./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_stateful-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stateful-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y --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 8ecae2ca1de1e5b446d807037ed0cb2d4fc04c355acb35a6870f18f7e175f10e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:54:29,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:54:29,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:54:29,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:54:29,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:54:29,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:54:29,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:54:29,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:54:29,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:54:29,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:54:29,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:54:29,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:54:29,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:54:29,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:54:29,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:54:29,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:54:29,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:54:29,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:54:29,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:54:29,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:54:29,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:54:29,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:54:29,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:54:29,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:54:29,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:54:29,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:54:29,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:54:29,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:54:29,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:54:29,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:54:29,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:54:29,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:54:29,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:54:29,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:54:29,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:54:29,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:54:29,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:54:29,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:54:29,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:54:29,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:54:29,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:54:29,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:54:29,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:54:29,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:54:29,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:54:29,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:54:29,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:54:29,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:54:29,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:54:29,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:54:29,938 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:54:29,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:54:29,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:54:29,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:54:29,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:54:29,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:54:29,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:54:29,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:54:29,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:54:29,942 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:54:29,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:54:29,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:54:29,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:54:29,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:54:29,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:54:29,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:54:29,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:54:29,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:54:29,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:54:29,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:54:29,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:54:29,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:54:29,944 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:54:29,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:54:29,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:54:29,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:54:29,945 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_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ecae2ca1de1e5b446d807037ed0cb2d4fc04c355acb35a6870f18f7e175f10e [2021-11-13 18:54:30,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:54:30,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:54:30,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:54:30,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:54:30,312 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:54:30,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2021-11-13 18:54:30,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/data/068770b56/0cbff75bf87048ad86cfd10277fcc4c5/FLAGa78dfaab4 [2021-11-13 18:54:31,101 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:54:31,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2021-11-13 18:54:31,132 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/data/068770b56/0cbff75bf87048ad86cfd10277fcc4c5/FLAGa78dfaab4 [2021-11-13 18:54:31,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/data/068770b56/0cbff75bf87048ad86cfd10277fcc4c5 [2021-11-13 18:54:31,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:54:31,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:54:31,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:54:31,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:54:31,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:54:31,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:54:31" (1/1) ... [2021-11-13 18:54:31,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673c901d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:31, skipping insertion in model container [2021-11-13 18:54:31,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:54:31" (1/1) ... [2021-11-13 18:54:31,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:54:31,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:54:31,890 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/sv-benchmarks/c/seq-pthread/cs_stateful-1.i[23400,23413] [2021-11-13 18:54:32,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:54:32,066 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:54:32,121 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/sv-benchmarks/c/seq-pthread/cs_stateful-1.i[23400,23413] [2021-11-13 18:54:32,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:54:32,252 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:54:32,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32 WrapperNode [2021-11-13 18:54:32,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:54:32,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:54:32,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:54:32,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:54:32,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:54:32,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:54:32,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:54:32,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:54:32,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:54:32,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:54:32,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:54:32,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:54:32,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (1/1) ... [2021-11-13 18:54:32,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:54:32,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:32,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:54:32,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:54:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:54:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:54:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:54:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:54:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2021-11-13 18:54:32,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2021-11-13 18:54:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-11-13 18:54:32,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-11-13 18:54:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-11-13 18:54:32,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-11-13 18:54:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:54:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-11-13 18:54:32,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-11-13 18:54:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-13 18:54:32,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-13 18:54:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:54:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:54:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-11-13 18:54:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-11-13 18:54:32,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:54:32,630 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-11-13 18:54:32,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-11-13 18:54:32,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:54:32,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:54:33,300 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L746: SUMMARY for call __CS_cs(); srcloc: null [2021-11-13 18:54:33,301 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-13 18:54:33,301 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-1: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 18:54:33,302 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##31: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 18:54:33,302 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-13 18:54:33,302 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 18:54:33,302 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-11-13 18:54:35,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:54:35,883 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:54:35,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:54:35 BoogieIcfgContainer [2021-11-13 18:54:35,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:54:35,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:54:35,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:54:35,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:54:35,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:54:31" (1/3) ... [2021-11-13 18:54:35,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a35fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:54:35, skipping insertion in model container [2021-11-13 18:54:35,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:54:32" (2/3) ... [2021-11-13 18:54:35,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a35fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:54:35, skipping insertion in model container [2021-11-13 18:54:35,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:54:35" (3/3) ... [2021-11-13 18:54:35,897 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stateful-1.i [2021-11-13 18:54:35,903 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:54:35,904 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:54:35,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:54:35,974 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:54:35,975 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:54:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 121 states have (on average 1.5041322314049588) internal successors, (182), 122 states have internal predecessors, (182), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-13 18:54:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:54:36,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:36,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:36,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1724368089, now seen corresponding path program 1 times [2021-11-13 18:54:36,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:36,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109316963] [2021-11-13 18:54:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:36,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:36,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:36,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109316963] [2021-11-13 18:54:36,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109316963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:36,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:54:36,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:54:36,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650132320] [2021-11-13 18:54:36,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:36,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:54:36,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:54:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:54:36,512 INFO L87 Difference]: Start difference. First operand has 172 states, 121 states have (on average 1.5041322314049588) internal successors, (182), 122 states have internal predecessors, (182), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:36,677 INFO L93 Difference]: Finished difference Result 347 states and 569 transitions. [2021-11-13 18:54:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:54:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-13 18:54:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:36,693 INFO L225 Difference]: With dead ends: 347 [2021-11-13 18:54:36,693 INFO L226 Difference]: Without dead ends: 173 [2021-11-13 18:54:36,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:54:36,705 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 5 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:36,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 492 Invalid, 9 Unknown, 0 Unchecked, 10.48ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 62.10ms Time] [2021-11-13 18:54:36,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-13 18:54:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2021-11-13 18:54:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 119 states have (on average 1.3781512605042017) internal successors, (164), 119 states have internal predecessors, (164), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-13 18:54:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 248 transitions. [2021-11-13 18:54:36,791 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 248 transitions. Word has length 32 [2021-11-13 18:54:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:36,791 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 248 transitions. [2021-11-13 18:54:36,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 248 transitions. [2021-11-13 18:54:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:54:36,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:36,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:36,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:54:36,799 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1488698589, now seen corresponding path program 1 times [2021-11-13 18:54:36,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:36,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147404766] [2021-11-13 18:54:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:36,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:36,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:36,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147404766] [2021-11-13 18:54:36,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147404766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:36,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:54:36,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:54:36,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910112275] [2021-11-13 18:54:36,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:36,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:54:36,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:54:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:54:36,966 INFO L87 Difference]: Start difference. First operand 169 states and 248 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:37,015 INFO L93 Difference]: Finished difference Result 337 states and 496 transitions. [2021-11-13 18:54:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:54:37,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-13 18:54:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:37,020 INFO L225 Difference]: With dead ends: 337 [2021-11-13 18:54:37,020 INFO L226 Difference]: Without dead ends: 171 [2021-11-13 18:54:37,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:54:37,023 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 1 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:37,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 487 Invalid, 6 Unknown, 0 Unchecked, 5.92ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 16.29ms Time] [2021-11-13 18:54:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-13 18:54:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-11-13 18:54:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 120 states have (on average 1.375) internal successors, (165), 120 states have internal predecessors, (165), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-13 18:54:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 249 transitions. [2021-11-13 18:54:37,050 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 249 transitions. Word has length 36 [2021-11-13 18:54:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:37,050 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 249 transitions. [2021-11-13 18:54:37,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 249 transitions. [2021-11-13 18:54:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:54:37,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:37,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:37,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:54:37,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash 967627515, now seen corresponding path program 1 times [2021-11-13 18:54:37,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:37,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162243182] [2021-11-13 18:54:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:37,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:37,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:37,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162243182] [2021-11-13 18:54:37,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162243182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:37,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415522497] [2021-11-13 18:54:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:37,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:37,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:37,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:54:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:54:37,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:37,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:37,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415522497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:37,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:37,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-13 18:54:37,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167279120] [2021-11-13 18:54:37,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:37,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:54:37,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:54:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:54:37,748 INFO L87 Difference]: Start difference. First operand 170 states and 249 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:37,829 INFO L93 Difference]: Finished difference Result 341 states and 501 transitions. [2021-11-13 18:54:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:54:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-13 18:54:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:37,843 INFO L225 Difference]: With dead ends: 341 [2021-11-13 18:54:37,844 INFO L226 Difference]: Without dead ends: 174 [2021-11-13 18:54:37,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:54:37,847 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 3 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:37,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 971 Invalid, 15 Unknown, 0 Unchecked, 7.35ms Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 41.29ms Time] [2021-11-13 18:54:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-13 18:54:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-13 18:54:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 124 states have (on average 1.3629032258064515) internal successors, (169), 124 states have internal predecessors, (169), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-13 18:54:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 253 transitions. [2021-11-13 18:54:37,893 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 253 transitions. Word has length 38 [2021-11-13 18:54:37,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:37,893 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 253 transitions. [2021-11-13 18:54:37,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:37,894 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 253 transitions. [2021-11-13 18:54:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 18:54:37,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:37,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:37,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:38,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-13 18:54:38,119 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash -624054089, now seen corresponding path program 2 times [2021-11-13 18:54:38,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:38,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935507276] [2021-11-13 18:54:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:38,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:54:38,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:38,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935507276] [2021-11-13 18:54:38,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935507276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:38,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268024687] [2021-11-13 18:54:38,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:54:38,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:38,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:38,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:38,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:54:38,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:54:38,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:54:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:54:38,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:54:38,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268024687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:38,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:54:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-13 18:54:38,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187801806] [2021-11-13 18:54:38,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:54:38,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:54:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:54:38,788 INFO L87 Difference]: Start difference. First operand 174 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:38,863 INFO L93 Difference]: Finished difference Result 332 states and 495 transitions. [2021-11-13 18:54:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:54:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-13 18:54:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:38,870 INFO L225 Difference]: With dead ends: 332 [2021-11-13 18:54:38,871 INFO L226 Difference]: Without dead ends: 306 [2021-11-13 18:54:38,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:54:38,875 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 206 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:38,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 934 Invalid, 9 Unknown, 0 Unchecked, 17.00ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 14.72ms Time] [2021-11-13 18:54:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-13 18:54:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2021-11-13 18:54:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 207 states have (on average 1.4106280193236715) internal successors, (292), 207 states have internal predecessors, (292), 83 states have call successors, (83), 14 states have call predecessors, (83), 14 states have return successors, (91), 83 states have call predecessors, (91), 83 states have call successors, (91) [2021-11-13 18:54:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 466 transitions. [2021-11-13 18:54:38,946 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 466 transitions. Word has length 42 [2021-11-13 18:54:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:38,947 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 466 transitions. [2021-11-13 18:54:38,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 466 transitions. [2021-11-13 18:54:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:54:38,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:38,964 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:39,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:39,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:39,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:39,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1759881955, now seen corresponding path program 1 times [2021-11-13 18:54:39,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:39,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735376685] [2021-11-13 18:54:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:39,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:54:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:54:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:54:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:54:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:54:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:54:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:54:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 18:54:39,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:39,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735376685] [2021-11-13 18:54:39,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735376685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:39,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814106812] [2021-11-13 18:54:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:39,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:39,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:39,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:39,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:54:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:54:39,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 18:54:40,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 18:54:40,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814106812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:40,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:40,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 9 [2021-11-13 18:54:40,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522177595] [2021-11-13 18:54:40,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:40,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:54:40,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:54:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:54:40,332 INFO L87 Difference]: Start difference. First operand 305 states and 466 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:54:42,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:44,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:45,978 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:47,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:48,782 INFO L93 Difference]: Finished difference Result 617 states and 950 transitions. [2021-11-13 18:54:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:54:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 100 [2021-11-13 18:54:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:48,787 INFO L225 Difference]: With dead ends: 617 [2021-11-13 18:54:48,787 INFO L226 Difference]: Without dead ends: 325 [2021-11-13 18:54:48,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:54:48,791 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 36 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 51 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8182.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.17ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8361.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:48,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 994 Invalid, 590 Unknown, 0 Unchecked, 12.17ms Time], IncrementalHoareTripleChecker [51 Valid, 536 Invalid, 3 Unknown, 0 Unchecked, 8361.68ms Time] [2021-11-13 18:54:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-13 18:54:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 319. [2021-11-13 18:54:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 219 states have (on average 1.3926940639269407) internal successors, (305), 221 states have internal predecessors, (305), 83 states have call successors, (83), 14 states have call predecessors, (83), 16 states have return successors, (97), 83 states have call predecessors, (97), 83 states have call successors, (97) [2021-11-13 18:54:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 485 transitions. [2021-11-13 18:54:48,851 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 485 transitions. Word has length 100 [2021-11-13 18:54:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:48,853 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 485 transitions. [2021-11-13 18:54:48,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:54:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 485 transitions. [2021-11-13 18:54:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 18:54:48,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:48,858 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 18:54:48,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:49,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:49,079 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:49,080 INFO L85 PathProgramCache]: Analyzing trace with hash -420954683, now seen corresponding path program 2 times [2021-11-13 18:54:49,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:49,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385489683] [2021-11-13 18:54:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:49,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-13 18:54:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:54:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:54:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:54:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:54:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:54:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:54:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 18:54:49,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:49,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385489683] [2021-11-13 18:54:49,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385489683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:49,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:54:49,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:54:49,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538756306] [2021-11-13 18:54:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:49,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:54:49,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:54:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:54:49,517 INFO L87 Difference]: Start difference. First operand 319 states and 485 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:54:51,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:52,919 INFO L93 Difference]: Finished difference Result 662 states and 1021 transitions. [2021-11-13 18:54:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:54:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-11-13 18:54:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:52,930 INFO L225 Difference]: With dead ends: 662 [2021-11-13 18:54:52,930 INFO L226 Difference]: Without dead ends: 636 [2021-11-13 18:54:52,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:54:52,934 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 313 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 167 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2983.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.23ms SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3171.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:52,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 949 Invalid, 825 Unknown, 0 Unchecked, 15.23ms Time], IncrementalHoareTripleChecker [167 Valid, 657 Invalid, 1 Unknown, 0 Unchecked, 3171.58ms Time] [2021-11-13 18:54:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-13 18:54:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 595. [2021-11-13 18:54:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 394 states have (on average 1.4238578680203047) internal successors, (561), 401 states have internal predecessors, (561), 165 states have call successors, (165), 28 states have call predecessors, (165), 35 states have return successors, (209), 165 states have call predecessors, (209), 165 states have call successors, (209) [2021-11-13 18:54:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 935 transitions. [2021-11-13 18:54:53,007 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 935 transitions. Word has length 110 [2021-11-13 18:54:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:53,011 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 935 transitions. [2021-11-13 18:54:53,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:54:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 935 transitions. [2021-11-13 18:54:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 18:54:53,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:53,020 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 18:54:53,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:54:53,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash -593993191, now seen corresponding path program 1 times [2021-11-13 18:54:53,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:53,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021385243] [2021-11-13 18:54:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:53,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-13 18:54:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:54:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:54:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:54:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:54:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:54:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:54:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 18:54:55,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:55,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021385243] [2021-11-13 18:54:55,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021385243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:55,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:54:55,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:54:55,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950031649] [2021-11-13 18:54:55,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:55,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:54:55,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:54:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:54:55,684 INFO L87 Difference]: Start difference. First operand 595 states and 935 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:54:57,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:58,745 INFO L93 Difference]: Finished difference Result 919 states and 1424 transitions. [2021-11-13 18:54:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:54:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-11-13 18:54:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:58,753 INFO L225 Difference]: With dead ends: 919 [2021-11-13 18:54:58,753 INFO L226 Difference]: Without dead ends: 610 [2021-11-13 18:54:58,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:54:58,757 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 54 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2750.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.98ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2884.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:58,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1030 Invalid, 648 Unknown, 0 Unchecked, 10.98ms Time], IncrementalHoareTripleChecker [96 Valid, 551 Invalid, 1 Unknown, 0 Unchecked, 2884.04ms Time] [2021-11-13 18:54:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-13 18:54:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 597. [2021-11-13 18:54:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 396 states have (on average 1.4217171717171717) internal successors, (563), 403 states have internal predecessors, (563), 165 states have call successors, (165), 28 states have call predecessors, (165), 35 states have return successors, (209), 165 states have call predecessors, (209), 165 states have call successors, (209) [2021-11-13 18:54:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 937 transitions. [2021-11-13 18:54:58,823 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 937 transitions. Word has length 110 [2021-11-13 18:54:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:58,823 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 937 transitions. [2021-11-13 18:54:58,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:54:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 937 transitions. [2021-11-13 18:54:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:54:58,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:58,828 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-11-13 18:54:58,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:54:58,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash 368465859, now seen corresponding path program 1 times [2021-11-13 18:54:58,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:58,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853194231] [2021-11-13 18:54:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:58,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:54:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:54:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:54:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:54:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:54:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:54:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:54:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:54:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:54:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-13 18:54:59,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853194231] [2021-11-13 18:54:59,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853194231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279082580] [2021-11-13 18:54:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:59,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:59,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:59,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:54:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:54:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:59,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 18:54:59,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-11-13 18:54:59,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-13 18:54:59,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-13 18:55:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 18:55:00,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:55:00,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279082580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:00,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:55:00,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-13 18:55:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699921366] [2021-11-13 18:55:00,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:55:00,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:55:00,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:55:00,137 INFO L87 Difference]: Start difference. First operand 597 states and 937 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:55:02,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:04,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:05,256 INFO L93 Difference]: Finished difference Result 1237 states and 1936 transitions. [2021-11-13 18:55:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:55:05,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2021-11-13 18:55:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:05,264 INFO L225 Difference]: With dead ends: 1237 [2021-11-13 18:55:05,264 INFO L226 Difference]: Without dead ends: 648 [2021-11-13 18:55:05,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:55:05,269 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 317 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4953.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.26ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5032.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:05,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 1009 Invalid, 211 Unknown, 0 Unchecked, 6.26ms Time], IncrementalHoareTripleChecker [60 Valid, 149 Invalid, 2 Unknown, 0 Unchecked, 5032.29ms Time] [2021-11-13 18:55:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-13 18:55:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 613. [2021-11-13 18:55:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 407 states have (on average 1.4176904176904177) internal successors, (577), 413 states have internal predecessors, (577), 170 states have call successors, (170), 27 states have call predecessors, (170), 35 states have return successors, (210), 172 states have call predecessors, (210), 170 states have call successors, (210) [2021-11-13 18:55:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 957 transitions. [2021-11-13 18:55:05,346 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 957 transitions. Word has length 128 [2021-11-13 18:55:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:05,347 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 957 transitions. [2021-11-13 18:55:05,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:55:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 957 transitions. [2021-11-13 18:55:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:55:05,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:05,352 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-11-13 18:55:05,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:05,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:55:05,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1044737443, now seen corresponding path program 1 times [2021-11-13 18:55:05,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:05,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844543554] [2021-11-13 18:55:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:05,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:55:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:55:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:55:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:55:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:55:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:55:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:55:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:55:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:55:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-13 18:55:08,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:08,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844543554] [2021-11-13 18:55:08,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844543554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:08,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434743387] [2021-11-13 18:55:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:08,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:08,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:08,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:08,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:55:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:55:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 18:55:09,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:55:09,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434743387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:09,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:55:09,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-11-13 18:55:09,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315567178] [2021-11-13 18:55:09,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:09,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:55:09,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:55:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:55:09,626 INFO L87 Difference]: Start difference. First operand 613 states and 957 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:55:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:10,446 INFO L93 Difference]: Finished difference Result 1408 states and 2336 transitions. [2021-11-13 18:55:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:55:10,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2021-11-13 18:55:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:10,465 INFO L225 Difference]: With dead ends: 1408 [2021-11-13 18:55:10,465 INFO L226 Difference]: Without dead ends: 828 [2021-11-13 18:55:10,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:55:10,474 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 437 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 589.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.08ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 721.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:10,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 564 Invalid, 485 Unknown, 0 Unchecked, 8.08ms Time], IncrementalHoareTripleChecker [56 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 721.46ms Time] [2021-11-13 18:55:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-13 18:55:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 788. [2021-11-13 18:55:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 569 states have (on average 1.2987697715289983) internal successors, (739), 475 states have internal predecessors, (739), 170 states have call successors, (170), 27 states have call predecessors, (170), 48 states have return successors, (335), 285 states have call predecessors, (335), 170 states have call successors, (335) [2021-11-13 18:55:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1244 transitions. [2021-11-13 18:55:10,563 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1244 transitions. Word has length 128 [2021-11-13 18:55:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:10,563 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1244 transitions. [2021-11-13 18:55:10,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:55:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1244 transitions. [2021-11-13 18:55:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:55:10,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:10,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:10,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:10,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:10,791 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:10,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1754284257, now seen corresponding path program 1 times [2021-11-13 18:55:10,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:10,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288842229] [2021-11-13 18:55:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:10,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:55:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:55:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:55:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:55:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:55:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:55:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:55:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:55:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:55:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-13 18:55:12,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:12,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288842229] [2021-11-13 18:55:12,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288842229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:12,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996221398] [2021-11-13 18:55:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:12,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:12,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:12,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:12,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:55:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 18:55:13,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:55:13,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:55:14,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996221398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:14,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:14,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 25 [2021-11-13 18:55:14,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477715225] [2021-11-13 18:55:14,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:14,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:55:14,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:55:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:55:14,541 INFO L87 Difference]: Start difference. First operand 788 states and 1244 transitions. Second operand has 25 states, 25 states have (on average 7.0) internal successors, (175), 21 states have internal predecessors, (175), 9 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-11-13 18:55:16,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:24,400 INFO L93 Difference]: Finished difference Result 2206 states and 3414 transitions. [2021-11-13 18:55:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:55:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.0) internal successors, (175), 21 states have internal predecessors, (175), 9 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 128 [2021-11-13 18:55:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:24,418 INFO L225 Difference]: With dead ends: 2206 [2021-11-13 18:55:24,418 INFO L226 Difference]: Without dead ends: 1445 [2021-11-13 18:55:24,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 278 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=608, Invalid=2932, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:55:24,430 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 826 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 663 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7128.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 4940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.71ms SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7965.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:24,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 1632 Invalid, 4940 Unknown, 0 Unchecked, 56.71ms Time], IncrementalHoareTripleChecker [663 Valid, 4276 Invalid, 1 Unknown, 0 Unchecked, 7965.16ms Time] [2021-11-13 18:55:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-11-13 18:55:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1066. [2021-11-13 18:55:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 760 states have (on average 1.2736842105263158) internal successors, (968), 671 states have internal predecessors, (968), 226 states have call successors, (226), 40 states have call predecessors, (226), 79 states have return successors, (466), 354 states have call predecessors, (466), 226 states have call successors, (466) [2021-11-13 18:55:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1660 transitions. [2021-11-13 18:55:24,568 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1660 transitions. Word has length 128 [2021-11-13 18:55:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:24,570 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1660 transitions. [2021-11-13 18:55:24,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.0) internal successors, (175), 21 states have internal predecessors, (175), 9 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-11-13 18:55:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1660 transitions. [2021-11-13 18:55:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:55:24,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:24,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:24,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:24,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:55:24,795 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1508036094, now seen corresponding path program 1 times [2021-11-13 18:55:24,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:24,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073293206] [2021-11-13 18:55:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:24,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:24,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:55:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:55:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:55:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:55:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:55:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:55:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:55:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 18:55:25,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:25,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073293206] [2021-11-13 18:55:25,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073293206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:25,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:25,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:55:25,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499505824] [2021-11-13 18:55:25,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:25,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:55:25,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:55:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:55:25,095 INFO L87 Difference]: Start difference. First operand 1066 states and 1660 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:55:27,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:29,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:31,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:32,764 INFO L93 Difference]: Finished difference Result 1743 states and 2624 transitions. [2021-11-13 18:55:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:55:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-11-13 18:55:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:32,777 INFO L225 Difference]: With dead ends: 1743 [2021-11-13 18:55:32,778 INFO L226 Difference]: Without dead ends: 1046 [2021-11-13 18:55:32,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:55:32,785 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 307 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 146 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7091.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.72ms SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7332.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:32,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1086 Invalid, 842 Unknown, 0 Unchecked, 18.72ms Time], IncrementalHoareTripleChecker [146 Valid, 693 Invalid, 3 Unknown, 0 Unchecked, 7332.39ms Time] [2021-11-13 18:55:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-11-13 18:55:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1006. [2021-11-13 18:55:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 720 states have (on average 1.2722222222222221) internal successors, (916), 644 states have internal predecessors, (916), 206 states have call successors, (206), 40 states have call predecessors, (206), 79 states have return successors, (429), 321 states have call predecessors, (429), 206 states have call successors, (429) [2021-11-13 18:55:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1551 transitions. [2021-11-13 18:55:32,891 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1551 transitions. Word has length 111 [2021-11-13 18:55:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:32,892 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1551 transitions. [2021-11-13 18:55:32,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:55:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1551 transitions. [2021-11-13 18:55:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 18:55:32,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:32,903 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 4, 3, 3, 3, 3, 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] [2021-11-13 18:55:32,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:55:32,904 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash -825399348, now seen corresponding path program 1 times [2021-11-13 18:55:32,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:32,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26316436] [2021-11-13 18:55:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:32,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:55:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:55:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:55:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:55:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:55:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:55:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:55:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:55:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:55:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:55:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:55:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:55:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:55:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-13 18:55:33,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:33,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26316436] [2021-11-13 18:55:33,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26316436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:33,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120726765] [2021-11-13 18:55:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:33,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:33,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:33,307 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:33,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:55:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:55:33,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:33,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 18:55:33,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-11-13 18:55:33,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-13 18:55:34,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-13 18:55:34,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-13 18:55:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 100 proven. 5 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-13 18:55:34,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:34,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-13 18:55:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-13 18:55:34,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120726765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:34,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:34,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 14 [2021-11-13 18:55:34,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230078055] [2021-11-13 18:55:34,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:34,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:55:34,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:55:34,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:55:34,819 INFO L87 Difference]: Start difference. First operand 1006 states and 1551 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 10 states have internal predecessors, (157), 9 states have call successors, (36), 8 states have call predecessors, (36), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-11-13 18:55:36,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:38,723 INFO L93 Difference]: Finished difference Result 1762 states and 2661 transitions. [2021-11-13 18:55:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:55:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 10 states have internal predecessors, (157), 9 states have call successors, (36), 8 states have call predecessors, (36), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2021-11-13 18:55:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:38,737 INFO L225 Difference]: With dead ends: 1762 [2021-11-13 18:55:38,737 INFO L226 Difference]: Without dead ends: 1051 [2021-11-13 18:55:38,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 350 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:55:38,743 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 928 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 704 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3227.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.39ms SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3490.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:38,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 879 Invalid, 1605 Unknown, 0 Unchecked, 17.39ms Time], IncrementalHoareTripleChecker [704 Valid, 900 Invalid, 1 Unknown, 0 Unchecked, 3490.20ms Time] [2021-11-13 18:55:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-11-13 18:55:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 986. [2021-11-13 18:55:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 707 states have (on average 1.2786421499292786) internal successors, (904), 632 states have internal predecessors, (904), 201 states have call successors, (201), 40 states have call predecessors, (201), 77 states have return successors, (420), 313 states have call predecessors, (420), 201 states have call successors, (420) [2021-11-13 18:55:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1525 transitions. [2021-11-13 18:55:38,844 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1525 transitions. Word has length 164 [2021-11-13 18:55:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:38,845 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1525 transitions. [2021-11-13 18:55:38,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 10 states have internal predecessors, (157), 9 states have call successors, (36), 8 states have call predecessors, (36), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-11-13 18:55:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1525 transitions. [2021-11-13 18:55:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 18:55:38,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:38,851 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:38,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:39,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:39,079 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash -858072170, now seen corresponding path program 1 times [2021-11-13 18:55:39,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:39,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401858287] [2021-11-13 18:55:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:39,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:55:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:55:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:55:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:55:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:55:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:55:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:55:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:55:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:55:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:55:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:55:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:55:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:55:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-13 18:55:41,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:41,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401858287] [2021-11-13 18:55:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401858287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:41,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562261470] [2021-11-13 18:55:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:41,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:41,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:41,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c4a7413-2baf-499b-8e4b-7ad66a6a793e/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:55:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-13 18:55:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:42,883 INFO L354 Elim1Store]: treesize reduction 1357, result has 5.7 percent of original size [2021-11-13 18:55:42,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 37 case distinctions, treesize of input 6627 treesize of output 6391 [2021-11-13 18:55:48,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 18:55:50,183 INFO L354 Elim1Store]: treesize reduction 536, result has 38.0 percent of original size [2021-11-13 18:55:50,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 28 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 108 case distinctions, treesize of input 233 treesize of output 527 [2021-11-13 18:55:53,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-13 18:55:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-13 18:55:56,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-13 18:55:58,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 53 [2021-11-13 18:56:00,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-13 18:56:02,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-13 18:56:03,870 INFO L354 Elim1Store]: treesize reduction 119, result has 15.6 percent of original size [2021-11-13 18:56:03,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 23 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 77 [2021-11-13 18:56:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 50 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 53 [2021-11-13 18:56:07,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25