./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/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_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/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 64bit --witnessprinter.graph.data.programhash 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:29:23,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:29:23,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:29:24,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:29:24,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:29:24,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:29:24,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:29:24,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:29:24,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:29:24,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:29:24,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:29:24,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:29:24,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:29:24,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:29:24,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:29:24,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:29:24,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:29:24,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:29:24,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:29:24,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:29:24,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:29:24,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:29:24,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:29:24,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:29:24,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:29:24,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:29:24,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:29:24,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:29:24,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:29:24,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:29:24,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:29:24,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:29:24,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:29:24,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:29:24,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:29:24,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:29:24,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:29:24,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:29:24,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:29:24,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:29:24,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:29:24,062 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-23 12:29:24,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:29:24,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:29:24,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:29:24,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:29:24,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:29:24,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:29:24,088 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:29:24,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:29:24,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:29:24,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:29:24,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:29:24,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:29:24,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:29:24,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:29:24,090 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:29:24,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:29:24,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:29:24,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:29:24,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:29:24,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:29:24,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:29:24,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:29:24,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:29:24,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:29:24,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:29:24,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:29:24,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:29:24,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:29:24,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:29:24,094 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_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 [2021-11-23 12:29:24,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:29:24,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:29:24,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:29:24,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:29:24,346 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:29:24,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2021-11-23 12:29:24,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/data/04a1bb617/5a3dde2ce4534fc7b4b57326ea6e81d2/FLAG8ef644fdd [2021-11-23 12:29:25,252 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:29:25,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2021-11-23 12:29:25,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/data/04a1bb617/5a3dde2ce4534fc7b4b57326ea6e81d2/FLAG8ef644fdd [2021-11-23 12:29:25,784 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/data/04a1bb617/5a3dde2ce4534fc7b4b57326ea6e81d2 [2021-11-23 12:29:25,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:29:25,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:29:25,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:29:25,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:29:25,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:29:25,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:29:25" (1/1) ... [2021-11-23 12:29:25,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:25, skipping insertion in model container [2021-11-23 12:29:25,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:29:25" (1/1) ... [2021-11-23 12:29:25,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:29:25,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:29:27,189 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_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2021-11-23 12:29:27,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:29:27,270 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:29:27,519 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_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2021-11-23 12:29:27,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:29:27,566 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:29:27,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27 WrapperNode [2021-11-23 12:29:27,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:29:27,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:29:27,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:29:27,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:29:27,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:27,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:28,229 INFO L137 Inliner]: procedures = 147, calls = 851, calls flagged for inlining = 186, calls inlined = 1762, statements flattened = 23695 [2021-11-23 12:29:28,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:29:28,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:29:28,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:29:28,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:29:28,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:28,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:28,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:28,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:28,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:29,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:29,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:29,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:29:29,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:29:29,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:29:29,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:29:29,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (1/1) ... [2021-11-23 12:29:29,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:29:29,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:29,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:29:29,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:29:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 12:29:29,426 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 12:29:29,427 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 12:29:29,427 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-23 12:29:29,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 12:29:29,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 12:29:29,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:29:29,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:29:29,428 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 12:29:29,428 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 12:29:29,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:29:29,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:29:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_bus_detach [2021-11-23 12:29:29,429 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_bus_detach [2021-11-23 12:29:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:29:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 12:29:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 12:29:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 12:29:29,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 12:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 12:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 12:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 12:29:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:29:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 12:29:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:29:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:29:30,155 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:29:30,157 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:29:41,704 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:29:41,735 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:29:41,735 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 12:29:41,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:29:41 BoogieIcfgContainer [2021-11-23 12:29:41,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:29:41,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:29:41,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:29:41,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:29:41,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:29:25" (1/3) ... [2021-11-23 12:29:41,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d6a43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:29:41, skipping insertion in model container [2021-11-23 12:29:41,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:27" (2/3) ... [2021-11-23 12:29:41,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d6a43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:29:41, skipping insertion in model container [2021-11-23 12:29:41,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:29:41" (3/3) ... [2021-11-23 12:29:41,751 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2021-11-23 12:29:41,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:29:41,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 12:29:41,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:29:41,838 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 12:29:41,838 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 12:29:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 4062 states, 4048 states have (on average 1.3992094861660078) internal successors, (5664), 4052 states have internal predecessors, (5664), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 12:29:41,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:41,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:41,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1845539052, now seen corresponding path program 1 times [2021-11-23 12:29:41,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:41,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363776525] [2021-11-23 12:29:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:41,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:42,391 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 12:29:42,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:42,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363776525] [2021-11-23 12:29:42,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363776525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:42,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:42,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:29:42,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058345737] [2021-11-23 12:29:42,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:42,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:29:42,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:29:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:29:42,451 INFO L87 Difference]: Start difference. First operand has 4062 states, 4048 states have (on average 1.3992094861660078) internal successors, (5664), 4052 states have internal predecessors, (5664), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 12:29:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:42,733 INFO L93 Difference]: Finished difference Result 8117 states and 11350 transitions. [2021-11-23 12:29:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:29:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 12:29:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:42,777 INFO L225 Difference]: With dead ends: 8117 [2021-11-23 12:29:42,777 INFO L226 Difference]: Without dead ends: 2516 [2021-11-23 12:29:42,806 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 12:29:42,816 INFO L933 BasicCegarLoop]: 5576 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, 5576 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 12:29:42,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5576 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-11-23 12:29:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2516. [2021-11-23 12:29:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2503 states have (on average 1.3727526967638835) internal successors, (3436), 2506 states have internal predecessors, (3436), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3448 transitions. [2021-11-23 12:29:43,051 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3448 transitions. Word has length 30 [2021-11-23 12:29:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:43,052 INFO L470 AbstractCegarLoop]: Abstraction has 2516 states and 3448 transitions. [2021-11-23 12:29:43,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 12:29:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3448 transitions. [2021-11-23 12:29:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 12:29:43,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:43,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:43,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:29:43,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash 878274202, now seen corresponding path program 1 times [2021-11-23 12:29:43,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:43,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578482805] [2021-11-23 12:29:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:43,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:43,266 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 12:29:43,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:43,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578482805] [2021-11-23 12:29:43,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578482805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:43,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:43,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:43,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307325500] [2021-11-23 12:29:43,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:43,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:43,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:43,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:43,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:43,270 INFO L87 Difference]: Start difference. First operand 2516 states and 3448 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 12:29:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:43,590 INFO L93 Difference]: Finished difference Result 5426 states and 7450 transitions. [2021-11-23 12:29:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 12:29:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:43,622 INFO L225 Difference]: With dead ends: 5426 [2021-11-23 12:29:43,622 INFO L226 Difference]: Without dead ends: 2929 [2021-11-23 12:29:43,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:43,639 INFO L933 BasicCegarLoop]: 3447 mSDtfsCounter, 586 mSDsluCounter, 3402 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 6849 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:43,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 6849 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2021-11-23 12:29:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2928. [2021-11-23 12:29:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2915 states have (on average 1.3749571183533447) internal successors, (4008), 2918 states have internal predecessors, (4008), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4020 transitions. [2021-11-23 12:29:43,899 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4020 transitions. Word has length 30 [2021-11-23 12:29:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:43,900 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 4020 transitions. [2021-11-23 12:29:43,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 12:29:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4020 transitions. [2021-11-23 12:29:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:29:43,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:43,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:43,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:29:43,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1849161191, now seen corresponding path program 1 times [2021-11-23 12:29:43,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478288315] [2021-11-23 12:29:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:43,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:44,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:44,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478288315] [2021-11-23 12:29:44,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478288315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:44,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:44,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:29:44,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136099671] [2021-11-23 12:29:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:44,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:29:44,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:44,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:29:44,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:29:44,077 INFO L87 Difference]: Start difference. First operand 2928 states and 4020 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:44,422 INFO L93 Difference]: Finished difference Result 8683 states and 11950 transitions. [2021-11-23 12:29:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:29:44,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 12:29:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:44,460 INFO L225 Difference]: With dead ends: 8683 [2021-11-23 12:29:44,461 INFO L226 Difference]: Without dead ends: 5774 [2021-11-23 12:29:44,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:44,473 INFO L933 BasicCegarLoop]: 4590 mSDtfsCounter, 5029 mSDsluCounter, 13113 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5031 SdHoareTripleChecker+Valid, 17703 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:44,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5031 Valid, 17703 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5774 states. [2021-11-23 12:29:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5774 to 2931. [2021-11-23 12:29:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2918 states have (on average 1.3745716244002741) internal successors, (4011), 2921 states have internal predecessors, (4011), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 4023 transitions. [2021-11-23 12:29:44,608 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 4023 transitions. Word has length 51 [2021-11-23 12:29:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:44,609 INFO L470 AbstractCegarLoop]: Abstraction has 2931 states and 4023 transitions. [2021-11-23 12:29:44,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 4023 transitions. [2021-11-23 12:29:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 12:29:44,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:44,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:44,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:29:44,612 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1466218357, now seen corresponding path program 1 times [2021-11-23 12:29:44,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:44,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708722973] [2021-11-23 12:29:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:44,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:44,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708722973] [2021-11-23 12:29:44,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708722973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:44,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:44,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:29:44,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065770166] [2021-11-23 12:29:44,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:44,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:44,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:44,762 INFO L87 Difference]: Start difference. First operand 2931 states and 4023 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 12:29:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:44,978 INFO L93 Difference]: Finished difference Result 2990 states and 4105 transitions. [2021-11-23 12:29:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:44,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 52 [2021-11-23 12:29:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:44,998 INFO L225 Difference]: With dead ends: 2990 [2021-11-23 12:29:44,998 INFO L226 Difference]: Without dead ends: 2986 [2021-11-23 12:29:45,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 12:29:45,002 INFO L933 BasicCegarLoop]: 3452 mSDtfsCounter, 3023 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3023 SdHoareTripleChecker+Valid, 3836 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:45,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3023 Valid, 3836 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2021-11-23 12:29:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2927. [2021-11-23 12:29:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2916 states have (on average 1.3741426611796983) internal successors, (4007), 2917 states have internal predecessors, (4007), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4019 transitions. [2021-11-23 12:29:45,124 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4019 transitions. Word has length 52 [2021-11-23 12:29:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:45,124 INFO L470 AbstractCegarLoop]: Abstraction has 2927 states and 4019 transitions. [2021-11-23 12:29:45,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 12:29:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4019 transitions. [2021-11-23 12:29:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 12:29:45,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:45,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:45,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:29:45,133 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -610200576, now seen corresponding path program 1 times [2021-11-23 12:29:45,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:45,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282349569] [2021-11-23 12:29:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:45,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:45,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282349569] [2021-11-23 12:29:45,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282349569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:45,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:45,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:29:45,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870472914] [2021-11-23 12:29:45,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:45,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:29:45,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:45,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:29:45,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:45,325 INFO L87 Difference]: Start difference. First operand 2927 states and 4019 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:29:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:46,290 INFO L93 Difference]: Finished difference Result 10866 states and 15043 transitions. [2021-11-23 12:29:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:29:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-23 12:29:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:46,345 INFO L225 Difference]: With dead ends: 10866 [2021-11-23 12:29:46,345 INFO L226 Difference]: Without dead ends: 7958 [2021-11-23 12:29:46,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:29:46,358 INFO L933 BasicCegarLoop]: 4970 mSDtfsCounter, 9985 mSDsluCounter, 21589 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9985 SdHoareTripleChecker+Valid, 26559 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:46,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9985 Valid, 26559 Invalid, 153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:29:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-11-23 12:29:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 2933. [2021-11-23 12:29:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2922 states have (on average 1.3733744010951403) internal successors, (4013), 2923 states have internal predecessors, (4013), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4025 transitions. [2021-11-23 12:29:46,553 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4025 transitions. Word has length 90 [2021-11-23 12:29:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:46,554 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 4025 transitions. [2021-11-23 12:29:46,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 12:29:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4025 transitions. [2021-11-23 12:29:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 12:29:46,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:46,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:46,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:29:46,562 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1201340553, now seen corresponding path program 1 times [2021-11-23 12:29:46,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:46,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741487998] [2021-11-23 12:29:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:46,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:46,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741487998] [2021-11-23 12:29:46,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741487998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:46,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:46,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:29:46,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678651818] [2021-11-23 12:29:46,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:46,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:29:46,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:29:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:46,737 INFO L87 Difference]: Start difference. First operand 2933 states and 4025 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 12:29:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:47,598 INFO L93 Difference]: Finished difference Result 10892 states and 15069 transitions. [2021-11-23 12:29:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:29:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 12:29:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:47,668 INFO L225 Difference]: With dead ends: 10892 [2021-11-23 12:29:47,668 INFO L226 Difference]: Without dead ends: 7978 [2021-11-23 12:29:47,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:29:47,682 INFO L933 BasicCegarLoop]: 5274 mSDtfsCounter, 9460 mSDsluCounter, 22478 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9460 SdHoareTripleChecker+Valid, 27752 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:47,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9460 Valid, 27752 Invalid, 167 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:29:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2021-11-23 12:29:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 2935. [2021-11-23 12:29:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2924 states have (on average 1.3731190150478796) internal successors, (4015), 2925 states have internal predecessors, (4015), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 4027 transitions. [2021-11-23 12:29:48,008 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 4027 transitions. Word has length 96 [2021-11-23 12:29:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:48,010 INFO L470 AbstractCegarLoop]: Abstraction has 2935 states and 4027 transitions. [2021-11-23 12:29:48,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 12:29:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 4027 transitions. [2021-11-23 12:29:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 12:29:48,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:48,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:48,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:29:48,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1707423349, now seen corresponding path program 1 times [2021-11-23 12:29:48,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:48,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173470580] [2021-11-23 12:29:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:48,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:48,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:48,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173470580] [2021-11-23 12:29:48,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173470580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:48,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:48,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:29:48,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402363300] [2021-11-23 12:29:48,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:48,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:29:48,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:29:48,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:29:48,257 INFO L87 Difference]: Start difference. First operand 2935 states and 4027 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 12:29:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:48,970 INFO L93 Difference]: Finished difference Result 9048 states and 12476 transitions. [2021-11-23 12:29:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:29:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 12:29:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:48,999 INFO L225 Difference]: With dead ends: 9048 [2021-11-23 12:29:48,999 INFO L226 Difference]: Without dead ends: 6132 [2021-11-23 12:29:49,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:29:49,013 INFO L933 BasicCegarLoop]: 5046 mSDtfsCounter, 3790 mSDsluCounter, 12586 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3792 SdHoareTripleChecker+Valid, 17632 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:49,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3792 Valid, 17632 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6132 states. [2021-11-23 12:29:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6132 to 2938. [2021-11-23 12:29:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2927 states have (on average 1.372736590365562) internal successors, (4018), 2928 states have internal predecessors, (4018), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4030 transitions. [2021-11-23 12:29:49,248 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4030 transitions. Word has length 96 [2021-11-23 12:29:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:49,249 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4030 transitions. [2021-11-23 12:29:49,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 12:29:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4030 transitions. [2021-11-23 12:29:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 12:29:49,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:49,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:49,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:29:49,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1641253866, now seen corresponding path program 1 times [2021-11-23 12:29:49,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:49,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091309325] [2021-11-23 12:29:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:49,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:49,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091309325] [2021-11-23 12:29:49,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091309325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:49,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:49,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:29:49,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158187394] [2021-11-23 12:29:49,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:49,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:29:49,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:49,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:29:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:29:49,581 INFO L87 Difference]: Start difference. First operand 2938 states and 4030 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:50,927 INFO L93 Difference]: Finished difference Result 12761 states and 17754 transitions. [2021-11-23 12:29:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:29:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-23 12:29:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:50,971 INFO L225 Difference]: With dead ends: 12761 [2021-11-23 12:29:50,973 INFO L226 Difference]: Without dead ends: 9842 [2021-11-23 12:29:50,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:29:50,989 INFO L933 BasicCegarLoop]: 4540 mSDtfsCounter, 7131 mSDsluCounter, 13684 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7136 SdHoareTripleChecker+Valid, 18224 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:50,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7136 Valid, 18224 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:29:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9842 states. [2021-11-23 12:29:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9842 to 2941. [2021-11-23 12:29:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2930 states have (on average 1.3723549488054607) internal successors, (4021), 2931 states have internal predecessors, (4021), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 4033 transitions. [2021-11-23 12:29:51,309 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 4033 transitions. Word has length 102 [2021-11-23 12:29:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:51,309 INFO L470 AbstractCegarLoop]: Abstraction has 2941 states and 4033 transitions. [2021-11-23 12:29:51,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 4033 transitions. [2021-11-23 12:29:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 12:29:51,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:51,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:51,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:29:51,321 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1300464914, now seen corresponding path program 1 times [2021-11-23 12:29:51,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:51,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293662591] [2021-11-23 12:29:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:51,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:51,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:51,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293662591] [2021-11-23 12:29:51,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293662591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:51,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:51,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:29:51,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663322324] [2021-11-23 12:29:51,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:51,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:29:51,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:29:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:29:51,559 INFO L87 Difference]: Start difference. First operand 2941 states and 4033 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:29:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:52,951 INFO L93 Difference]: Finished difference Result 8455 states and 11715 transitions. [2021-11-23 12:29:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:29:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 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 108 [2021-11-23 12:29:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:52,973 INFO L225 Difference]: With dead ends: 8455 [2021-11-23 12:29:52,973 INFO L226 Difference]: Without dead ends: 5533 [2021-11-23 12:29:52,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:29:52,984 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 2356 mSDsluCounter, 7801 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2358 SdHoareTripleChecker+Valid, 12115 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:52,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2358 Valid, 12115 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 12:29:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-11-23 12:29:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 2951. [2021-11-23 12:29:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2940 states have (on average 1.3710884353741497) internal successors, (4031), 2941 states have internal predecessors, (4031), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 4043 transitions. [2021-11-23 12:29:53,200 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 4043 transitions. Word has length 108 [2021-11-23 12:29:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:53,201 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 4043 transitions. [2021-11-23 12:29:53,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:29:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 4043 transitions. [2021-11-23 12:29:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 12:29:53,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:53,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:53,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:29:53,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:53,212 INFO L85 PathProgramCache]: Analyzing trace with hash -154915736, now seen corresponding path program 1 times [2021-11-23 12:29:53,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:53,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830777740] [2021-11-23 12:29:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:53,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:53,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830777740] [2021-11-23 12:29:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830777740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:53,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:53,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:53,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017029102] [2021-11-23 12:29:53,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:53,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:53,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:53,412 INFO L87 Difference]: Start difference. First operand 2951 states and 4043 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 12:29:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:53,735 INFO L93 Difference]: Finished difference Result 6251 states and 8562 transitions. [2021-11-23 12:29:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-23 12:29:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:53,749 INFO L225 Difference]: With dead ends: 6251 [2021-11-23 12:29:53,749 INFO L226 Difference]: Without dead ends: 3319 [2021-11-23 12:29:53,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:53,758 INFO L933 BasicCegarLoop]: 3753 mSDtfsCounter, 409 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 7070 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:53,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 7070 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-11-23 12:29:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 2951. [2021-11-23 12:29:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2940 states have (on average 1.370408163265306) internal successors, (4029), 2941 states have internal predecessors, (4029), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 4041 transitions. [2021-11-23 12:29:53,972 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 4041 transitions. Word has length 114 [2021-11-23 12:29:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:53,972 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 4041 transitions. [2021-11-23 12:29:53,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 12:29:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 4041 transitions. [2021-11-23 12:29:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 12:29:53,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:53,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:53,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:29:53,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1846112068, now seen corresponding path program 1 times [2021-11-23 12:29:53,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:53,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696306270] [2021-11-23 12:29:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:53,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:54,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696306270] [2021-11-23 12:29:54,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696306270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:54,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:54,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:29:54,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615119752] [2021-11-23 12:29:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:54,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:29:54,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:54,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:29:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:54,317 INFO L87 Difference]: Start difference. First operand 2951 states and 4041 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:56,953 INFO L93 Difference]: Finished difference Result 12540 states and 17343 transitions. [2021-11-23 12:29:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 12:29:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-23 12:29:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:56,999 INFO L225 Difference]: With dead ends: 12540 [2021-11-23 12:29:56,999 INFO L226 Difference]: Without dead ends: 9608 [2021-11-23 12:29:57,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:29:57,013 INFO L933 BasicCegarLoop]: 4356 mSDtfsCounter, 8609 mSDsluCounter, 22554 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8612 SdHoareTripleChecker+Valid, 26910 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:57,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8612 Valid, 26910 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 12:29:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-11-23 12:29:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 3001. [2021-11-23 12:29:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2990 states have (on average 1.368561872909699) internal successors, (4092), 2991 states have internal predecessors, (4092), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 4104 transitions. [2021-11-23 12:29:57,380 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 4104 transitions. Word has length 116 [2021-11-23 12:29:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:57,381 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 4104 transitions. [2021-11-23 12:29:57,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 4104 transitions. [2021-11-23 12:29:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 12:29:57,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:57,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:57,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:29:57,393 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1253976196, now seen corresponding path program 1 times [2021-11-23 12:29:57,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:57,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080380585] [2021-11-23 12:29:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:57,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:57,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:57,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080380585] [2021-11-23 12:29:57,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080380585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:57,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:57,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:57,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976952786] [2021-11-23 12:29:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:57,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:57,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:57,565 INFO L87 Difference]: Start difference. First operand 3001 states and 4104 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 12:29:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:57,952 INFO L93 Difference]: Finished difference Result 6340 states and 8672 transitions. [2021-11-23 12:29:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:57,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-23 12:29:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:57,966 INFO L225 Difference]: With dead ends: 6340 [2021-11-23 12:29:57,967 INFO L226 Difference]: Without dead ends: 3358 [2021-11-23 12:29:57,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:57,977 INFO L933 BasicCegarLoop]: 3750 mSDtfsCounter, 416 mSDsluCounter, 3292 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 7042 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:57,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 7042 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-11-23 12:29:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 3001. [2021-11-23 12:29:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2990 states have (on average 1.3678929765886287) internal successors, (4090), 2991 states have internal predecessors, (4090), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:29:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 4102 transitions. [2021-11-23 12:29:58,235 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 4102 transitions. Word has length 128 [2021-11-23 12:29:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:58,235 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 4102 transitions. [2021-11-23 12:29:58,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 12:29:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 4102 transitions. [2021-11-23 12:29:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 12:29:58,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:58,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:58,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:29:58,248 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:58,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1214761448, now seen corresponding path program 1 times [2021-11-23 12:29:58,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:58,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478042495] [2021-11-23 12:29:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:58,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:29:59,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:59,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478042495] [2021-11-23 12:29:59,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478042495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:59,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:59,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:59,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506701853] [2021-11-23 12:29:59,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:59,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:59,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:59,155 INFO L87 Difference]: Start difference. First operand 3001 states and 4102 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:59,913 INFO L93 Difference]: Finished difference Result 5987 states and 8189 transitions. [2021-11-23 12:29:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:59,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-23 12:29:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:59,925 INFO L225 Difference]: With dead ends: 5987 [2021-11-23 12:29:59,925 INFO L226 Difference]: Without dead ends: 3002 [2021-11-23 12:29:59,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:59,933 INFO L933 BasicCegarLoop]: 3440 mSDtfsCounter, 0 mSDsluCounter, 3384 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:59,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6824 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:29:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-11-23 12:30:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 3002. [2021-11-23 12:30:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 2991 states have (on average 1.367769976596456) internal successors, (4091), 2992 states have internal predecessors, (4091), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4103 transitions. [2021-11-23 12:30:00,177 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4103 transitions. Word has length 130 [2021-11-23 12:30:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:00,177 INFO L470 AbstractCegarLoop]: Abstraction has 3002 states and 4103 transitions. [2021-11-23 12:30:00,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4103 transitions. [2021-11-23 12:30:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-23 12:30:00,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:00,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:00,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:30:00,190 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:00,190 INFO L85 PathProgramCache]: Analyzing trace with hash 579066974, now seen corresponding path program 1 times [2021-11-23 12:30:00,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:00,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162984520] [2021-11-23 12:30:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:00,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:30:00,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:00,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162984520] [2021-11-23 12:30:00,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162984520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:00,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762908963] [2021-11-23 12:30:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:00,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:00,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:00,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:30:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:30:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:01,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:30:01,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762908963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:01,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:30:01,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-23 12:30:01,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008578296] [2021-11-23 12:30:01,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:01,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:30:01,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:01,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:30:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:30:01,495 INFO L87 Difference]: Start difference. First operand 3002 states and 4103 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:02,892 INFO L93 Difference]: Finished difference Result 11041 states and 15238 transitions. [2021-11-23 12:30:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:30:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-23 12:30:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:02,921 INFO L225 Difference]: With dead ends: 11041 [2021-11-23 12:30:02,921 INFO L226 Difference]: Without dead ends: 8059 [2021-11-23 12:30:02,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:30:02,931 INFO L933 BasicCegarLoop]: 4270 mSDtfsCounter, 7353 mSDsluCounter, 12747 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7356 SdHoareTripleChecker+Valid, 17017 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:02,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7356 Valid, 17017 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:30:02,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-11-23 12:30:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 3002. [2021-11-23 12:30:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 2991 states have (on average 1.367769976596456) internal successors, (4091), 2992 states have internal predecessors, (4091), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4103 transitions. [2021-11-23 12:30:03,225 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4103 transitions. Word has length 131 [2021-11-23 12:30:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:03,225 INFO L470 AbstractCegarLoop]: Abstraction has 3002 states and 4103 transitions. [2021-11-23 12:30:03,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4103 transitions. [2021-11-23 12:30:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 12:30:03,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:03,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:03,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 12:30:03,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 12:30:03,463 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash 477356074, now seen corresponding path program 1 times [2021-11-23 12:30:03,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:03,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102375048] [2021-11-23 12:30:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:03,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:03,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102375048] [2021-11-23 12:30:03,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102375048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:03,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:30:03,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:30:03,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881941643] [2021-11-23 12:30:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:03,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:30:03,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:30:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:30:03,609 INFO L87 Difference]: Start difference. First operand 3002 states and 4103 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:30:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:03,887 INFO L93 Difference]: Finished difference Result 5985 states and 8187 transitions. [2021-11-23 12:30:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:30:03,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-23 12:30:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:03,899 INFO L225 Difference]: With dead ends: 5985 [2021-11-23 12:30:03,899 INFO L226 Difference]: Without dead ends: 3003 [2021-11-23 12:30:03,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:30:03,908 INFO L933 BasicCegarLoop]: 3440 mSDtfsCounter, 0 mSDsluCounter, 3435 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6875 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:03,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6875 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:30:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-11-23 12:30:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 3003. [2021-11-23 12:30:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 2992 states have (on average 1.3676470588235294) internal successors, (4092), 2993 states have internal predecessors, (4092), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 4104 transitions. [2021-11-23 12:30:04,174 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 4104 transitions. Word has length 144 [2021-11-23 12:30:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:04,174 INFO L470 AbstractCegarLoop]: Abstraction has 3003 states and 4104 transitions. [2021-11-23 12:30:04,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:30:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 4104 transitions. [2021-11-23 12:30:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 12:30:04,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:04,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:04,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:30:04,186 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1878449176, now seen corresponding path program 1 times [2021-11-23 12:30:04,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:04,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930671129] [2021-11-23 12:30:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:04,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:04,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:04,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930671129] [2021-11-23 12:30:04,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930671129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:04,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:30:04,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:30:04,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548744574] [2021-11-23 12:30:04,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:04,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:30:04,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:30:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:30:04,316 INFO L87 Difference]: Start difference. First operand 3003 states and 4104 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:30:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:04,549 INFO L93 Difference]: Finished difference Result 5988 states and 8190 transitions. [2021-11-23 12:30:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:30:04,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-23 12:30:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:04,559 INFO L225 Difference]: With dead ends: 5988 [2021-11-23 12:30:04,559 INFO L226 Difference]: Without dead ends: 3005 [2021-11-23 12:30:04,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:30:04,566 INFO L933 BasicCegarLoop]: 3439 mSDtfsCounter, 1 mSDsluCounter, 3436 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6875 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:04,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 6875 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:30:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-11-23 12:30:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 3004. [2021-11-23 12:30:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 2993 states have (on average 1.3675242231874374) internal successors, (4093), 2994 states have internal predecessors, (4093), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 4105 transitions. [2021-11-23 12:30:04,820 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 4105 transitions. Word has length 144 [2021-11-23 12:30:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:04,821 INFO L470 AbstractCegarLoop]: Abstraction has 3004 states and 4105 transitions. [2021-11-23 12:30:04,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:30:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 4105 transitions. [2021-11-23 12:30:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 12:30:04,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:04,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:04,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:30:04,835 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash 105689540, now seen corresponding path program 1 times [2021-11-23 12:30:04,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:04,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705564831] [2021-11-23 12:30:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:04,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:04,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705564831] [2021-11-23 12:30:04,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705564831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827789085] [2021-11-23 12:30:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:04,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:04,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:04,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:30:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:30:05,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:30:06,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:30:06,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827789085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:06,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:30:06,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 12:30:06,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198384395] [2021-11-23 12:30:06,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:06,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:30:06,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:06,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:30:06,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:30:06,039 INFO L87 Difference]: Start difference. First operand 3004 states and 4105 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:06,335 INFO L93 Difference]: Finished difference Result 5991 states and 8193 transitions. [2021-11-23 12:30:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:30:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-23 12:30:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:06,347 INFO L225 Difference]: With dead ends: 5991 [2021-11-23 12:30:06,348 INFO L226 Difference]: Without dead ends: 3007 [2021-11-23 12:30:06,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:30:06,354 INFO L933 BasicCegarLoop]: 3438 mSDtfsCounter, 3 mSDsluCounter, 6869 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10307 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:06,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 10307 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:30:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-11-23 12:30:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 3006. [2021-11-23 12:30:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 2995 states have (on average 1.3672787979966612) internal successors, (4095), 2996 states have internal predecessors, (4095), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 4107 transitions. [2021-11-23 12:30:06,622 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 4107 transitions. Word has length 146 [2021-11-23 12:30:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 4107 transitions. [2021-11-23 12:30:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 4107 transitions. [2021-11-23 12:30:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 12:30:06,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:06,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:06,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:30:06,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 12:30:06,859 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:06,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1644029570, now seen corresponding path program 1 times [2021-11-23 12:30:06,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:06,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788475091] [2021-11-23 12:30:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:06,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:06,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788475091] [2021-11-23 12:30:06,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788475091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778867004] [2021-11-23 12:30:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:06,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:06,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:07,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:30:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:07,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:30:07,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:30:07,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:30:07,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778867004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:08,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:30:08,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 12:30:08,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620194366] [2021-11-23 12:30:08,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:08,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:30:08,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:30:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:30:08,001 INFO L87 Difference]: Start difference. First operand 3006 states and 4107 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:08,260 INFO L93 Difference]: Finished difference Result 5998 states and 8200 transitions. [2021-11-23 12:30:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:30:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-23 12:30:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:08,268 INFO L225 Difference]: With dead ends: 5998 [2021-11-23 12:30:08,269 INFO L226 Difference]: Without dead ends: 3012 [2021-11-23 12:30:08,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:30:08,275 INFO L933 BasicCegarLoop]: 3438 mSDtfsCounter, 9 mSDsluCounter, 6867 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10305 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:08,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10305 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:30:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-11-23 12:30:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 3008. [2021-11-23 12:30:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 2997 states have (on average 1.3670337003670336) internal successors, (4097), 2998 states have internal predecessors, (4097), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4109 transitions. [2021-11-23 12:30:08,536 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4109 transitions. Word has length 146 [2021-11-23 12:30:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:08,537 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4109 transitions. [2021-11-23 12:30:08,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4109 transitions. [2021-11-23 12:30:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 12:30:08,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:08,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:08,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:30:08,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 12:30:08,763 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:08,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1774918720, now seen corresponding path program 1 times [2021-11-23 12:30:08,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:08,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687767351] [2021-11-23 12:30:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:08,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:08,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:08,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687767351] [2021-11-23 12:30:08,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687767351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:08,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826911327] [2021-11-23 12:30:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:08,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:08,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:08,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:08,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:30:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:30:09,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:09,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:30:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:10,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826911327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:30:10,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:30:10,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 12:30:10,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523000549] [2021-11-23 12:30:10,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:30:10,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:30:10,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:30:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:30:10,153 INFO L87 Difference]: Start difference. First operand 3008 states and 4109 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 12:30:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:10,378 INFO L93 Difference]: Finished difference Result 6002 states and 8206 transitions. [2021-11-23 12:30:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:30:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-23 12:30:10,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:10,389 INFO L225 Difference]: With dead ends: 6002 [2021-11-23 12:30:10,389 INFO L226 Difference]: Without dead ends: 3014 [2021-11-23 12:30:10,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:30:10,396 INFO L933 BasicCegarLoop]: 3439 mSDtfsCounter, 4 mSDsluCounter, 10308 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13747 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:10,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 13747 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:30:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-11-23 12:30:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3014. [2021-11-23 12:30:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3003 states have (on average 1.3663003663003663) internal successors, (4103), 3004 states have internal predecessors, (4103), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 4115 transitions. [2021-11-23 12:30:10,660 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 4115 transitions. Word has length 146 [2021-11-23 12:30:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:10,661 INFO L470 AbstractCegarLoop]: Abstraction has 3014 states and 4115 transitions. [2021-11-23 12:30:10,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 12:30:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 4115 transitions. [2021-11-23 12:30:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 12:30:10,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:10,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:10,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:30:10,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:10,897 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1209529940, now seen corresponding path program 2 times [2021-11-23 12:30:10,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:10,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616900046] [2021-11-23 12:30:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:10,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:30:11,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616900046] [2021-11-23 12:30:11,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616900046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157456441] [2021-11-23 12:30:11,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:30:11,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:11,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:11,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:11,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:30:12,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 12:30:12,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:30:12,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 2412 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:30:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 12:30:12,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:30:12,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157456441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:12,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:30:12,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-23 12:30:12,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673542290] [2021-11-23 12:30:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:12,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:30:12,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:30:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:30:12,822 INFO L87 Difference]: Start difference. First operand 3014 states and 4115 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:13,515 INFO L93 Difference]: Finished difference Result 6009 states and 8211 transitions. [2021-11-23 12:30:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:30:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-23 12:30:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:13,524 INFO L225 Difference]: With dead ends: 6009 [2021-11-23 12:30:13,524 INFO L226 Difference]: Without dead ends: 3015 [2021-11-23 12:30:13,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:30:13,531 INFO L933 BasicCegarLoop]: 3440 mSDtfsCounter, 0 mSDsluCounter, 3384 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:13,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6824 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:30:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-11-23 12:30:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 3015. [2021-11-23 12:30:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3004 states have (on average 1.3661784287616512) internal successors, (4104), 3005 states have internal predecessors, (4104), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4116 transitions. [2021-11-23 12:30:13,800 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4116 transitions. Word has length 152 [2021-11-23 12:30:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:13,800 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 4116 transitions. [2021-11-23 12:30:13,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4116 transitions. [2021-11-23 12:30:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 12:30:13,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:13,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:13,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:30:14,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:14,023 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:14,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash -855080143, now seen corresponding path program 1 times [2021-11-23 12:30:14,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447616100] [2021-11-23 12:30:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:14,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:30:14,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447616100] [2021-11-23 12:30:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447616100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253290038] [2021-11-23 12:30:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:14,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:14,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:14,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:14,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:30:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:30:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:30:15,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:30:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:30:15,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253290038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:30:15,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:30:15,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-23 12:30:15,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114338282] [2021-11-23 12:30:15,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:30:15,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 12:30:15,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 12:30:15,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:30:15,436 INFO L87 Difference]: Start difference. First operand 3015 states and 4116 transitions. Second operand has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 12:30:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:15,719 INFO L93 Difference]: Finished difference Result 6022 states and 8229 transitions. [2021-11-23 12:30:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:30:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 0 states have call successors, (0), 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 153 [2021-11-23 12:30:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:15,726 INFO L225 Difference]: With dead ends: 6022 [2021-11-23 12:30:15,726 INFO L226 Difference]: Without dead ends: 3027 [2021-11-23 12:30:15,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:30:15,731 INFO L933 BasicCegarLoop]: 3439 mSDtfsCounter, 10 mSDsluCounter, 10308 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13747 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:15,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13747 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:30:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2021-11-23 12:30:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 3027. [2021-11-23 12:30:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3016 states have (on average 1.3647214854111407) internal successors, (4116), 3017 states have internal predecessors, (4116), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 4128 transitions. [2021-11-23 12:30:15,992 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 4128 transitions. Word has length 153 [2021-11-23 12:30:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:15,992 INFO L470 AbstractCegarLoop]: Abstraction has 3027 states and 4128 transitions. [2021-11-23 12:30:15,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 12:30:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 4128 transitions. [2021-11-23 12:30:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-23 12:30:15,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:16,000 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:16,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:30:16,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 12:30:16,227 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1937907703, now seen corresponding path program 2 times [2021-11-23 12:30:16,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606189437] [2021-11-23 12:30:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:16,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:30:16,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:16,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606189437] [2021-11-23 12:30:16,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606189437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:16,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354945948] [2021-11-23 12:30:16,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:30:16,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:16,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:16,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:30:17,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 12:30:17,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:30:17,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2412 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:30:17,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 12:30:17,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:30:17,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354945948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:17,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:30:17,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2021-11-23 12:30:17,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926045507] [2021-11-23 12:30:17,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:17,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:30:17,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:30:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:30:17,855 INFO L87 Difference]: Start difference. First operand 3027 states and 4128 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:18,222 INFO L93 Difference]: Finished difference Result 6047 states and 8261 transitions. [2021-11-23 12:30:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:30:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-23 12:30:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:18,229 INFO L225 Difference]: With dead ends: 6047 [2021-11-23 12:30:18,229 INFO L226 Difference]: Without dead ends: 3040 [2021-11-23 12:30:18,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:30:18,234 INFO L933 BasicCegarLoop]: 3432 mSDtfsCounter, 0 mSDsluCounter, 3384 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6816 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:18,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6816 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:30:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2021-11-23 12:30:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 3040. [2021-11-23 12:30:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3029 states have (on average 1.3631561571475734) internal successors, (4129), 3030 states have internal predecessors, (4129), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4141 transitions. [2021-11-23 12:30:18,485 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4141 transitions. Word has length 165 [2021-11-23 12:30:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:18,485 INFO L470 AbstractCegarLoop]: Abstraction has 3040 states and 4141 transitions. [2021-11-23 12:30:18,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4141 transitions. [2021-11-23 12:30:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-23 12:30:18,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:18,489 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:18,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:30:18,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:18,690 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash -457342557, now seen corresponding path program 1 times [2021-11-23 12:30:18,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302660392] [2021-11-23 12:30:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:18,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:30:18,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:18,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302660392] [2021-11-23 12:30:18,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302660392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:18,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82994927] [2021-11-23 12:30:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:18,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:18,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:18,935 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:19,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:30:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:30:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:30:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:30:19,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:30:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:30:20,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82994927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:30:20,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:30:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-23 12:30:20,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253102908] [2021-11-23 12:30:20,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:30:20,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 12:30:20,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 12:30:20,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:30:20,304 INFO L87 Difference]: Start difference. First operand 3040 states and 4141 transitions. Second operand has 25 states, 25 states have (on average 7.6) internal successors, (190), 25 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:20,602 INFO L93 Difference]: Finished difference Result 6084 states and 8297 transitions. [2021-11-23 12:30:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:30:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.6) internal successors, (190), 25 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-23 12:30:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:20,611 INFO L225 Difference]: With dead ends: 6084 [2021-11-23 12:30:20,611 INFO L226 Difference]: Without dead ends: 3064 [2021-11-23 12:30:20,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:30:20,617 INFO L933 BasicCegarLoop]: 3439 mSDtfsCounter, 22 mSDsluCounter, 13744 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17183 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:20,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 17183 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:30:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-23 12:30:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 3064. [2021-11-23 12:30:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3053 states have (on average 1.360301342941369) internal successors, (4153), 3054 states have internal predecessors, (4153), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:30:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 4165 transitions. [2021-11-23 12:30:20,803 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 4165 transitions. Word has length 167 [2021-11-23 12:30:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:20,803 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 4165 transitions. [2021-11-23 12:30:20,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.6) internal successors, (190), 25 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 4165 transitions. [2021-11-23 12:30:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-23 12:30:20,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:20,810 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:20,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:30:21,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:21,035 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:21,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1755967219, now seen corresponding path program 2 times [2021-11-23 12:30:21,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:21,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651381300] [2021-11-23 12:30:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:21,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:30:21,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651381300] [2021-11-23 12:30:21,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651381300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:30:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950696147] [2021-11-23 12:30:21,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:30:21,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:30:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:30:21,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:30:21,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:40:04,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:40:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:40:04,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 12:40:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:40:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:40:04,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:40:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:40:05,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950696147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:40:05,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:40:05,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 33 [2021-11-23 12:40:05,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98706511] [2021-11-23 12:40:05,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:40:05,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 12:40:05,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:40:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 12:40:05,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 12:40:05,306 INFO L87 Difference]: Start difference. First operand 3064 states and 4165 transitions. Second operand has 33 states, 33 states have (on average 6.303030303030303) internal successors, (208), 33 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:40:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:40:05,718 INFO L93 Difference]: Finished difference Result 6124 states and 8333 transitions. [2021-11-23 12:40:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 12:40:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.303030303030303) internal successors, (208), 33 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-23 12:40:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:40:05,726 INFO L225 Difference]: With dead ends: 6124 [2021-11-23 12:40:05,726 INFO L226 Difference]: Without dead ends: 3080 [2021-11-23 12:40:05,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 12:40:05,732 INFO L933 BasicCegarLoop]: 3439 mSDtfsCounter, 30 mSDsluCounter, 13744 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17183 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:40:05,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 17183 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:40:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-11-23 12:40:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3080. [2021-11-23 12:40:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3069 states have (on average 1.3584229390681004) internal successors, (4169), 3070 states have internal predecessors, (4169), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 12:40:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4181 transitions. [2021-11-23 12:40:05,961 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4181 transitions. Word has length 191 [2021-11-23 12:40:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:40:05,961 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 4181 transitions. [2021-11-23 12:40:05,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.303030303030303) internal successors, (208), 33 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:40:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4181 transitions. [2021-11-23 12:40:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-23 12:40:05,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:40:05,966 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:40:06,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:40:06,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:40:06,171 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:40:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:40:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1110374445, now seen corresponding path program 3 times [2021-11-23 12:40:06,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:40:06,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463183296] [2021-11-23 12:40:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:40:06,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:40:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:40:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2021-11-23 12:40:10,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:40:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463183296] [2021-11-23 12:40:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463183296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:40:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040534912] [2021-11-23 12:40:10,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:40:10,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:40:10,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:40:10,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:40:10,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6895fc6a-8524-4c78-bfeb-177d16b2ef4a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process