./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c8a07fe1a25f7f87a80e2b435a79d4715298ae698f37888069e22026322224ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:11:50,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:11:50,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:11:50,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:11:50,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:11:50,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:11:50,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:11:50,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:11:50,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:11:50,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:11:50,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:11:50,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:11:50,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:11:50,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:11:50,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:11:50,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:11:50,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:11:51,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:11:51,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:11:51,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:11:51,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:11:51,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:11:51,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:11:51,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:11:51,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:11:51,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:11:51,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:11:51,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:11:51,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:11:51,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:11:51,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:11:51,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:11:51,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:11:51,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:11:51,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:11:51,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:11:51,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:11:51,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:11:51,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:11:51,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:11:51,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:11:51,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:11:51,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:11:51,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:11:51,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:11:51,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:11:51,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:11:51,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:11:51,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:11:51,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:11:51,090 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:11:51,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:11:51,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:11:51,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:11:51,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:11:51,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:11:51,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:11:51,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:11:51,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:11:51,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:11:51,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:11:51,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:11:51,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:11:51,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:51,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:11:51,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:11:51,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:11:51,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:11:51,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:11:51,097 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:11:51,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:11:51,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:11:51,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:11:51,099 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_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8a07fe1a25f7f87a80e2b435a79d4715298ae698f37888069e22026322224ef [2021-11-13 18:11:51,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:11:51,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:11:51,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:11:51,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:11:51,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:11:51,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2021-11-13 18:11:51,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/d305f0aed/5982508799e8447aa39510c1df323321/FLAG2032846e6 [2021-11-13 18:11:52,552 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:11:52,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2021-11-13 18:11:52,597 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/d305f0aed/5982508799e8447aa39510c1df323321/FLAG2032846e6 [2021-11-13 18:11:52,991 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/d305f0aed/5982508799e8447aa39510c1df323321 [2021-11-13 18:11:52,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:11:52,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:11:52,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:52,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:11:53,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:11:53,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:52" (1/1) ... [2021-11-13 18:11:53,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6859edfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:53, skipping insertion in model container [2021-11-13 18:11:53,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:52" (1/1) ... [2021-11-13 18:11:53,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:11:53,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:11:53,857 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[95017,95030] [2021-11-13 18:11:54,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:54,482 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:11:54,633 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[95017,95030] [2021-11-13 18:11:54,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:54,873 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:11:54,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54 WrapperNode [2021-11-13 18:11:54,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:54,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:54,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:11:54,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:11:54,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:54,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:55,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:11:55,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:11:55,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:11:55,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:11:55,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:11:55,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:11:55,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:11:55,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (1/1) ... [2021-11-13 18:11:55,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:55,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:11:55,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:11:55,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:11:55,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:11:55,449 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2021-11-13 18:11:55,449 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2021-11-13 18:11:55,449 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2021-11-13 18:11:55,449 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2021-11-13 18:11:55,450 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:11:55,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:11:55,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:11:55,450 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-11-13 18:11:55,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-11-13 18:11:55,451 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-13 18:11:55,451 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-13 18:11:55,451 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-13 18:11:55,451 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-13 18:11:55,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:11:55,452 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-13 18:11:55,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-13 18:11:55,452 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2021-11-13 18:11:55,452 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2021-11-13 18:11:55,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:11:55,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:11:55,453 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:11:55,453 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:11:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2021-11-13 18:11:55,454 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2021-11-13 18:11:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:11:55,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:11:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-13 18:11:55,455 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-13 18:11:55,455 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-13 18:11:55,455 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-13 18:11:55,455 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2021-11-13 18:11:55,455 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2021-11-13 18:11:55,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:11:55,456 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:11:55,456 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2021-11-13 18:11:55,456 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2021-11-13 18:11:55,456 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2021-11-13 18:11:55,457 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2021-11-13 18:11:55,457 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:11:55,457 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:11:55,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:11:55,458 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2021-11-13 18:11:55,458 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2021-11-13 18:11:55,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:11:55,459 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:11:55,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:11:55,459 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2021-11-13 18:11:55,459 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2021-11-13 18:11:55,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:11:55,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:11:56,120 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:11:59,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:11:59,525 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:11:59,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:11:59 BoogieIcfgContainer [2021-11-13 18:11:59,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:11:59,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:11:59,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:11:59,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:11:59,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:11:52" (1/3) ... [2021-11-13 18:11:59,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f82bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:11:59, skipping insertion in model container [2021-11-13 18:11:59,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:54" (2/3) ... [2021-11-13 18:11:59,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f82bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:11:59, skipping insertion in model container [2021-11-13 18:11:59,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:11:59" (3/3) ... [2021-11-13 18:11:59,545 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2021-11-13 18:11:59,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:11:59,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:11:59,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:11:59,651 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:11:59,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:11:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 376 states, 283 states have (on average 1.4240282685512367) internal successors, (403), 291 states have internal predecessors, (403), 71 states have call successors, (71), 21 states have call predecessors, (71), 20 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-13 18:11:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:11:59,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:59,702 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:59,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash 505290590, now seen corresponding path program 1 times [2021-11-13 18:11:59,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:59,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072879226] [2021-11-13 18:11:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:59,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:00,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:00,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:00,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:00,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:00,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:12:00,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:00,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072879226] [2021-11-13 18:12:00,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072879226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:00,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:00,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:12:00,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288007674] [2021-11-13 18:12:00,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:00,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:12:00,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:12:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:12:00,891 INFO L87 Difference]: Start difference. First operand has 376 states, 283 states have (on average 1.4240282685512367) internal successors, (403), 291 states have internal predecessors, (403), 71 states have call successors, (71), 21 states have call predecessors, (71), 20 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:12:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:02,746 INFO L93 Difference]: Finished difference Result 1094 states and 1609 transitions. [2021-11-13 18:12:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:12:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 48 [2021-11-13 18:12:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:02,788 INFO L225 Difference]: With dead ends: 1094 [2021-11-13 18:12:02,789 INFO L226 Difference]: Without dead ends: 699 [2021-11-13 18:12:02,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:12:02,816 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 604 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1222.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.93ms SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1489.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:02,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1753 Invalid, 626 Unknown, 0 Unchecked, 54.93ms Time], IncrementalHoareTripleChecker [273 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 1489.84ms Time] [2021-11-13 18:12:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-13 18:12:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 675. [2021-11-13 18:12:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 526 states have (on average 1.420152091254753) internal successors, (747), 529 states have internal predecessors, (747), 113 states have call successors, (113), 36 states have call predecessors, (113), 35 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-13 18:12:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 972 transitions. [2021-11-13 18:12:02,999 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 972 transitions. Word has length 48 [2021-11-13 18:12:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:03,001 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 972 transitions. [2021-11-13 18:12:03,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:12:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 972 transitions. [2021-11-13 18:12:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:12:03,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:03,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:03,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:12:03,015 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash 390664964, now seen corresponding path program 1 times [2021-11-13 18:12:03,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:03,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918434991] [2021-11-13 18:12:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:03,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:03,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:03,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:03,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:03,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:12:03,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:03,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918434991] [2021-11-13 18:12:03,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918434991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:03,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:03,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:12:03,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679170778] [2021-11-13 18:12:03,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:03,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:12:03,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:03,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:12:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:12:03,481 INFO L87 Difference]: Start difference. First operand 675 states and 972 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:12:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:04,787 INFO L93 Difference]: Finished difference Result 1495 states and 2155 transitions. [2021-11-13 18:12:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:12:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 72 [2021-11-13 18:12:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:04,800 INFO L225 Difference]: With dead ends: 1495 [2021-11-13 18:12:04,800 INFO L226 Difference]: Without dead ends: 837 [2021-11-13 18:12:04,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:12:04,805 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 227 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 976.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.22ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1150.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:04,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1564 Invalid, 471 Unknown, 0 Unchecked, 21.22ms Time], IncrementalHoareTripleChecker [142 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 1150.62ms Time] [2021-11-13 18:12:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-11-13 18:12:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 820. [2021-11-13 18:12:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 652 states have (on average 1.4248466257668713) internal successors, (929), 656 states have internal predecessors, (929), 124 states have call successors, (124), 44 states have call predecessors, (124), 43 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-13 18:12:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1176 transitions. [2021-11-13 18:12:04,879 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1176 transitions. Word has length 72 [2021-11-13 18:12:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:04,880 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1176 transitions. [2021-11-13 18:12:04,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:12:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1176 transitions. [2021-11-13 18:12:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:12:04,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:04,889 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:04,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:12:04,890 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1325133881, now seen corresponding path program 1 times [2021-11-13 18:12:04,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:04,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091706678] [2021-11-13 18:12:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:04,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:12:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:12:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:12:05,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:05,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091706678] [2021-11-13 18:12:05,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091706678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:05,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:05,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:12:05,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385877846] [2021-11-13 18:12:05,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:05,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:12:05,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:12:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:12:05,360 INFO L87 Difference]: Start difference. First operand 820 states and 1176 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:12:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:06,339 INFO L93 Difference]: Finished difference Result 1634 states and 2352 transitions. [2021-11-13 18:12:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:12:06,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 103 [2021-11-13 18:12:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:06,355 INFO L225 Difference]: With dead ends: 1634 [2021-11-13 18:12:06,355 INFO L226 Difference]: Without dead ends: 831 [2021-11-13 18:12:06,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:12:06,364 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 503 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 714.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.12ms SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 848.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:06,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1122 Invalid, 343 Unknown, 0 Unchecked, 16.12ms Time], IncrementalHoareTripleChecker [136 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 848.10ms Time] [2021-11-13 18:12:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-13 18:12:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2021-11-13 18:12:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 652 states have (on average 1.4003067484662577) internal successors, (913), 656 states have internal predecessors, (913), 124 states have call successors, (124), 44 states have call predecessors, (124), 43 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-13 18:12:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1160 transitions. [2021-11-13 18:12:06,464 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1160 transitions. Word has length 103 [2021-11-13 18:12:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:06,466 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1160 transitions. [2021-11-13 18:12:06,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:12:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1160 transitions. [2021-11-13 18:12:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:12:06,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:06,476 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:06,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:12:06,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash 762669387, now seen corresponding path program 1 times [2021-11-13 18:12:06,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:06,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858289384] [2021-11-13 18:12:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:06,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:12:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:12:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:12:06,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858289384] [2021-11-13 18:12:06,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858289384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:06,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:06,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:12:06,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654401553] [2021-11-13 18:12:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:06,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:12:06,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:12:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:12:06,950 INFO L87 Difference]: Start difference. First operand 820 states and 1160 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:12:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:08,850 INFO L93 Difference]: Finished difference Result 2449 states and 3476 transitions. [2021-11-13 18:12:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:12:08,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 103 [2021-11-13 18:12:08,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:08,868 INFO L225 Difference]: With dead ends: 2449 [2021-11-13 18:12:08,869 INFO L226 Difference]: Without dead ends: 1646 [2021-11-13 18:12:08,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:12:08,873 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 699 mSDsluCounter, 2343 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1381.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.63ms SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1650.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:08,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 3287 Invalid, 787 Unknown, 0 Unchecked, 34.63ms Time], IncrementalHoareTripleChecker [247 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1650.73ms Time] [2021-11-13 18:12:08,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-11-13 18:12:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1107. [2021-11-13 18:12:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 883 states have (on average 1.4122310305775765) internal successors, (1247), 888 states have internal predecessors, (1247), 164 states have call successors, (164), 60 states have call predecessors, (164), 59 states have return successors, (163), 160 states have call predecessors, (163), 163 states have call successors, (163) [2021-11-13 18:12:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1574 transitions. [2021-11-13 18:12:08,965 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1574 transitions. Word has length 103 [2021-11-13 18:12:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:08,966 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1574 transitions. [2021-11-13 18:12:08,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:12:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1574 transitions. [2021-11-13 18:12:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:12:08,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:08,972 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:08,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:12:08,973 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash -258398967, now seen corresponding path program 1 times [2021-11-13 18:12:08,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:08,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334926039] [2021-11-13 18:12:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:08,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:12:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:12:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:12:09,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:09,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334926039] [2021-11-13 18:12:09,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334926039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:09,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:09,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:12:09,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018861723] [2021-11-13 18:12:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:09,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:12:09,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:12:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:12:09,320 INFO L87 Difference]: Start difference. First operand 1107 states and 1574 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:12:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:10,608 INFO L93 Difference]: Finished difference Result 2118 states and 3046 transitions. [2021-11-13 18:12:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:12:10,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 103 [2021-11-13 18:12:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:10,619 INFO L225 Difference]: With dead ends: 2118 [2021-11-13 18:12:10,620 INFO L226 Difference]: Without dead ends: 942 [2021-11-13 18:12:10,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:12:10,627 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 456 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 988.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.79ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1126.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:10,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 1428 Invalid, 362 Unknown, 0 Unchecked, 14.79ms Time], IncrementalHoareTripleChecker [129 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1126.96ms Time] [2021-11-13 18:12:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-13 18:12:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 929. [2021-11-13 18:12:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 739 states have (on average 1.419485791610284) internal successors, (1049), 743 states have internal predecessors, (1049), 141 states have call successors, (141), 49 states have call predecessors, (141), 48 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2021-11-13 18:12:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1330 transitions. [2021-11-13 18:12:10,693 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1330 transitions. Word has length 103 [2021-11-13 18:12:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:10,695 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1330 transitions. [2021-11-13 18:12:10,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:12:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1330 transitions. [2021-11-13 18:12:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 18:12:10,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:10,704 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:10,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:12:10,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash 611897207, now seen corresponding path program 1 times [2021-11-13 18:12:10,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:10,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067271537] [2021-11-13 18:12:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:10,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:12:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:12:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:12:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:12:11,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:11,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067271537] [2021-11-13 18:12:11,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067271537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:11,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:11,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:12:11,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324815673] [2021-11-13 18:12:11,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:11,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:12:11,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:12:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:12:11,360 INFO L87 Difference]: Start difference. First operand 929 states and 1330 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:12:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:13,215 INFO L93 Difference]: Finished difference Result 1981 states and 2945 transitions. [2021-11-13 18:12:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:12:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 105 [2021-11-13 18:12:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:13,232 INFO L225 Difference]: With dead ends: 1981 [2021-11-13 18:12:13,233 INFO L226 Difference]: Without dead ends: 1617 [2021-11-13 18:12:13,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:12:13,237 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1558 mSDsluCounter, 3514 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1306.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 4312 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.44ms SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1528.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:13,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1558 Valid, 4312 Invalid, 1000 Unknown, 0 Unchecked, 41.44ms Time], IncrementalHoareTripleChecker [426 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1528.10ms Time] [2021-11-13 18:12:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-11-13 18:12:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 939. [2021-11-13 18:12:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 749 states have (on average 1.4138851802403205) internal successors, (1059), 753 states have internal predecessors, (1059), 141 states have call successors, (141), 49 states have call predecessors, (141), 48 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2021-11-13 18:12:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1340 transitions. [2021-11-13 18:12:13,361 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1340 transitions. Word has length 105 [2021-11-13 18:12:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:13,361 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1340 transitions. [2021-11-13 18:12:13,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:12:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1340 transitions. [2021-11-13 18:12:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:12:13,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:13,367 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:13,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:12:13,367 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash -483555880, now seen corresponding path program 1 times [2021-11-13 18:12:13,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:13,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17485142] [2021-11-13 18:12:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:13,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:12:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:12:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-13 18:12:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:12:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 18:12:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-13 18:12:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:12:13,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:13,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17485142] [2021-11-13 18:12:13,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17485142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:13,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:13,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:12:13,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802510617] [2021-11-13 18:12:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:13,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:12:13,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:12:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:12:13,738 INFO L87 Difference]: Start difference. First operand 939 states and 1340 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:12:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:15,863 INFO L93 Difference]: Finished difference Result 1915 states and 2779 transitions. [2021-11-13 18:12:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:12:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 112 [2021-11-13 18:12:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:15,874 INFO L225 Difference]: With dead ends: 1915 [2021-11-13 18:12:15,874 INFO L226 Difference]: Without dead ends: 1078 [2021-11-13 18:12:15,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:12:15,879 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 424 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1516.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.72ms SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1800.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:15,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 2197 Invalid, 885 Unknown, 0 Unchecked, 22.72ms Time], IncrementalHoareTripleChecker [253 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1800.79ms Time] [2021-11-13 18:12:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-11-13 18:12:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1051. [2021-11-13 18:12:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 879 states have (on average 1.3856655290102389) internal successors, (1218), 882 states have internal predecessors, (1218), 120 states have call successors, (120), 52 states have call predecessors, (120), 51 states have return successors, (119), 118 states have call predecessors, (119), 119 states have call successors, (119) [2021-11-13 18:12:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1457 transitions. [2021-11-13 18:12:15,982 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1457 transitions. Word has length 112 [2021-11-13 18:12:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:15,983 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1457 transitions. [2021-11-13 18:12:15,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 6 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:12:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1457 transitions. [2021-11-13 18:12:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:12:15,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:15,990 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:15,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:12:15,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1850212731, now seen corresponding path program 1 times [2021-11-13 18:12:15,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:15,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421502773] [2021-11-13 18:12:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:15,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:12:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:12:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:12:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:12:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:12:16,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:16,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421502773] [2021-11-13 18:12:16,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421502773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:16,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751435402] [2021-11-13 18:12:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:16,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:16,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:16,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:12:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2626 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:12:17,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:12:17,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:12:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751435402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:17,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:12:17,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-13 18:12:17,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42646207] [2021-11-13 18:12:17,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:17,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:12:17,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:17,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:12:17,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:12:17,730 INFO L87 Difference]: Start difference. First operand 1051 states and 1457 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:12:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:18,260 INFO L93 Difference]: Finished difference Result 2157 states and 2991 transitions. [2021-11-13 18:12:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:12:18,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 111 [2021-11-13 18:12:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:18,270 INFO L225 Difference]: With dead ends: 2157 [2021-11-13 18:12:18,271 INFO L226 Difference]: Without dead ends: 1120 [2021-11-13 18:12:18,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:12:18,275 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 96 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 347.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 379.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:18,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1711 Invalid, 16 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 379.82ms Time] [2021-11-13 18:12:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-11-13 18:12:18,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1109. [2021-11-13 18:12:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 930 states have (on average 1.389247311827957) internal successors, (1292), 934 states have internal predecessors, (1292), 124 states have call successors, (124), 55 states have call predecessors, (124), 54 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-13 18:12:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1539 transitions. [2021-11-13 18:12:18,372 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1539 transitions. Word has length 111 [2021-11-13 18:12:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:18,373 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1539 transitions. [2021-11-13 18:12:18,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:12:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1539 transitions. [2021-11-13 18:12:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 18:12:18,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:18,378 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:18,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:18,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:18,601 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash -14744375, now seen corresponding path program 1 times [2021-11-13 18:12:18,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:18,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181481751] [2021-11-13 18:12:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:18,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:18,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:18,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:18,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:18,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:18,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:12:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:19,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:12:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:19,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:12:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:12:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:12:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:19,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:12:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:19,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:12:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 18:12:19,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:19,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181481751] [2021-11-13 18:12:19,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181481751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:19,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695113884] [2021-11-13 18:12:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:19,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:19,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:19,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:19,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:12:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:20,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:12:20,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:12:20,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:12:20,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695113884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:20,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:12:20,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-13 18:12:20,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944147389] [2021-11-13 18:12:20,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:20,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:12:20,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:12:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:12:20,755 INFO L87 Difference]: Start difference. First operand 1109 states and 1539 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:12:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:20,890 INFO L93 Difference]: Finished difference Result 2211 states and 3069 transitions. [2021-11-13 18:12:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:12:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 122 [2021-11-13 18:12:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:20,900 INFO L225 Difference]: With dead ends: 2211 [2021-11-13 18:12:20,901 INFO L226 Difference]: Without dead ends: 1110 [2021-11-13 18:12:20,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:12:20,906 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 2 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:20,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1524 Invalid, 9 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 13.06ms Time] [2021-11-13 18:12:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-13 18:12:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2021-11-13 18:12:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 931 states have (on average 1.3888292158968851) internal successors, (1293), 935 states have internal predecessors, (1293), 124 states have call successors, (124), 55 states have call predecessors, (124), 54 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-13 18:12:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1540 transitions. [2021-11-13 18:12:21,013 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1540 transitions. Word has length 122 [2021-11-13 18:12:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:21,013 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1540 transitions. [2021-11-13 18:12:21,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:12:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1540 transitions. [2021-11-13 18:12:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 18:12:21,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:21,018 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:21,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:21,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:21,234 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1166660575, now seen corresponding path program 1 times [2021-11-13 18:12:21,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:21,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759561586] [2021-11-13 18:12:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:21,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:12:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:12:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:12:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:12:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:12:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:12:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:12:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 18:12:21,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:21,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759561586] [2021-11-13 18:12:21,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759561586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:21,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210943756] [2021-11-13 18:12:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:21,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:21,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:21,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:21,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:12:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 2753 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:12:23,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:12:23,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 18:12:24,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210943756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:24,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:12:24,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2021-11-13 18:12:24,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82951291] [2021-11-13 18:12:24,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:12:24,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:12:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:12:24,127 INFO L87 Difference]: Start difference. First operand 1110 states and 1540 transitions. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (28), 4 states have call predecessors, (28), 5 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:12:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:25,556 INFO L93 Difference]: Finished difference Result 2223 states and 3089 transitions. [2021-11-13 18:12:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:12:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (28), 4 states have call predecessors, (28), 5 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 124 [2021-11-13 18:12:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:25,567 INFO L225 Difference]: With dead ends: 2223 [2021-11-13 18:12:25,567 INFO L226 Difference]: Without dead ends: 1119 [2021-11-13 18:12:25,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:12:25,571 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 88 mSDsluCounter, 2959 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 931.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3465 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.82ms SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1107.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:25,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 3465 Invalid, 561 Unknown, 0 Unchecked, 15.82ms Time], IncrementalHoareTripleChecker [135 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 1107.38ms Time] [2021-11-13 18:12:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-13 18:12:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1113. [2021-11-13 18:12:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 934 states have (on average 1.3875802997858673) internal successors, (1296), 938 states have internal predecessors, (1296), 124 states have call successors, (124), 55 states have call predecessors, (124), 54 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-13 18:12:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1543 transitions. [2021-11-13 18:12:25,693 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1543 transitions. Word has length 124 [2021-11-13 18:12:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:25,694 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1543 transitions. [2021-11-13 18:12:25,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (28), 4 states have call predecessors, (28), 5 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:12:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1543 transitions. [2021-11-13 18:12:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 18:12:25,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:25,699 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:25,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:25,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:25,917 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:25,917 INFO L85 PathProgramCache]: Analyzing trace with hash 53241033, now seen corresponding path program 2 times [2021-11-13 18:12:25,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:25,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473768414] [2021-11-13 18:12:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:25,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:12:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:12:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:12:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:12:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:12:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-13 18:12:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:12:26,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:26,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473768414] [2021-11-13 18:12:26,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473768414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:26,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:26,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:12:26,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79598927] [2021-11-13 18:12:26,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:26,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:12:26,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:12:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:12:26,744 INFO L87 Difference]: Start difference. First operand 1113 states and 1543 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 11 states have internal predecessors, (78), 3 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:12:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:30,182 INFO L93 Difference]: Finished difference Result 2829 states and 4097 transitions. [2021-11-13 18:12:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:12:30,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 11 states have internal predecessors, (78), 3 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 130 [2021-11-13 18:12:30,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:30,206 INFO L225 Difference]: With dead ends: 2829 [2021-11-13 18:12:30,206 INFO L226 Difference]: Without dead ends: 2360 [2021-11-13 18:12:30,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:12:30,211 INFO L933 BasicCegarLoop]: 1337 mSDtfsCounter, 2833 mSDsluCounter, 6728 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2396.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2833 SdHoareTripleChecker+Valid, 8065 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.26ms SdHoareTripleChecker+Time, 1193 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2844.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:30,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2833 Valid, 8065 Invalid, 2288 Unknown, 0 Unchecked, 54.26ms Time], IncrementalHoareTripleChecker [1193 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 2844.01ms Time] [2021-11-13 18:12:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-11-13 18:12:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1116. [2021-11-13 18:12:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 937 states have (on average 1.3863393810032016) internal successors, (1299), 941 states have internal predecessors, (1299), 124 states have call successors, (124), 55 states have call predecessors, (124), 54 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-13 18:12:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1546 transitions. [2021-11-13 18:12:30,354 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1546 transitions. Word has length 130 [2021-11-13 18:12:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:30,355 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1546 transitions. [2021-11-13 18:12:30,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 11 states have internal predecessors, (78), 3 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:12:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1546 transitions. [2021-11-13 18:12:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 18:12:30,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:30,387 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:30,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:12:30,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1433788225, now seen corresponding path program 1 times [2021-11-13 18:12:30,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:30,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727893511] [2021-11-13 18:12:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:30,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:12:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:12:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:12:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:12:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:12:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:12:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:12:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:12:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:12:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-13 18:12:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:12:30,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:30,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727893511] [2021-11-13 18:12:30,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727893511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:30,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140980468] [2021-11-13 18:12:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:30,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:30,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:30,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:12:30,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:12:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:31,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:12:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:12:31,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:12:31,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140980468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:31,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:12:31,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-13 18:12:31,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616712797] [2021-11-13 18:12:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:31,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:12:31,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:31,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:12:31,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:12:31,993 INFO L87 Difference]: Start difference. First operand 1116 states and 1546 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:12:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:32,655 INFO L93 Difference]: Finished difference Result 2628 states and 3613 transitions. [2021-11-13 18:12:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:12:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2021-11-13 18:12:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:32,671 INFO L225 Difference]: With dead ends: 2628 [2021-11-13 18:12:32,672 INFO L226 Difference]: Without dead ends: 1676 [2021-11-13 18:12:32,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:12:32,676 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 598 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 387.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.31ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 447.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:32,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 2753 Invalid, 166 Unknown, 0 Unchecked, 10.31ms Time], IncrementalHoareTripleChecker [65 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 447.39ms Time] [2021-11-13 18:12:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-11-13 18:12:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1122. [2021-11-13 18:12:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 941 states have (on average 1.3868225292242295) internal successors, (1305), 945 states have internal predecessors, (1305), 126 states have call successors, (126), 55 states have call predecessors, (126), 54 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-11-13 18:12:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1556 transitions. [2021-11-13 18:12:32,848 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1556 transitions. Word has length 138 [2021-11-13 18:12:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:32,849 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1556 transitions. [2021-11-13 18:12:32,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:12:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1556 transitions. [2021-11-13 18:12:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 18:12:32,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:32,855 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:32,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:33,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:12:33,082 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash 867034365, now seen corresponding path program 1 times [2021-11-13 18:12:33,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:33,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994580179] [2021-11-13 18:12:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:33,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:12:34,018 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:12:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:12:35,229 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:12:35,230 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:12:35,231 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:12:35,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:12:35,238 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:35,243 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:12:35,353 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-13 18:12:35,358 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-13 18:12:35,471 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:12:35,482 INFO L158 Benchmark]: Toolchain (without parser) took 42485.84ms. Allocated memory was 90.2MB in the beginning and 400.6MB in the end (delta: 310.4MB). Free memory was 46.8MB in the beginning and 295.3MB in the end (delta: -248.5MB). Peak memory consumption was 253.1MB. Max. memory is 16.1GB. [2021-11-13 18:12:35,482 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory is still 68.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:12:35,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1878.42ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 46.6MB in the beginning and 53.0MB in the end (delta: -6.4MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2021-11-13 18:12:35,483 INFO L158 Benchmark]: Boogie Procedure Inliner took 232.89ms. Allocated memory is still 123.7MB. Free memory was 53.0MB in the beginning and 40.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 18:12:35,484 INFO L158 Benchmark]: Boogie Preprocessor took 215.94ms. Allocated memory is still 123.7MB. Free memory was 40.4MB in the beginning and 75.6MB in the end (delta: -35.2MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2021-11-13 18:12:35,484 INFO L158 Benchmark]: RCFGBuilder took 4203.22ms. Allocated memory was 123.7MB in the beginning and 230.7MB in the end (delta: 107.0MB). Free memory was 75.6MB in the beginning and 126.8MB in the end (delta: -51.2MB). Peak memory consumption was 90.8MB. Max. memory is 16.1GB. [2021-11-13 18:12:35,486 INFO L158 Benchmark]: TraceAbstraction took 35945.21ms. Allocated memory was 230.7MB in the beginning and 400.6MB in the end (delta: 169.9MB). Free memory was 126.8MB in the beginning and 295.3MB in the end (delta: -168.5MB). Peak memory consumption was 191.2MB. Max. memory is 16.1GB. [2021-11-13 18:12:35,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory is still 68.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1878.42ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 46.6MB in the beginning and 53.0MB in the end (delta: -6.4MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 232.89ms. Allocated memory is still 123.7MB. Free memory was 53.0MB in the beginning and 40.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 215.94ms. Allocated memory is still 123.7MB. Free memory was 40.4MB in the beginning and 75.6MB in the end (delta: -35.2MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. * RCFGBuilder took 4203.22ms. Allocated memory was 123.7MB in the beginning and 230.7MB in the end (delta: 107.0MB). Free memory was 75.6MB in the beginning and 126.8MB in the end (delta: -51.2MB). Peak memory consumption was 90.8MB. Max. memory is 16.1GB. * TraceAbstraction took 35945.21ms. Allocated memory was 230.7MB in the beginning and 400.6MB in the end (delta: 169.9MB). Free memory was 126.8MB in the beginning and 295.3MB in the end (delta: -168.5MB). Peak memory consumption was 191.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:12:35,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c8a07fe1a25f7f87a80e2b435a79d4715298ae698f37888069e22026322224ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:12:38,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:12:38,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:12:38,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:12:38,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:12:38,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:12:38,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:12:38,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:12:38,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:12:38,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:12:38,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:12:38,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:12:38,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:12:38,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:12:38,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:12:38,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:12:38,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:12:38,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:12:38,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:12:38,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:12:38,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:12:38,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:12:38,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:12:38,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:12:38,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:12:38,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:12:38,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:12:38,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:12:38,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:12:38,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:12:38,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:12:38,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:12:38,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:12:38,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:12:38,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:12:38,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:12:38,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:12:38,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:12:38,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:12:38,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:12:38,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:12:38,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:12:39,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:12:39,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:12:39,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:12:39,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:12:39,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:12:39,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:12:39,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:12:39,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:12:39,010 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:12:39,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:12:39,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:12:39,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:12:39,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:12:39,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:12:39,014 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:12:39,014 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:12:39,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:12:39,015 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:12:39,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:12:39,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:12:39,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:12:39,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:12:39,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:12:39,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:12:39,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:12:39,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:12:39,018 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:12:39,019 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:12:39,019 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:12:39,019 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:12:39,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:12:39,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:12:39,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:12:39,021 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8a07fe1a25f7f87a80e2b435a79d4715298ae698f37888069e22026322224ef [2021-11-13 18:12:39,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:12:39,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:12:39,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:12:39,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:12:39,621 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:12:39,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2021-11-13 18:12:39,725 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/53d587914/6f5bcf3c3dda491d878ce5f274d89dd0/FLAGa978af167 [2021-11-13 18:12:40,935 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:12:40,936 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2021-11-13 18:12:41,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/53d587914/6f5bcf3c3dda491d878ce5f274d89dd0/FLAGa978af167 [2021-11-13 18:12:41,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/data/53d587914/6f5bcf3c3dda491d878ce5f274d89dd0 [2021-11-13 18:12:41,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:12:41,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:12:41,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:12:41,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:12:41,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:12:41,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:12:41" (1/1) ... [2021-11-13 18:12:41,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47640ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:41, skipping insertion in model container [2021-11-13 18:12:41,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:12:41" (1/1) ... [2021-11-13 18:12:41,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:12:41,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:12:42,266 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[95017,95030] [2021-11-13 18:12:42,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:12:42,970 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:12:43,171 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[95017,95030] [2021-11-13 18:12:43,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:12:43,477 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:12:43,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43 WrapperNode [2021-11-13 18:12:43,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:12:43,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:12:43,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:12:43,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:12:43,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:12:43,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:12:43,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:12:43,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:12:43,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:12:43,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:12:43,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:12:43,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:12:43,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (1/1) ... [2021-11-13 18:12:43,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:12:43,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:12:43,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:12:44,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:12:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:12:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:12:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2021-11-13 18:12:44,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2021-11-13 18:12:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:12:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:12:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-11-13 18:12:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-11-13 18:12:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-13 18:12:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-13 18:12:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-13 18:12:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-13 18:12:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:12:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:12:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2021-11-13 18:12:44,053 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2021-11-13 18:12:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:12:44,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:12:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-13 18:12:44,054 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-13 18:12:44,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:12:44,054 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:12:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2021-11-13 18:12:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2021-11-13 18:12:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:12:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:12:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:12:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:12:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:12:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2021-11-13 18:12:44,057 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2021-11-13 18:12:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:12:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-13 18:12:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-13 18:12:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2021-11-13 18:12:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2021-11-13 18:12:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:12:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:12:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:12:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:12:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:12:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:12:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-13 18:12:44,061 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-13 18:12:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2021-11-13 18:12:44,062 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2021-11-13 18:12:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2021-11-13 18:12:44,063 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2021-11-13 18:12:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2021-11-13 18:12:44,063 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2021-11-13 18:12:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:12:44,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:12:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2021-11-13 18:12:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2021-11-13 18:12:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:12:44,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:12:44,805 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:12:50,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:12:50,595 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:12:50,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:12:50 BoogieIcfgContainer [2021-11-13 18:12:50,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:12:50,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:12:50,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:12:50,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:12:50,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:12:41" (1/3) ... [2021-11-13 18:12:50,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@978e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:12:50, skipping insertion in model container [2021-11-13 18:12:50,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:12:43" (2/3) ... [2021-11-13 18:12:50,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@978e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:12:50, skipping insertion in model container [2021-11-13 18:12:50,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:12:50" (3/3) ... [2021-11-13 18:12:50,609 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2021-11-13 18:12:50,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:12:50,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:12:50,681 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:12:50,689 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:12:50,690 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:12:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 376 states, 283 states have (on average 1.4240282685512367) internal successors, (403), 291 states have internal predecessors, (403), 71 states have call successors, (71), 21 states have call predecessors, (71), 20 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-13 18:12:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:12:50,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:50,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:50,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash 505290590, now seen corresponding path program 1 times [2021-11-13 18:12:50,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:50,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142887096] [2021-11-13 18:12:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:50,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:50,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:50,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:50,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:12:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:12:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:12:52,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:12:52,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:52,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142887096] [2021-11-13 18:12:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142887096] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:12:52,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:12:52,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 18:12:52,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206933975] [2021-11-13 18:12:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:52,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:12:52,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:12:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:12:52,755 INFO L87 Difference]: Start difference. First operand has 376 states, 283 states have (on average 1.4240282685512367) internal successors, (403), 291 states have internal predecessors, (403), 71 states have call successors, (71), 21 states have call predecessors, (71), 20 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:12:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:52,961 INFO L93 Difference]: Finished difference Result 750 states and 1089 transitions. [2021-11-13 18:12:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:12:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2021-11-13 18:12:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:52,987 INFO L225 Difference]: With dead ends: 750 [2021-11-13 18:12:52,987 INFO L226 Difference]: Without dead ends: 365 [2021-11-13 18:12:52,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:12:53,003 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 2 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.99ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:53,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1599 Invalid, 9 Unknown, 0 Unchecked, 19.99ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 48.50ms Time] [2021-11-13 18:12:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-13 18:12:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-11-13 18:12:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 279 states have (on average 1.4014336917562724) internal successors, (391), 280 states have internal predecessors, (391), 66 states have call successors, (66), 20 states have call predecessors, (66), 19 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-13 18:12:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 522 transitions. [2021-11-13 18:12:53,135 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 522 transitions. Word has length 48 [2021-11-13 18:12:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:53,138 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 522 transitions. [2021-11-13 18:12:53,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:12:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 522 transitions. [2021-11-13 18:12:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:12:53,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:53,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:53,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:53,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:53,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash 920442038, now seen corresponding path program 1 times [2021-11-13 18:12:53,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:53,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979667089] [2021-11-13 18:12:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:53,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:53,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:53,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:53,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:12:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:12:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:12:54,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:12:55,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:55,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979667089] [2021-11-13 18:12:55,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979667089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:12:55,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:12:55,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-13 18:12:55,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483427637] [2021-11-13 18:12:55,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:12:55,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:12:55,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:12:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:12:55,371 INFO L87 Difference]: Start difference. First operand 365 states and 522 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:12:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:55,778 INFO L93 Difference]: Finished difference Result 727 states and 1042 transitions. [2021-11-13 18:12:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:12:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-11-13 18:12:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:55,789 INFO L225 Difference]: With dead ends: 727 [2021-11-13 18:12:55,790 INFO L226 Difference]: Without dead ends: 368 [2021-11-13 18:12:55,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:12:55,809 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 9 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2588 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:55,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 2588 Invalid, 29 Unknown, 0 Unchecked, 31.44ms Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 150.72ms Time] [2021-11-13 18:12:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-13 18:12:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-11-13 18:12:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 282 states have (on average 1.3971631205673758) internal successors, (394), 283 states have internal predecessors, (394), 66 states have call successors, (66), 20 states have call predecessors, (66), 19 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-13 18:12:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 525 transitions. [2021-11-13 18:12:55,886 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 525 transitions. Word has length 50 [2021-11-13 18:12:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:55,887 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 525 transitions. [2021-11-13 18:12:55,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:12:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 525 transitions. [2021-11-13 18:12:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:12:55,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:55,893 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:55,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:56,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:56,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:56,119 INFO L85 PathProgramCache]: Analyzing trace with hash -865894562, now seen corresponding path program 2 times [2021-11-13 18:12:56,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:56,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599764680] [2021-11-13 18:12:56,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:12:56,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:56,132 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:56,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:12:57,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:12:57,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:12:57,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:12:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:57,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:58,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:58,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599764680] [2021-11-13 18:12:58,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599764680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:58,036 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:58,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:12:58,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325031511] [2021-11-13 18:12:58,037 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:58,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:12:58,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:12:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:12:58,051 INFO L87 Difference]: Start difference. First operand 368 states and 525 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:12:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:58,137 INFO L93 Difference]: Finished difference Result 705 states and 1015 transitions. [2021-11-13 18:12:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:12:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 56 [2021-11-13 18:12:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:58,156 INFO L225 Difference]: With dead ends: 705 [2021-11-13 18:12:58,157 INFO L226 Difference]: Without dead ends: 696 [2021-11-13 18:12:58,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:12:58,168 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 464 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:58,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1091 Invalid, 5 Unknown, 0 Unchecked, 9.92ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 19.46ms Time] [2021-11-13 18:12:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-13 18:12:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 679. [2021-11-13 18:12:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 530 states have (on average 1.4169811320754717) internal successors, (751), 533 states have internal predecessors, (751), 113 states have call successors, (113), 36 states have call predecessors, (113), 35 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-13 18:12:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 976 transitions. [2021-11-13 18:12:58,284 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 976 transitions. Word has length 56 [2021-11-13 18:12:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:58,286 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 976 transitions. [2021-11-13 18:12:58,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:12:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 976 transitions. [2021-11-13 18:12:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 18:12:58,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:58,296 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:58,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:58,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:58,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1553042684, now seen corresponding path program 1 times [2021-11-13 18:12:58,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:58,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626165869] [2021-11-13 18:12:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:58,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:58,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:58,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:58,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:13:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:00,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:13:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:13:00,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:13:00,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:00,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626165869] [2021-11-13 18:13:00,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626165869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:00,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:00,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:13:00,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484754624] [2021-11-13 18:13:00,673 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:00,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:13:00,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:13:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:13:00,678 INFO L87 Difference]: Start difference. First operand 679 states and 976 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:13:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:01,298 INFO L93 Difference]: Finished difference Result 1488 states and 2137 transitions. [2021-11-13 18:13:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:13:01,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 80 [2021-11-13 18:13:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:01,308 INFO L225 Difference]: With dead ends: 1488 [2021-11-13 18:13:01,308 INFO L226 Difference]: Without dead ends: 830 [2021-11-13 18:13:01,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:13:01,312 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 127 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 463.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.07ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 530.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:01,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 945 Invalid, 92 Unknown, 0 Unchecked, 6.07ms Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 530.05ms Time] [2021-11-13 18:13:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-13 18:13:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 824. [2021-11-13 18:13:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 656 states have (on average 1.4222560975609757) internal successors, (933), 660 states have internal predecessors, (933), 124 states have call successors, (124), 44 states have call predecessors, (124), 43 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-13 18:13:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1180 transitions. [2021-11-13 18:13:01,373 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1180 transitions. Word has length 80 [2021-11-13 18:13:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:01,374 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1180 transitions. [2021-11-13 18:13:01,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:13:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1180 transitions. [2021-11-13 18:13:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:13:01,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:01,398 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:01,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:01,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:01,615 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash -130895929, now seen corresponding path program 1 times [2021-11-13 18:13:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:01,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200108519] [2021-11-13 18:13:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:01,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:01,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:01,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:13:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:13:03,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 18:13:03,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-13 18:13:03,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:03,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200108519] [2021-11-13 18:13:03,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200108519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:03,770 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:03,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:13:03,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558733644] [2021-11-13 18:13:03,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:03,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:13:03,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:13:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:13:03,773 INFO L87 Difference]: Start difference. First operand 824 states and 1180 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:13:06,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:06,348 INFO L93 Difference]: Finished difference Result 2423 states and 3471 transitions. [2021-11-13 18:13:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:13:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-13 18:13:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:06,364 INFO L225 Difference]: With dead ends: 2423 [2021-11-13 18:13:06,364 INFO L226 Difference]: Without dead ends: 1614 [2021-11-13 18:13:06,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:13:06,369 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 491 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2327.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.98ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2386.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:06,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 2508 Invalid, 19 Unknown, 0 Unchecked, 10.98ms Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 2386.94ms Time] [2021-11-13 18:13:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-11-13 18:13:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1493. [2021-11-13 18:13:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1188 states have (on average 1.4318181818181819) internal successors, (1701), 1198 states have internal predecessors, (1701), 226 states have call successors, (226), 79 states have call predecessors, (226), 78 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2021-11-13 18:13:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2152 transitions. [2021-11-13 18:13:06,480 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2152 transitions. Word has length 111 [2021-11-13 18:13:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:06,481 INFO L470 AbstractCegarLoop]: Abstraction has 1493 states and 2152 transitions. [2021-11-13 18:13:06,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:13:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2152 transitions. [2021-11-13 18:13:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 18:13:06,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:06,487 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:06,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:06,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:06,709 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:06,710 INFO L85 PathProgramCache]: Analyzing trace with hash 47512075, now seen corresponding path program 1 times [2021-11-13 18:13:06,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:06,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118968782] [2021-11-13 18:13:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:06,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:06,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:06,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:06,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:13:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:08,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:13:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:08,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:09,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:09,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118968782] [2021-11-13 18:13:09,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118968782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:09,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:09,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:13:09,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275772363] [2021-11-13 18:13:09,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:09,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:13:09,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:09,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:13:09,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:13:09,155 INFO L87 Difference]: Start difference. First operand 1493 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-13 18:13:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:09,292 INFO L93 Difference]: Finished difference Result 2965 states and 4278 transitions. [2021-11-13 18:13:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:13:09,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 122 [2021-11-13 18:13:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:09,311 INFO L225 Difference]: With dead ends: 2965 [2021-11-13 18:13:09,311 INFO L226 Difference]: Without dead ends: 1493 [2021-11-13 18:13:09,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:13:09,320 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 451 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.07ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:09,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 505 Invalid, 15 Unknown, 0 Unchecked, 4.07ms Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 25.04ms Time] [2021-11-13 18:13:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-11-13 18:13:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1493. [2021-11-13 18:13:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1188 states have (on average 1.4048821548821548) internal successors, (1669), 1198 states have internal predecessors, (1669), 226 states have call successors, (226), 79 states have call predecessors, (226), 78 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2021-11-13 18:13:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2120 transitions. [2021-11-13 18:13:09,436 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2120 transitions. Word has length 122 [2021-11-13 18:13:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:09,437 INFO L470 AbstractCegarLoop]: Abstraction has 1493 states and 2120 transitions. [2021-11-13 18:13:09,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-13 18:13:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2120 transitions. [2021-11-13 18:13:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 18:13:09,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:09,443 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:09,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:09,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:09,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2135315343, now seen corresponding path program 1 times [2021-11-13 18:13:09,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:09,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115366279] [2021-11-13 18:13:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:09,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:09,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:09,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:09,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:13:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:11,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:13:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:11,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:12,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:12,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115366279] [2021-11-13 18:13:12,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115366279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:12,214 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:12,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-13 18:13:12,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720080166] [2021-11-13 18:13:12,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:12,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:13:12,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:12,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:13:12,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:13:12,221 INFO L87 Difference]: Start difference. First operand 1493 states and 2120 transitions. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:13:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:13,976 INFO L93 Difference]: Finished difference Result 4424 states and 6646 transitions. [2021-11-13 18:13:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:13:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 122 [2021-11-13 18:13:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:14,012 INFO L225 Difference]: With dead ends: 4424 [2021-11-13 18:13:14,013 INFO L226 Difference]: Without dead ends: 3683 [2021-11-13 18:13:14,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:13:14,018 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 2534 mSDsluCounter, 6497 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 970.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2592 SdHoareTripleChecker+Valid, 7381 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.54ms SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1141.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:14,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2592 Valid, 7381 Invalid, 522 Unknown, 0 Unchecked, 37.54ms Time], IncrementalHoareTripleChecker [407 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 1141.07ms Time] [2021-11-13 18:13:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2021-11-13 18:13:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 1513. [2021-11-13 18:13:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1208 states have (on average 1.3981788079470199) internal successors, (1689), 1218 states have internal predecessors, (1689), 226 states have call successors, (226), 79 states have call predecessors, (226), 78 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2021-11-13 18:13:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2140 transitions. [2021-11-13 18:13:14,285 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2140 transitions. Word has length 122 [2021-11-13 18:13:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:14,286 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 2140 transitions. [2021-11-13 18:13:14,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:13:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2140 transitions. [2021-11-13 18:13:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 18:13:14,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:14,292 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:14,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:14,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:14,505 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -81936154, now seen corresponding path program 1 times [2021-11-13 18:13:14,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:14,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046482645] [2021-11-13 18:13:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:14,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:14,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:14,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:14,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:13:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:13:15,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:13:16,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-13 18:13:16,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:16,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046482645] [2021-11-13 18:13:16,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046482645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:16,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:16,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:13:16,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114495760] [2021-11-13 18:13:16,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:16,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:13:16,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:13:16,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:13:16,682 INFO L87 Difference]: Start difference. First operand 1513 states and 2140 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 18:13:18,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:20,158 INFO L93 Difference]: Finished difference Result 3951 states and 5722 transitions. [2021-11-13 18:13:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:13:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 129 [2021-11-13 18:13:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:20,179 INFO L225 Difference]: With dead ends: 3951 [2021-11-13 18:13:20,179 INFO L226 Difference]: Without dead ends: 2459 [2021-11-13 18:13:20,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:13:20,185 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 742 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 151 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2961.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.28ms SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3139.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:20,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 912 Invalid, 409 Unknown, 0 Unchecked, 11.28ms Time], IncrementalHoareTripleChecker [151 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 3139.45ms Time] [2021-11-13 18:13:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-11-13 18:13:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2367. [2021-11-13 18:13:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 1992 states have (on average 1.4402610441767068) internal successors, (2869), 2002 states have internal predecessors, (2869), 254 states have call successors, (254), 121 states have call predecessors, (254), 120 states have return successors, (253), 247 states have call predecessors, (253), 253 states have call successors, (253) [2021-11-13 18:13:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3376 transitions. [2021-11-13 18:13:20,492 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3376 transitions. Word has length 129 [2021-11-13 18:13:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:20,492 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 3376 transitions. [2021-11-13 18:13:20,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 18:13:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3376 transitions. [2021-11-13 18:13:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:13:20,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:20,500 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:20,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:20,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:20,722 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1347562269, now seen corresponding path program 1 times [2021-11-13 18:13:20,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:20,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672246538] [2021-11-13 18:13:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:20,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:20,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:20,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:13:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:13:22,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:22,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:24,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:24,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672246538] [2021-11-13 18:13:24,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672246538] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:24,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:24,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 12] imperfect sequences [] total 22 [2021-11-13 18:13:24,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659136261] [2021-11-13 18:13:24,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:24,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:13:24,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:13:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:13:24,105 INFO L87 Difference]: Start difference. First operand 2367 states and 3376 transitions. Second operand has 22 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:13:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:28,238 INFO L93 Difference]: Finished difference Result 7194 states and 10696 transitions. [2021-11-13 18:13:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:13:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 128 [2021-11-13 18:13:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:28,288 INFO L225 Difference]: With dead ends: 7194 [2021-11-13 18:13:28,288 INFO L226 Difference]: Without dead ends: 4848 [2021-11-13 18:13:28,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:13:28,299 INFO L933 BasicCegarLoop]: 1206 mSDtfsCounter, 3778 mSDsluCounter, 14974 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2167.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3836 SdHoareTripleChecker+Valid, 16180 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 70.59ms SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2495.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:28,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3836 Valid, 16180 Invalid, 1045 Unknown, 0 Unchecked, 70.59ms Time], IncrementalHoareTripleChecker [644 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 2495.85ms Time] [2021-11-13 18:13:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2021-11-13 18:13:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 2361. [2021-11-13 18:13:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 1986 states have (on average 1.4395770392749245) internal successors, (2859), 1998 states have internal predecessors, (2859), 254 states have call successors, (254), 121 states have call predecessors, (254), 120 states have return successors, (253), 245 states have call predecessors, (253), 253 states have call successors, (253) [2021-11-13 18:13:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3366 transitions. [2021-11-13 18:13:28,741 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3366 transitions. Word has length 128 [2021-11-13 18:13:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:28,742 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 3366 transitions. [2021-11-13 18:13:28,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:13:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3366 transitions. [2021-11-13 18:13:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 18:13:28,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:28,751 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:28,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:28,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:28,964 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:28,965 INFO L85 PathProgramCache]: Analyzing trace with hash 870197329, now seen corresponding path program 1 times [2021-11-13 18:13:28,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:28,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849606707] [2021-11-13 18:13:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:28,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:28,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:28,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:29,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:13:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:30,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:13:30,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:30,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:31,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:31,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849606707] [2021-11-13 18:13:31,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849606707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:31,244 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:31,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:13:31,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207666704] [2021-11-13 18:13:31,245 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:31,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:13:31,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:31,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:13:31,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:13:31,246 INFO L87 Difference]: Start difference. First operand 2361 states and 3366 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:13:33,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:35,433 INFO L93 Difference]: Finished difference Result 7066 states and 9871 transitions. [2021-11-13 18:13:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:13:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 136 [2021-11-13 18:13:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:35,476 INFO L225 Difference]: With dead ends: 7066 [2021-11-13 18:13:35,476 INFO L226 Difference]: Without dead ends: 4726 [2021-11-13 18:13:35,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:13:35,485 INFO L933 BasicCegarLoop]: 1120 mSDtfsCounter, 1567 mSDsluCounter, 3920 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 244 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3135.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 5040 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.37ms SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3342.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:35,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 5040 Invalid, 568 Unknown, 0 Unchecked, 22.37ms Time], IncrementalHoareTripleChecker [244 Valid, 323 Invalid, 1 Unknown, 0 Unchecked, 3342.42ms Time] [2021-11-13 18:13:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-11-13 18:13:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 2377. [2021-11-13 18:13:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2002 states have (on average 1.436063936063936) internal successors, (2875), 2010 states have internal predecessors, (2875), 254 states have call successors, (254), 121 states have call predecessors, (254), 120 states have return successors, (253), 245 states have call predecessors, (253), 253 states have call successors, (253) [2021-11-13 18:13:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3382 transitions. [2021-11-13 18:13:35,864 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3382 transitions. Word has length 136 [2021-11-13 18:13:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:35,865 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 3382 transitions. [2021-11-13 18:13:35,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 18:13:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3382 transitions. [2021-11-13 18:13:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 18:13:35,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:35,871 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:35,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:36,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:36,085 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:36,086 INFO L85 PathProgramCache]: Analyzing trace with hash -150871025, now seen corresponding path program 1 times [2021-11-13 18:13:36,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:36,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963055963] [2021-11-13 18:13:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:36,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:36,091 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:36,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:13:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:13:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 18:13:37,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 18:13:38,181 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:38,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963055963] [2021-11-13 18:13:38,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963055963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:38,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:38,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:13:38,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154387598] [2021-11-13 18:13:38,183 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:13:38,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:13:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:13:38,185 INFO L87 Difference]: Start difference. First operand 2377 states and 3382 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:13:40,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:40,854 INFO L93 Difference]: Finished difference Result 3703 states and 5299 transitions. [2021-11-13 18:13:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:13:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 136 [2021-11-13 18:13:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:40,867 INFO L225 Difference]: With dead ends: 3703 [2021-11-13 18:13:40,867 INFO L226 Difference]: Without dead ends: 1218 [2021-11-13 18:13:40,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:13:40,875 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 743 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 114 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2396.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2494.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:40,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 820 Invalid, 151 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [114 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2494.54ms Time] [2021-11-13 18:13:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-11-13 18:13:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1142. [2021-11-13 18:13:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 966 states have (on average 1.4327122153209109) internal successors, (1384), 967 states have internal predecessors, (1384), 120 states have call successors, (120), 56 states have call predecessors, (120), 55 states have return successors, (119), 118 states have call predecessors, (119), 119 states have call successors, (119) [2021-11-13 18:13:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1623 transitions. [2021-11-13 18:13:41,075 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1623 transitions. Word has length 136 [2021-11-13 18:13:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:41,076 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 1623 transitions. [2021-11-13 18:13:41,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:13:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1623 transitions. [2021-11-13 18:13:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 18:13:41,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:41,081 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:41,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:41,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:13:41,301 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:41,302 INFO L85 PathProgramCache]: Analyzing trace with hash 867034365, now seen corresponding path program 1 times [2021-11-13 18:13:41,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:13:41,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772550024] [2021-11-13 18:13:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:41,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:13:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:13:41,306 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:13:41,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:13:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:13:58,668 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:14:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:14:13,984 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:14:13,985 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:14:13,986 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:14:14,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:14,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:14:14,217 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:14:14,222 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:14:14,321 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-13 18:14:14,326 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-13 18:14:14,417 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:14:14,420 INFO L158 Benchmark]: Toolchain (without parser) took 93109.49ms. Allocated memory was 54.5MB in the beginning and 331.4MB in the end (delta: 276.8MB). Free memory was 35.7MB in the beginning and 99.2MB in the end (delta: -63.4MB). Peak memory consumption was 213.2MB. Max. memory is 16.1GB. [2021-11-13 18:14:14,421 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 54.5MB. Free memory is still 34.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:14:14,421 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2166.29ms. Allocated memory was 54.5MB in the beginning and 98.6MB in the end (delta: 44.0MB). Free memory was 35.5MB in the beginning and 52.4MB in the end (delta: -16.9MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2021-11-13 18:14:14,422 INFO L158 Benchmark]: Boogie Procedure Inliner took 232.72ms. Allocated memory is still 98.6MB. Free memory was 52.4MB in the beginning and 57.8MB in the end (delta: -5.3MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2021-11-13 18:14:14,422 INFO L158 Benchmark]: Boogie Preprocessor took 218.52ms. Allocated memory is still 98.6MB. Free memory was 57.8MB in the beginning and 46.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:14:14,423 INFO L158 Benchmark]: RCFGBuilder took 6665.00ms. Allocated memory was 98.6MB in the beginning and 157.3MB in the end (delta: 58.7MB). Free memory was 45.9MB in the beginning and 61.5MB in the end (delta: -15.6MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. [2021-11-13 18:14:14,425 INFO L158 Benchmark]: TraceAbstraction took 83818.63ms. Allocated memory was 157.3MB in the beginning and 331.4MB in the end (delta: 174.1MB). Free memory was 60.4MB in the beginning and 99.2MB in the end (delta: -38.7MB). Peak memory consumption was 135.3MB. Max. memory is 16.1GB. [2021-11-13 18:14:14,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 54.5MB. Free memory is still 34.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2166.29ms. Allocated memory was 54.5MB in the beginning and 98.6MB in the end (delta: 44.0MB). Free memory was 35.5MB in the beginning and 52.4MB in the end (delta: -16.9MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 232.72ms. Allocated memory is still 98.6MB. Free memory was 52.4MB in the beginning and 57.8MB in the end (delta: -5.3MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 218.52ms. Allocated memory is still 98.6MB. Free memory was 57.8MB in the beginning and 46.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 6665.00ms. Allocated memory was 98.6MB in the beginning and 157.3MB in the end (delta: 58.7MB). Free memory was 45.9MB in the beginning and 61.5MB in the end (delta: -15.6MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. * TraceAbstraction took 83818.63ms. Allocated memory was 157.3MB in the beginning and 331.4MB in the end (delta: 174.1MB). Free memory was 60.4MB in the beginning and 99.2MB in the end (delta: -38.7MB). Peak memory consumption was 135.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:14:14,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b2d4e78-2aed-472a-8cf0-5680e25ec165/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null