./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_4.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_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/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_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/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_768ed914-b0ce-4ea3-a12e-d7418621af1c/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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:34:24,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:34:24,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:34:24,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:34:24,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:34:24,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:34:24,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:34:24,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:34:24,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:34:24,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:34:24,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:34:24,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:34:24,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:34:24,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:34:24,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:34:24,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:34:24,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:34:24,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:34:24,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:34:24,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:34:24,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:34:24,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:34:24,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:34:24,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:34:24,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:34:24,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:34:24,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:34:24,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:34:24,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:34:24,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:34:24,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:34:24,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:34:24,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:34:24,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:34:24,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:34:24,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:34:24,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:34:24,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:34:24,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:34:24,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:34:24,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:34:24,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:34:24,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:34:24,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:34:24,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:34:24,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:34:24,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:34:24,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:34:24,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:34:24,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:34:24,873 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:34:24,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:34:24,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:34:24,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:34:24,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:34:24,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:34:24,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:34:24,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:34:24,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:34:24,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:34:24,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:34:24,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:34:24,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:34:24,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:34:24,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:34:24,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:34:24,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:34:24,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:34:24,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:34:24,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:34:24,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:34:24,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:34:24,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:34:24,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:34:24,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:34:24,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:34:24,879 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_768ed914-b0ce-4ea3-a12e-d7418621af1c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2021-11-13 17:34:25,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:34:25,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:34:25,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:34:25,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:34:25,163 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:34:25,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-13 17:34:25,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/data/c7e1ba0d0/5bf84eb49c334774b5dca34a738be54e/FLAG4483cf992 [2021-11-13 17:34:25,696 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:34:25,696 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-13 17:34:25,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/data/c7e1ba0d0/5bf84eb49c334774b5dca34a738be54e/FLAG4483cf992 [2021-11-13 17:34:26,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/data/c7e1ba0d0/5bf84eb49c334774b5dca34a738be54e [2021-11-13 17:34:26,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:34:26,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:34:26,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:34:26,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:34:26,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:34:26,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8bbef88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26, skipping insertion in model container [2021-11-13 17:34:26,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:34:26,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:34:26,305 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_768ed914-b0ce-4ea3-a12e-d7418621af1c/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-13 17:34:26,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:34:26,324 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:34:26,335 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_768ed914-b0ce-4ea3-a12e-d7418621af1c/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-13 17:34:26,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:34:26,351 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:34:26,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26 WrapperNode [2021-11-13 17:34:26,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:34:26,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:34:26,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:34:26,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:34:26,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:34:26,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:34:26,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:34:26,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:34:26,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:34:26,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:34:26,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:34:26,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:34:26,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (1/1) ... [2021-11-13 17:34:26,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:34:26,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:26,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:34:26,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:34:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:34:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:34:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:34:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:34:26,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:34:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:34:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:34:26,667 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:34:26,667 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 17:34:26,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:34:26 BoogieIcfgContainer [2021-11-13 17:34:26,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:34:26,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:34:26,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:34:26,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:34:26,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:34:26" (1/3) ... [2021-11-13 17:34:26,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17995cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:34:26, skipping insertion in model container [2021-11-13 17:34:26,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:34:26" (2/3) ... [2021-11-13 17:34:26,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17995cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:34:26, skipping insertion in model container [2021-11-13 17:34:26,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:34:26" (3/3) ... [2021-11-13 17:34:26,678 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2021-11-13 17:34:26,684 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:34:26,684 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:34:26,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:34:26,747 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 17:34:26,747 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:34:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 17:34:26,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:26,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:26,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash 212257263, now seen corresponding path program 1 times [2021-11-13 17:34:26,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:26,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393595457] [2021-11-13 17:34:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:26,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:26,954 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 17:34:26,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:26,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393595457] [2021-11-13 17:34:26,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393595457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:34:26,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:34:26,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:34:26,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428060895] [2021-11-13 17:34:26,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:34:26,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:34:26,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:34:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:34:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:34:27,003 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 17:34:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:27,073 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-13 17:34:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:34:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 17:34:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:27,081 INFO L225 Difference]: With dead ends: 41 [2021-11-13 17:34:27,082 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 17:34:27,085 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 17:34:27,091 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.32ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:27,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 12 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 46.32ms Time] [2021-11-13 17:34:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 17:34:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2021-11-13 17:34:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-13 17:34:27,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-11-13 17:34:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:27,140 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-13 17:34:27,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 17:34:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-13 17:34:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 17:34:27,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:27,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:27,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:34:27,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1562582865, now seen corresponding path program 1 times [2021-11-13 17:34:27,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:27,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802237216] [2021-11-13 17:34:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:27,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:34:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802237216] [2021-11-13 17:34:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802237216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:34:27,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951677567] [2021-11-13 17:34:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:27,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:27,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:27,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:34:27,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:34:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:27,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:34:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:34:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:34:27,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:34:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:34:27,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951677567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:34:27,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:34:27,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-13 17:34:27,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446479006] [2021-11-13 17:34:27,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:34:27,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:34:27,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:34:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:34:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:34:27,507 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:27,580 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-11-13 17:34:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:34:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 17:34:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:27,582 INFO L225 Difference]: With dead ends: 55 [2021-11-13 17:34:27,583 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 17:34:27,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:34:27,586 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:27,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 26 Invalid, 38 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [12 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 52.57ms Time] [2021-11-13 17:34:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 17:34:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 19. [2021-11-13 17:34:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-13 17:34:27,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2021-11-13 17:34:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:27,600 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-13 17:34:27,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-13 17:34:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 17:34:27,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:27,608 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:27,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:34:27,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:27,822 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:27,823 INFO L85 PathProgramCache]: Analyzing trace with hash -10610165, now seen corresponding path program 2 times [2021-11-13 17:34:27,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:27,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714383526] [2021-11-13 17:34:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:27,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 17:34:27,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:27,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714383526] [2021-11-13 17:34:27,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714383526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:34:27,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:34:27,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:34:27,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751374353] [2021-11-13 17:34:27,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:34:27,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:34:27,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:34:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:34:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:34:27,976 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:28,022 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-13 17:34:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:34:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-13 17:34:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:28,023 INFO L225 Difference]: With dead ends: 26 [2021-11-13 17:34:28,024 INFO L226 Difference]: Without dead ends: 22 [2021-11-13 17:34:28,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:34:28,026 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:28,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 34.61ms Time] [2021-11-13 17:34:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-13 17:34:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-13 17:34:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 17:34:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-13 17:34:28,032 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2021-11-13 17:34:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:28,032 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-13 17:34:28,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-13 17:34:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 17:34:28,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:28,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:28,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:34:28,034 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash -907607845, now seen corresponding path program 1 times [2021-11-13 17:34:28,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:28,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722871670] [2021-11-13 17:34:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:28,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 17:34:28,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722871670] [2021-11-13 17:34:28,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722871670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:34:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944176751] [2021-11-13 17:34:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:28,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:28,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:34:28,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:34:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:28,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:34:28,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:34:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:34:28,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:34:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:34:28,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944176751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:34:28,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:34:28,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2021-11-13 17:34:28,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642431250] [2021-11-13 17:34:28,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:34:28,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 17:34:28,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:34:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 17:34:28,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:34:28,354 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:28,557 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-11-13 17:34:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 17:34:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-13 17:34:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:28,559 INFO L225 Difference]: With dead ends: 89 [2021-11-13 17:34:28,559 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 17:34:28,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:34:28,562 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:28,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 38 Invalid, 105 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [44 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 89.08ms Time] [2021-11-13 17:34:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 17:34:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-11-13 17:34:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 17:34:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-13 17:34:28,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 20 [2021-11-13 17:34:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:28,573 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-13 17:34:28,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:28,573 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-13 17:34:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 17:34:28,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:28,575 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:28,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:34:28,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:28,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:28,803 INFO L85 PathProgramCache]: Analyzing trace with hash 933738495, now seen corresponding path program 2 times [2021-11-13 17:34:28,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:28,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408317563] [2021-11-13 17:34:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:28,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 17:34:29,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:29,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408317563] [2021-11-13 17:34:29,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408317563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:34:29,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55307330] [2021-11-13 17:34:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:34:29,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:29,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:29,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:34:29,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:34:29,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:34:29,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:34:29,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 17:34:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:34:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 17:34:29,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:34:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 17:34:29,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55307330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:34:29,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:34:29,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-13 17:34:29,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180672947] [2021-11-13 17:34:29,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:34:29,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 17:34:29,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:34:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 17:34:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:34:29,647 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:29,888 INFO L93 Difference]: Finished difference Result 206 states and 219 transitions. [2021-11-13 17:34:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 17:34:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-13 17:34:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:29,898 INFO L225 Difference]: With dead ends: 206 [2021-11-13 17:34:29,899 INFO L226 Difference]: Without dead ends: 169 [2021-11-13 17:34:29,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:34:29,902 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 270 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.20ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:29,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 77 Invalid, 192 Unknown, 0 Unchecked, 6.20ms Time], IncrementalHoareTripleChecker [78 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 162.26ms Time] [2021-11-13 17:34:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-13 17:34:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 84. [2021-11-13 17:34:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-13 17:34:29,931 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 59 [2021-11-13 17:34:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:29,932 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-13 17:34:29,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-13 17:34:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 17:34:29,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:29,937 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:29,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:34:30,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:30,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1105658393, now seen corresponding path program 3 times [2021-11-13 17:34:30,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:30,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111080344] [2021-11-13 17:34:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:30,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 17:34:30,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:30,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111080344] [2021-11-13 17:34:30,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111080344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:34:30,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736234593] [2021-11-13 17:34:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:34:30,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:30,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:30,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:34:30,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:34:30,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-13 17:34:30,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:34:30,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 17:34:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:34:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-13 17:34:30,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:34:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-13 17:34:31,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736234593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:34:31,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:34:31,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 38 [2021-11-13 17:34:31,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256518789] [2021-11-13 17:34:31,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:34:31,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 17:34:31,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:34:31,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 17:34:31,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 17:34:31,484 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:34:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:32,348 INFO L93 Difference]: Finished difference Result 262 states and 297 transitions. [2021-11-13 17:34:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-13 17:34:32,348 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 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 83 [2021-11-13 17:34:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:32,350 INFO L225 Difference]: With dead ends: 262 [2021-11-13 17:34:32,350 INFO L226 Difference]: Without dead ends: 177 [2021-11-13 17:34:32,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1316, Invalid=2466, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 17:34:32,357 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 284 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.23ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:32,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 92 Invalid, 303 Unknown, 0 Unchecked, 5.23ms Time], IncrementalHoareTripleChecker [122 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 249.61ms Time] [2021-11-13 17:34:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-13 17:34:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-11-13 17:34:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2021-11-13 17:34:32,382 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 83 [2021-11-13 17:34:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:32,382 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2021-11-13 17:34:32,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 17:34:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2021-11-13 17:34:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-13 17:34:32,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:32,385 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:32,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:34:32,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:32,586 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash -341612077, now seen corresponding path program 4 times [2021-11-13 17:34:32,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:32,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340156699] [2021-11-13 17:34:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:32,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-13 17:34:33,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:33,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340156699] [2021-11-13 17:34:33,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340156699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:34:33,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804649455] [2021-11-13 17:34:33,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 17:34:33,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:33,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:34:33,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:34:33,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 17:34:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:34:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 17:34:33,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:34:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-13 17:34:33,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:34:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-13 17:34:35,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804649455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:34:35,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:34:35,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2021-11-13 17:34:35,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875256843] [2021-11-13 17:34:35,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:34:35,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-13 17:34:35,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:34:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-13 17:34:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 17:34:35,591 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 17:34:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:36,473 INFO L93 Difference]: Finished difference Result 578 states and 613 transitions. [2021-11-13 17:34:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-13 17:34:36,474 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 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 175 [2021-11-13 17:34:36,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:36,477 INFO L225 Difference]: With dead ends: 578 [2021-11-13 17:34:36,477 INFO L226 Difference]: Without dead ends: 469 [2021-11-13 17:34:36,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 17:34:36,482 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1091 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.03ms SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 406.22ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:36,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1091 Valid, 188 Invalid, 605 Unknown, 0 Unchecked, 10.03ms Time], IncrementalHoareTripleChecker [297 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 406.22ms Time] [2021-11-13 17:34:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-13 17:34:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 244. [2021-11-13 17:34:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.008230452674897) internal successors, (245), 243 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:34:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2021-11-13 17:34:36,502 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 175 [2021-11-13 17:34:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:36,503 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2021-11-13 17:34:36,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 17:34:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2021-11-13 17:34:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-13 17:34:36,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:36,508 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:36,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:34:36,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 17:34:36,730 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1238761585, now seen corresponding path program 5 times [2021-11-13 17:34:36,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:36,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741826840] [2021-11-13 17:34:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:36,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-13 17:34:38,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:34:38,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741826840] [2021-11-13 17:34:38,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741826840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:34:38,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430985551] [2021-11-13 17:34:38,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 17:34:38,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:38,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:38,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:34:38,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:36:54,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-11-13 17:36:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:36:54,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-13 17:36:54,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:36:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-13 17:36:55,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:37:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-13 17:37:00,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430985551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:37:00,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:37:00,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 137 [2021-11-13 17:37:00,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049474991] [2021-11-13 17:37:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:37:00,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-11-13 17:37:00,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-11-13 17:37:00,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2021-11-13 17:37:00,509 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 137 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:37:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:05,475 INFO L93 Difference]: Finished difference Result 1190 states and 1259 transitions. [2021-11-13 17:37:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-11-13 17:37:05,475 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 137 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-13 17:37:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:05,486 INFO L225 Difference]: With dead ends: 1190 [2021-11-13 17:37:05,486 INFO L226 Difference]: Without dead ends: 1081 [2021-11-13 17:37:05,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2021-11-13 17:37:05,494 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3923 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 733.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3923 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.18ms SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 953.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:05,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3923 Valid, 459 Invalid, 1487 Unknown, 0 Unchecked, 21.18ms Time], IncrementalHoareTripleChecker [837 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 953.15ms Time] [2021-11-13 17:37:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-13 17:37:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 380. [2021-11-13 17:37:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.0052770448548813) internal successors, (381), 379 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 17:37:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 381 transitions. [2021-11-13 17:37:05,527 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 381 transitions. Word has length 243 [2021-11-13 17:37:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:05,528 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 381 transitions. [2021-11-13 17:37:05,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 137 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:37:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 381 transitions. [2021-11-13 17:37:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-13 17:37:05,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:05,539 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:05,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 17:37:05,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:05,766 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1624846073, now seen corresponding path program 6 times [2021-11-13 17:37:05,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:05,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558923497] [2021-11-13 17:37:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:05,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19707 backedges. 0 proven. 17956 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-13 17:37:12,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:12,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558923497] [2021-11-13 17:37:12,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558923497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:12,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616535645] [2021-11-13 17:37:12,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 17:37:12,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:12,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:12,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_768ed914-b0ce-4ea3-a12e-d7418621af1c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process