./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G --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 8c5f43b3e9ff1d4598a5a525fe9e716f863331c4c517b4b8adb0491943243286 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:48:12,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:48:12,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:48:12,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:48:12,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:48:12,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:48:12,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:48:12,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:48:12,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:48:12,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:48:12,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:48:12,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:48:12,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:48:12,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:48:12,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:48:12,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:48:12,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:48:12,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:48:12,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:48:12,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:48:12,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:48:12,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:48:12,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:48:12,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:48:12,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:48:12,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:48:12,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:48:12,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:48:12,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:48:12,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:48:12,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:48:12,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:48:12,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:48:12,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:48:12,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:48:12,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:48:12,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:48:12,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:48:12,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:48:12,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:48:12,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:48:12,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:48:12,785 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:48:12,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:48:12,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:48:12,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:48:12,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:48:12,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:48:12,788 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:48:12,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:48:12,789 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:48:12,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:48:12,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:48:12,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:48:12,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:48:12,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:48:12,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:48:12,791 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:48:12,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:48:12,792 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:48:12,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:48:12,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:48:12,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:48:12,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:48:12,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:48:12,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:48:12,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:48:12,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:48:12,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:48:12,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:48:12,795 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:48:12,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:48:12,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:48:12,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:48:12,798 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_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c5f43b3e9ff1d4598a5a525fe9e716f863331c4c517b4b8adb0491943243286 [2021-11-23 13:48:13,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:48:13,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:48:13,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:48:13,099 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:48:13,100 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:48:13,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c [2021-11-23 13:48:13,176 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/data/b30c081e9/f25bb9d2b3c74a6a8ca2a261f64dced5/FLAGb4722f4d1 [2021-11-23 13:48:13,604 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:48:13,606 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c [2021-11-23 13:48:13,618 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/data/b30c081e9/f25bb9d2b3c74a6a8ca2a261f64dced5/FLAGb4722f4d1 [2021-11-23 13:48:14,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/data/b30c081e9/f25bb9d2b3c74a6a8ca2a261f64dced5 [2021-11-23 13:48:14,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:48:14,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:48:14,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:48:14,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:48:14,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:48:14,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a5180e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14, skipping insertion in model container [2021-11-23 13:48:14,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:48:14,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:48:14,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c[319,332] [2021-11-23 13:48:14,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:48:14,208 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:48:14,218 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/sv-benchmarks/c/loops-crafted-1/mono-crafted_10.c[319,332] [2021-11-23 13:48:14,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:48:14,231 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:48:14,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14 WrapperNode [2021-11-23 13:48:14,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:48:14,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:48:14,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:48:14,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:48:14,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,257 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-11-23 13:48:14,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:48:14,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:48:14,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:48:14,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:48:14,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:48:14,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:48:14,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:48:14,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:48:14,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (1/1) ... [2021-11-23 13:48:14,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:48:14,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:14,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:48:14,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:48:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:48:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:48:14,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:48:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:48:14,418 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:48:14,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:48:14,520 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:48:14,526 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:48:14,527 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:48:14,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:14 BoogieIcfgContainer [2021-11-23 13:48:14,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:48:14,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:48:14,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:48:14,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:48:14,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:48:14" (1/3) ... [2021-11-23 13:48:14,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634a4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:14, skipping insertion in model container [2021-11-23 13:48:14,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:14" (2/3) ... [2021-11-23 13:48:14,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634a4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:14, skipping insertion in model container [2021-11-23 13:48:14,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:14" (3/3) ... [2021-11-23 13:48:14,567 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_10.c [2021-11-23 13:48:14,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:48:14,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:48:14,669 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:48:14,688 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 [2021-11-23 13:48:14,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:48:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:48:14,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:14,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:48:14,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:14,713 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-23 13:48:14,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:14,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980802559] [2021-11-23 13:48:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:14,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:14,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:14,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980802559] [2021-11-23 13:48:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980802559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:14,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:14,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:14,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258157682] [2021-11-23 13:48:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:14,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:48:14,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:14,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:48:14,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:48:14,855 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:14,865 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-23 13:48:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:48:14,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:48:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:14,882 INFO L225 Difference]: With dead ends: 21 [2021-11-23 13:48:14,882 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 13:48:14,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:48:14,888 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:14,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 13:48:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 13:48:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-23 13:48:14,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-23 13:48:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:14,916 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-23 13:48:14,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-23 13:48:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:48:14,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:14,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:48:14,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:48:14,918 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:14,919 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-23 13:48:14,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:14,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036613868] [2021-11-23 13:48:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:14,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:15,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:15,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036613868] [2021-11-23 13:48:15,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036613868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:15,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:15,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:15,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053222559] [2021-11-23 13:48:15,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:15,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:15,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:15,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:15,082 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:15,129 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-11-23 13:48:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:15,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:48:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:15,131 INFO L225 Difference]: With dead ends: 19 [2021-11-23 13:48:15,131 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 13:48:15,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:15,133 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:15,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 13:48:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-23 13:48:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-23 13:48:15,139 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-23 13:48:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:15,140 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-23 13:48:15,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:15,140 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-23 13:48:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:48:15,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:15,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:15,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:48:15,142 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-11-23 13:48:15,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:15,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080946268] [2021-11-23 13:48:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:15,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:15,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:15,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080946268] [2021-11-23 13:48:15,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080946268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150058212] [2021-11-23 13:48:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:15,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:15,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:15,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:15,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:48:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:15,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:48:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:15,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:15,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150058212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:15,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:15,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2021-11-23 13:48:15,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353509740] [2021-11-23 13:48:15,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:15,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:48:15,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:48:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:48:15,691 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-11-23 13:48:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:15,784 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-11-23 13:48:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:48:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 9 [2021-11-23 13:48:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:15,785 INFO L225 Difference]: With dead ends: 26 [2021-11-23 13:48:15,786 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 13:48:15,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:48:15,788 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:15,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 13:48:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 13:48:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 13:48:15,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-11-23 13:48:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:15,800 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 13:48:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-11-23 13:48:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 13:48:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:48:15,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:15,803 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:15,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:16,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:16,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-11-23 13:48:16,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:16,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86395092] [2021-11-23 13:48:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:16,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:16,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:16,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86395092] [2021-11-23 13:48:16,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86395092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070424061] [2021-11-23 13:48:16,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:48:16,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:16,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:16,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:48:16,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:48:16,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:48:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:48:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:16,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:16,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070424061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:16,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:16,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2021-11-23 13:48:16,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479433031] [2021-11-23 13:48:16,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:16,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:48:16,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:48:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:48:16,790 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:17,663 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-11-23 13:48:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:48:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 13:48:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:17,665 INFO L225 Difference]: With dead ends: 46 [2021-11-23 13:48:17,665 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 13:48:17,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:48:17,668 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:17,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 24 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:48:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 13:48:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 13:48:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-23 13:48:17,676 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2021-11-23 13:48:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:17,677 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-23 13:48:17,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-23 13:48:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:48:17,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:17,678 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:17,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:17,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:17,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash -51731342, now seen corresponding path program 3 times [2021-11-23 13:48:17,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:17,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500375591] [2021-11-23 13:48:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:17,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:18,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500375591] [2021-11-23 13:48:18,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500375591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331856623] [2021-11-23 13:48:18,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:48:18,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:18,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:18,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:48:18,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:48:18,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:48:18,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:48:18,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-23 13:48:18,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:48:18,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331856623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:18,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:48:18,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2021-11-23 13:48:18,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837403165] [2021-11-23 13:48:18,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:18,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:18,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:48:18,564 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:18,618 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-11-23 13:48:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 13:48:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:18,624 INFO L225 Difference]: With dead ends: 63 [2021-11-23 13:48:18,625 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 13:48:18,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:48:18,629 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:18,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 13:48:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2021-11-23 13:48:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-23 13:48:18,651 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36 [2021-11-23 13:48:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-23 13:48:18,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-23 13:48:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:48:18,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:18,653 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:18,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:18,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:18,879 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash -108989644, now seen corresponding path program 1 times [2021-11-23 13:48:18,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593012668] [2021-11-23 13:48:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:18,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:19,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:19,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593012668] [2021-11-23 13:48:19,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593012668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:19,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624346509] [2021-11-23 13:48:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:19,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:19,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:19,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:48:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:19,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:48:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:19,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:19,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624346509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:19,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:19,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 24 [2021-11-23 13:48:19,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428346623] [2021-11-23 13:48:19,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:19,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 13:48:19,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 13:48:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:48:19,858 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:25,899 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2021-11-23 13:48:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:48:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 13:48:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:25,901 INFO L225 Difference]: With dead ends: 88 [2021-11-23 13:48:25,901 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 13:48:25,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=393, Invalid=663, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:48:25,903 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:25,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 37 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:48:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 13:48:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-23 13:48:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-23 13:48:25,913 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 36 [2021-11-23 13:48:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-23 13:48:25,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-23 13:48:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:48:25,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:25,917 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:25,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:26,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 13:48:26,141 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:26,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1647036101, now seen corresponding path program 2 times [2021-11-23 13:48:26,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:26,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451881101] [2021-11-23 13:48:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:26,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:26,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451881101] [2021-11-23 13:48:26,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451881101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188723421] [2021-11-23 13:48:26,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:48:26,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:26,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:26,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:48:26,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:48:26,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:48:26,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 13:48:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:27,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:29,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188723421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:29,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:29,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 26] total 49 [2021-11-23 13:48:29,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666841894] [2021-11-23 13:48:29,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:29,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 13:48:29,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 13:48:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1726, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 13:48:29,649 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:09,351 WARN L227 SmtUtils]: Spent 28.16s on a formula simplification. DAG size of input: 200 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:49:44,031 WARN L227 SmtUtils]: Spent 25.26s on a formula simplification. DAG size of input: 201 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:50:18,325 WARN L227 SmtUtils]: Spent 22.73s on a formula simplification. DAG size of input: 191 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:50:59,886 WARN L227 SmtUtils]: Spent 33.47s on a formula simplification. DAG size of input: 192 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:51:39,844 WARN L227 SmtUtils]: Spent 25.04s on a formula simplification. DAG size of input: 182 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:52:13,470 WARN L227 SmtUtils]: Spent 23.43s on a formula simplification. DAG size of input: 183 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:52:56,622 WARN L227 SmtUtils]: Spent 15.67s on a formula simplification. DAG size of input: 173 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:53:29,827 WARN L227 SmtUtils]: Spent 22.20s on a formula simplification. DAG size of input: 174 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:54:05,004 WARN L227 SmtUtils]: Spent 11.90s on a formula simplification. DAG size of input: 164 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:54:34,368 WARN L227 SmtUtils]: Spent 14.35s on a formula simplification. DAG size of input: 165 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:55:03,581 WARN L227 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 155 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:55:29,610 WARN L227 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 156 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:55:59,052 WARN L227 SmtUtils]: Spent 10.73s on a formula simplification. DAG size of input: 146 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:56:19,025 WARN L227 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 147 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:56:56,105 WARN L227 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 137 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:57:13,290 WARN L227 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 138 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 14:01:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:01:54,915 INFO L93 Difference]: Finished difference Result 145 states and 169 transitions. [2021-11-23 14:01:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-23 14:01:54,916 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 14:01:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:01:54,917 INFO L225 Difference]: With dead ends: 145 [2021-11-23 14:01:54,918 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 14:01:54,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 806.0s TimeCoverageRelationStatistics Valid=3690, Invalid=8435, Unknown=85, NotChecked=0, Total=12210 [2021-11-23 14:01:54,925 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 154 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:01:54,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 84 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 14:01:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 14:01:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-11-23 14:01:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:01:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-11-23 14:01:54,941 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 69 [2021-11-23 14:01:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:01:54,942 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-11-23 14:01:54,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:01:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-11-23 14:01:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 14:01:54,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:01:54,947 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:01:54,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 14:01:55,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:01:55,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:01:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:01:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 420755547, now seen corresponding path program 3 times [2021-11-23 14:01:55,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:01:55,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069638437] [2021-11-23 14:01:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:01:55,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:01:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:01:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 85 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:01:56,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:01:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069638437] [2021-11-23 14:01:56,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069638437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:01:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33189919] [2021-11-23 14:01:56,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:01:56,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:01:56,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:01:56,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:01:56,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 14:01:56,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 14:01:56,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:01:56,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 14:01:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:01:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-23 14:01:57,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:02:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-23 14:02:01,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33189919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:02:01,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:02:01,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 8] total 56 [2021-11-23 14:02:01,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448686875] [2021-11-23 14:02:01,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:02:01,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 14:02:01,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 14:02:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 14:02:01,504 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:06,597 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2021-11-23 14:02:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 14:02:06,597 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-23 14:02:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:06,599 INFO L225 Difference]: With dead ends: 164 [2021-11-23 14:02:06,599 INFO L226 Difference]: Without dead ends: 155 [2021-11-23 14:02:06,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1188, Invalid=9524, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 14:02:06,604 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 187 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 5910 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 6012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 5910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:06,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 119 Invalid, 6012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 5910 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 14:02:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-23 14:02:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-11-23 14:02:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-11-23 14:02:06,622 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 135 [2021-11-23 14:02:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:06,622 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-11-23 14:02:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-11-23 14:02:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 14:02:06,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:06,626 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 44, 5, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:06,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 14:02:06,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:02:06,832 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1171799301, now seen corresponding path program 4 times [2021-11-23 14:02:06,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:06,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305828682] [2021-11-23 14:02:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:06,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 14:02:08,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305828682] [2021-11-23 14:02:08,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305828682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:02:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683461031] [2021-11-23 14:02:08,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:02:08,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:02:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:02:08,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:02:08,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad7d4d0-e02e-45ea-ad9d-f25ab64d1a6b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 14:02:08,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:02:08,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:02:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-23 14:02:08,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:02:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:09,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:02:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:14,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683461031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:02:14,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:02:14,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 51, 51] total 101 [2021-11-23 14:02:14,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76487798] [2021-11-23 14:02:14,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:02:14,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 14:02:14,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:14,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 14:02:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2694, Invalid=7406, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 14:02:14,069 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 101 states, 101 states have (on average 3.01980198019802) internal successors, (305), 101 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:19,098 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 33) 4294967296) 5000000) (< (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 22 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 41 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296) 5000000) (< (mod (+ 30 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 37) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296) 5000000) (< (mod (+ 35 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 32 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296) 5000000) (< (mod (+ 40 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296) 5000000) (< (mod (+ 29 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296) 5000000) (< (mod (+ 42 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 44 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296) 5000000) (< (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) 5000000) (< (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 47 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 23 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 45) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 27) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 38) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 48) 4294967296) 5000000) (< (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 39) 4294967296) 5000000) (< (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) 5000000) (< (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 31 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296) 5000000) (< (mod (+ 21 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296) 5000000) (< (mod (+ 46 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 25) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 43) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296) 5000000)) is different from false [2021-11-23 14:02:21,116 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 33) 4294967296) 5000000) (< (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 22 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 41 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296) 5000000) (< (mod (+ 30 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 37) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296) 5000000) (< (mod (+ 35 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 32 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296) 5000000) (< (mod (+ 40 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296) 5000000) (< (mod (+ 29 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296) 5000000) (< (mod (+ 42 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 44 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296) 5000000) (< (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 47 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 23 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 45) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 27) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 38) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 48) 4294967296) 5000000) (< (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 39) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) 5000000) (< (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ 31 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296) 5000000) (< (mod (+ 21 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296) 5000000) (< (mod (+ 46 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 25) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 43) 4294967296) 5000000) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296) 5000000)) is different from false