221807 states. [2021-12-06 18:26:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221807 to 121926. [2021-12-06 18:26:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121926 states, 86373 states have (on average 1.5312424021395574) internal successors, (132258), 93249 states have internal predecessors, (132258), 29825 states have call successors, (29825), 3291 states have call predecessors, (29825), 5727 states have return successors, (57466), 30305 states have call predecessors, (57466), 29821 states have call successors, (57466) [2021-12-06 18:26:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121926 states to 121926 states and 219549 transitions. [2021-12-06 18:26:40,067 INFO L78 Accepts]: Start accepts. Automaton has 121926 states and 219549 transitions. Word has length 242 [2021-12-06 18:26:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:40,067 INFO L470 AbstractCegarLoop]: Abstraction has 121926 states and 219549 transitions. [2021-12-06 18:26:40,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 18 states have internal predecessors, (258), 14 states have call successors, (50), 10 states have call predecessors, (50), 11 states have return successors, (47), 15 states have call predecessors, (47), 13 states have call successors, (47) [2021-12-06 18:26:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 121926 states and 219549 transitions. [2021-12-06 18:26:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-06 18:26:40,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:40,096 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:40,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 18:26:40,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 18:26:40,297 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1407182518, now seen corresponding path program 1 times [2021-12-06 18:26:40,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:40,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928743228] [2021-12-06 18:26:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:40,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:26:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:26:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:26:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:26:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:26:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:26:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:26:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:26:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 18:26:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:26:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 18:26:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:26:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:26:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:26:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:26:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 18:26:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 18:26:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 18:26:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 18:26:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-06 18:26:40,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928743228] [2021-12-06 18:26:40,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928743228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64718803] [2021-12-06 18:26:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:40,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:40,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:40,559 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:40,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 18:26:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:26:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 18:26:40,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:26:40,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64718803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:40,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:26:40,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2021-12-06 18:26:40,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556564377] [2021-12-06 18:26:40,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:40,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:26:40,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:40,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:26:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:26:40,956 INFO L87 Difference]: Start difference. First operand 121926 states and 219549 transitions. Second operand has 8 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-06 18:27:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:05,152 INFO L93 Difference]: Finished difference Result 174528 states and 312010 transitions. [2021-12-06 18:27:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:27:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 229 [2021-12-06 18:27:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:05,910 INFO L225 Difference]: With dead ends: 174528 [2021-12-06 18:27:05,911 INFO L226 Difference]: Without dead ends: 121920 [2021-12-06 18:27:06,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:27:06,103 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 127 mSDsluCounter, 4667 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 5458 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:06,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 5458 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121920 states. [2021-12-06 18:27:30,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121920 to 121920. [2021-12-06 18:27:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121920 states, 86367 states have (on average 1.5312561510762213) internal successors, (132250), 93243 states have internal predecessors, (132250), 29825 states have call successors, (29825), 3291 states have call predecessors, (29825), 5727 states have return successors, (57466), 30305 states have call predecessors, (57466), 29821 states have call successors, (57466) [2021-12-06 18:27:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121920 states to 121920 states and 219541 transitions. [2021-12-06 18:27:31,547 INFO L78 Accepts]: Start accepts. Automaton has 121920 states and 219541 transitions. Word has length 229 [2021-12-06 18:27:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:31,547 INFO L470 AbstractCegarLoop]: Abstraction has 121920 states and 219541 transitions. [2021-12-06 18:27:31,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-06 18:27:31,547 INFO L276 IsEmpty]: Start isEmpty. Operand 121920 states and 219541 transitions. [2021-12-06 18:27:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-06 18:27:31,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:31,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:31,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 18:27:31,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:31,776 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -222010741, now seen corresponding path program 1 times [2021-12-06 18:27:31,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:31,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19835402] [2021-12-06 18:27:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:31,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:27:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:27:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:27:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:27:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:27:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:27:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:27:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:27:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 18:27:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:31,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 18:27:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:27:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:27:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:27:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:27:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:27:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 18:27:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:27:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:27:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:27:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:27:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:27:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:27:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 18:27:32,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:32,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19835402] [2021-12-06 18:27:32,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19835402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:32,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209473583] [2021-12-06 18:27:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:32,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:32,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:32,040 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:32,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 18:27:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:27:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 18:27:32,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:27:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209473583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:32,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:27:32,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-06 18:27:32,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111654601] [2021-12-06 18:27:32,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:32,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:27:32,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:27:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:27:32,430 INFO L87 Difference]: Start difference. First operand 121920 states and 219541 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-06 18:27:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:58,786 INFO L93 Difference]: Finished difference Result 249320 states and 456047 transitions. [2021-12-06 18:27:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:27:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 265 [2021-12-06 18:27:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:59,537 INFO L225 Difference]: With dead ends: 249320 [2021-12-06 18:27:59,537 INFO L226 Difference]: Without dead ends: 127536 [2021-12-06 18:28:00,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:28:00,247 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 213 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:00,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2211 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127536 states. [2021-12-06 18:28:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127536 to 127536. [2021-12-06 18:28:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127536 states, 91839 states have (on average 1.5544812116856672) internal successors, (142762), 98715 states have internal predecessors, (142762), 29825 states have call successors, (29825), 3435 states have call predecessors, (29825), 5871 states have return successors, (57466), 30305 states have call predecessors, (57466), 29821 states have call successors, (57466) [2021-12-06 18:28:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127536 states to 127536 states and 230053 transitions. [2021-12-06 18:28:25,839 INFO L78 Accepts]: Start accepts. Automaton has 127536 states and 230053 transitions. Word has length 265 [2021-12-06 18:28:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:25,840 INFO L470 AbstractCegarLoop]: Abstraction has 127536 states and 230053 transitions. [2021-12-06 18:28:25,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-06 18:28:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 127536 states and 230053 transitions. [2021-12-06 18:28:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 18:28:25,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:25,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:25,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 18:28:26,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 18:28:26,082 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2144777840, now seen corresponding path program 1 times [2021-12-06 18:28:26,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:26,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472618087] [2021-12-06 18:28:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:26,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:28:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:28:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:28:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:28:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:28:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:28:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:28:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:28:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:28:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:28:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:28:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 18:28:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:28:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:28:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:28:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:28:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:28:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:28:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:28:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:28:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:28:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:28:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 18:28:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:28:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 18:28:26,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472618087] [2021-12-06 18:28:26,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472618087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:28:26,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:28:26,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:28:26,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054832542] [2021-12-06 18:28:26,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:28:26,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:28:26,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:28:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:28:26,485 INFO L87 Difference]: Start difference. First operand 127536 states and 230053 transitions. Second operand has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 6 states have internal predecessors, (154), 3 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-06 18:29:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:38,989 INFO L93 Difference]: Finished difference Result 399572 states and 758162 transitions. [2021-12-06 18:29:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:29:38,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 6 states have internal predecessors, (154), 3 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 238 [2021-12-06 18:29:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:41,138 INFO L225 Difference]: With dead ends: 399572 [2021-12-06 18:29:41,138 INFO L226 Difference]: Without dead ends: 271868 [2021-12-06 18:29:42,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:29:42,126 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 2479 mSDsluCounter, 3691 mSDsCounter, 0 mSdLazyCounter, 7483 mSolverCounterSat, 1067 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 5243 SdHoareTripleChecker+Invalid, 8550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1067 IncrementalHoareTripleChecker+Valid, 7483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:42,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2547 Valid, 5243 Invalid, 8550 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1067 Valid, 7483 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-12-06 18:29:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271868 states. [2021-12-06 18:30:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271868 to 224903. [2021-12-06 18:30:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224903 states, 160332 states have (on average 1.5695993313873713) internal successors, (251657), 172901 states have internal predecessors, (251657), 54818 states have call successors, (54818), 5851 states have call predecessors, (54818), 9752 states have return successors, (104418), 55514 states have call predecessors, (104418), 54814 states have call successors, (104418) [2021-12-06 18:30:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224903 states to 224903 states and 410893 transitions. [2021-12-06 18:30:31,698 INFO L78 Accepts]: Start accepts. Automaton has 224903 states and 410893 transitions. Word has length 238 [2021-12-06 18:30:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:31,698 INFO L470 AbstractCegarLoop]: Abstraction has 224903 states and 410893 transitions. [2021-12-06 18:30:31,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 6 states have internal predecessors, (154), 3 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-06 18:30:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 224903 states and 410893 transitions. [2021-12-06 18:30:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-06 18:30:31,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:31,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:31,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-06 18:30:31,734 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1996112481, now seen corresponding path program 1 times [2021-12-06 18:30:31,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:31,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110455038] [2021-12-06 18:30:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:31,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:31,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 18:30:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:31,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:30:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:31,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:30:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:31,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:30:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:31,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:30:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:31,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:30:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:31,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:30:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:30:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:30:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 18:30:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 18:30:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:30:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 18:30:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 18:30:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:30:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:30:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:30:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:30:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:30:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 18:30:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:30:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 18:30:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:30:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:30:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:30:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:30:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 18:30:32,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:32,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110455038] [2021-12-06 18:30:32,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110455038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:32,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907648246] [2021-12-06 18:30:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:32,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:32,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:32,104 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:32,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b4dd97-2e51-4dd3-b3c2-a3a2e608f441/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 18:30:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:30:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 18:30:32,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:30:32,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907648246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:30:32,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:30:32,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-06 18:30:32,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998636490] [2021-12-06 18:30:32,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:30:32,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:30:32,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:30:32,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:30:32,614 INFO L87 Difference]: Start difference. First operand 224903 states and 410893 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26)