./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a --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 bdcb32e90fffda272ef4414cda96d9fa59a53e22555da4af86a588968a9c4dd7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 13:55:31,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:55:31,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:55:31,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:55:31,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:55:31,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:55:31,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:55:31,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:55:31,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:55:31,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:55:31,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:55:31,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:55:31,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:55:31,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:55:31,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:55:31,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:55:31,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:55:31,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:55:31,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:55:31,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:55:31,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:55:31,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:55:31,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:55:31,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:55:31,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:55:31,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:55:31,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:55:31,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:55:31,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:55:31,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:55:31,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:55:31,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:55:31,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:55:31,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:55:31,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:55:31,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:55:31,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:55:31,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:55:31,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:55:31,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:55:31,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:55:31,913 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-21 13:55:31,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:55:31,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:55:31,958 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:55:31,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:55:31,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:55:31,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:55:31,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:55:31,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:55:31,965 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:55:31,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:55:31,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:55:31,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:55:31,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:55:31,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:55:31,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:55:31,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:55:31,968 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:55:31,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:55:31,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:55:31,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:55:31,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:55:31,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:55:31,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:55:31,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:55:31,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:55:31,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:55:31,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:55:31,972 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:55:31,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:55:31,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:55:31,973 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_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdcb32e90fffda272ef4414cda96d9fa59a53e22555da4af86a588968a9c4dd7 [2022-11-21 13:55:32,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:55:32,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:55:32,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:55:32,331 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:55:32,332 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:55:32,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i [2022-11-21 13:55:35,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:55:36,043 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:55:36,044 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i [2022-11-21 13:55:36,098 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/data/bb9dfe30b/4082e9869b9244588310c70af3483bc3/FLAG6044acb5b [2022-11-21 13:55:36,118 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/data/bb9dfe30b/4082e9869b9244588310c70af3483bc3 [2022-11-21 13:55:36,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:55:36,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:55:36,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:55:36,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:55:36,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:55:36,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:36" (1/1) ... [2022-11-21 13:55:36,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9871f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:36, skipping insertion in model container [2022-11-21 13:55:36,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:36" (1/1) ... [2022-11-21 13:55:36,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:55:36,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:55:39,302 WARN L237 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_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i[355549,355562] [2022-11-21 13:55:39,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:55:39,417 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:55:39,870 WARN L237 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_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i[355549,355562] [2022-11-21 13:55:39,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:55:40,088 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:55:40,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40 WrapperNode [2022-11-21 13:55:40,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:55:40,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:55:40,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:55:40,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:55:40,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,425 INFO L138 Inliner]: procedures = 409, calls = 2615, calls flagged for inlining = 208, calls inlined = 189, statements flattened = 5778 [2022-11-21 13:55:40,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:55:40,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:55:40,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:55:40,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:55:40,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,721 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:55:40,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:55:40,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:55:40,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:55:40,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (1/1) ... [2022-11-21 13:55:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:55:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:40,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:55:40,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:55:40,852 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_link_speed [2022-11-21 13:55:40,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_link_speed [2022-11-21 13:55:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-21 13:55:40,853 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-21 13:55:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-21 13:55:40,853 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-21 13:55:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-21 13:55:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-21 13:55:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure ql_link_state_machine_work [2022-11-21 13:55:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_link_state_machine_work [2022-11-21 13:55:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2022-11-21 13:55:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2022-11-21 13:55:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-21 13:55:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-21 13:55:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-21 13:55:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-21 13:55:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2022-11-21 13:55:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2022-11-21 13:55:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-21 13:55:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-21 13:55:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure ql_this_adapter_controls_port [2022-11-21 13:55:40,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_this_adapter_controls_port [2022-11-21 13:55:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_3 [2022-11-21 13:55:40,856 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_3 [2022-11-21 13:55:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure ql_enable_interrupts [2022-11-21 13:55:40,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_enable_interrupts [2022-11-21 13:55:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-21 13:55:40,856 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-21 13:55:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-21 13:55:40,857 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-21 13:55:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg_l [2022-11-21 13:55:40,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg_l [2022-11-21 13:55:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_send_free_list [2022-11-21 13:55:40,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_send_free_list [2022-11-21 13:55:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-21 13:55:40,859 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-21 13:55:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-21 13:55:40,859 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-21 13:55:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure ssleep [2022-11-21 13:55:40,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ssleep [2022-11-21 13:55:40,860 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_set_mac_address [2022-11-21 13:55:40,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_set_mac_address [2022-11-21 13:55:40,860 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cycle_adapter [2022-11-21 13:55:40,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cycle_adapter [2022-11-21 13:55:40,860 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mac_cfg_soft_reset [2022-11-21 13:55:40,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mac_cfg_soft_reset [2022-11-21 13:55:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-21 13:55:40,861 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-21 13:55:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-21 13:55:40,861 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-21 13:55:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-21 13:55:40,862 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-21 13:55:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_disable_scan_mode [2022-11-21 13:55:40,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_disable_scan_mode [2022-11-21 13:55:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-21 13:55:40,862 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-21 13:55:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-21 13:55:40,863 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-21 13:55:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:55:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-21 13:55:40,864 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-21 13:55:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg_l [2022-11-21 13:55:40,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg_l [2022-11-21 13:55:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_up [2022-11-21 13:55:40,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_up [2022-11-21 13:55:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-21 13:55:40,865 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-21 13:55:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-21 13:55:40,866 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-21 13:55:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_consistent_dma_mask [2022-11-21 13:55:40,866 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_consistent_dma_mask [2022-11-21 13:55:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-21 13:55:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-21 13:55:40,867 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-21 13:55:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-21 13:55:40,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-21 13:55:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-21 13:55:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_5 [2022-11-21 13:55:40,868 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_5 [2022-11-21 13:55:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page1_reg [2022-11-21 13:55:40,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page1_reg [2022-11-21 13:55:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:55:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-21 13:55:40,869 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-21 13:55:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-21 13:55:40,870 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-21 13:55:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-21 13:55:40,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-21 13:55:40,871 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2022-11-21 13:55:40,871 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2022-11-21 13:55:40,871 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2022-11-21 13:55:40,871 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2022-11-21 13:55:40,871 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_register_page [2022-11-21 13:55:40,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_register_page [2022-11-21 13:55:40,872 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-21 13:55:40,872 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-21 13:55:40,872 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg_ex [2022-11-21 13:55:40,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg_ex [2022-11-21 13:55:40,872 INFO L130 BoogieDeclarations]: Found specification of procedure ql_phy_init_ex [2022-11-21 13:55:40,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_phy_init_ex [2022-11-21 13:55:40,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-21 13:55:40,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-21 13:55:40,873 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg_l [2022-11-21 13:55:40,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg_l [2022-11-21 13:55:40,874 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg [2022-11-21 13:55:40,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg [2022-11-21 13:55:40,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 13:55:40,874 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_spinlock [2022-11-21 13:55:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_spinlock [2022-11-21 13:55:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page2_reg [2022-11-21 13:55:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page2_reg [2022-11-21 13:55:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:55:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_5 [2022-11-21 13:55:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_5 [2022-11-21 13:55:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg [2022-11-21 13:55:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg [2022-11-21 13:55:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-21 13:55:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-21 13:55:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 13:55:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg [2022-11-21 13:55:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg [2022-11-21 13:55:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_unlock [2022-11-21 13:55:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_unlock [2022-11-21 13:55:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-21 13:55:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-21 13:55:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_nvram_reg [2022-11-21 13:55:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_nvram_reg [2022-11-21 13:55:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-21 13:55:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-21 13:55:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2022-11-21 13:55:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2022-11-21 13:55:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_drvr_lock [2022-11-21 13:55:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_drvr_lock [2022-11-21 13:55:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2022-11-21 13:55:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2022-11-21 13:55:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_enable_scan_mode [2022-11-21 13:55:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_enable_scan_mode [2022-11-21 13:55:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2022-11-21 13:55:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2022-11-21 13:55:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure ql_tx_timeout_work [2022-11-21 13:55:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_tx_timeout_work [2022-11-21 13:55:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-21 13:55:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-21 13:55:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-21 13:55:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-21 13:55:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:55:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:55:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_mii_ready [2022-11-21 13:55:40,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_mii_ready [2022-11-21 13:55:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-21 13:55:40,892 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-21 13:55:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_large_buffers [2022-11-21 13:55:40,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_large_buffers [2022-11-21 13:55:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-21 13:55:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-21 13:55:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-21 13:55:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-21 13:55:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-21 13:55:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-21 13:55:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-21 13:55:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-21 13:55:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_interrupts [2022-11-21 13:55:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_interrupts [2022-11-21 13:55:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-11-21 13:55:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-11-21 13:55:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2022-11-21 13:55:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2022-11-21 13:55:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg [2022-11-21 13:55:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg [2022-11-21 13:55:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-21 13:55:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-21 13:55:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2022-11-21 13:55:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2022-11-21 13:55:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-21 13:55:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-21 13:55:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure PHY_Setup [2022-11-21 13:55:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure PHY_Setup [2022-11-21 13:55:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-21 13:55:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-21 13:55:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_buffer_queues [2022-11-21 13:55:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_buffer_queues [2022-11-21 13:55:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 13:55:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 13:55:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-21 13:55:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-21 13:55:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-21 13:55:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-21 13:55:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2022-11-21 13:55:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2022-11-21 13:55:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-21 13:55:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-21 13:55:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:55:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-21 13:55:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-21 13:55:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 13:55:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-21 13:55:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-21 13:55:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_3 [2022-11-21 13:55:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_3 [2022-11-21 13:55:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 13:55:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_3 [2022-11-21 13:55:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_3 [2022-11-21 13:55:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2022-11-21 13:55:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2022-11-21 13:55:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-21 13:55:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-21 13:55:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-21 13:55:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-21 13:55:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page0_reg [2022-11-21 13:55:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page0_reg [2022-11-21 13:55:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-21 13:55:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-21 13:55:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_link_full_dup [2022-11-21 13:55:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_link_full_dup [2022-11-21 13:55:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure ql_reset_work [2022-11-21 13:55:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_reset_work [2022-11-21 13:55:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-21 13:55:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-21 13:55:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_tx_timeout [2022-11-21 13:55:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_tx_timeout [2022-11-21 13:55:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure ql_supported_modes [2022-11-21 13:55:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_supported_modes [2022-11-21 13:55:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2022-11-21 13:55:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2022-11-21 13:55:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-21 13:55:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-21 13:55:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_fiber [2022-11-21 13:55:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_fiber [2022-11-21 13:55:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2022-11-21 13:55:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2022-11-21 13:55:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-21 13:55:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-21 13:55:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_net_req_rsp_queues [2022-11-21 13:55:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_net_req_rsp_queues [2022-11-21 13:55:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:55:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2022-11-21 13:55:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2022-11-21 13:55:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-21 13:55:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-21 13:55:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg_ex [2022-11-21 13:55:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg_ex [2022-11-21 13:55:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_down [2022-11-21 13:55:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_down [2022-11-21 13:55:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-21 13:55:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-21 13:55:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure ql_port_start [2022-11-21 13:55:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_port_start [2022-11-21 13:55:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-21 13:55:40,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-21 13:55:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2022-11-21 13:55:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2022-11-21 13:55:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_auto_cfg_status [2022-11-21 13:55:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_auto_cfg_status [2022-11-21 13:55:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg [2022-11-21 13:55:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg [2022-11-21 13:55:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_3 [2022-11-21 13:55:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_3 [2022-11-21 13:55:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-21 13:55:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-21 13:55:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-21 13:55:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-21 13:55:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2022-11-21 13:55:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2022-11-21 13:55:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-21 13:55:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-21 13:55:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2022-11-21 13:55:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:55:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr [2022-11-21 13:55:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr [2022-11-21 13:55:42,020 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:55:42,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:55:42,405 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-21 13:55:48,011 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:55:48,031 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:55:48,031 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 13:55:48,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:48 BoogieIcfgContainer [2022-11-21 13:55:48,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:55:48,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:55:48,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:55:48,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:55:48,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:55:36" (1/3) ... [2022-11-21 13:55:48,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476aa74f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:48, skipping insertion in model container [2022-11-21 13:55:48,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:40" (2/3) ... [2022-11-21 13:55:48,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476aa74f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:48, skipping insertion in model container [2022-11-21 13:55:48,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:48" (3/3) ... [2022-11-21 13:55:48,051 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i [2022-11-21 13:55:48,074 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:55:48,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:55:48,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:55:48,224 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e459a7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:55:48,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 13:55:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 2266 states, 1513 states have (on average 1.3027098479841375) internal successors, (1971), 1569 states have internal predecessors, (1971), 626 states have call successors, (626), 126 states have call predecessors, (626), 125 states have return successors, (616), 603 states have call predecessors, (616), 616 states have call successors, (616) [2022-11-21 13:55:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-21 13:55:48,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:48,293 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:48,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1290064966, now seen corresponding path program 1 times [2022-11-21 13:55:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:48,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436735418] [2022-11-21 13:55:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:48,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:48,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:48,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436735418] [2022-11-21 13:55:48,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:55:48,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809934166] [2022-11-21 13:55:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:48,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:48,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:55:48,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:55:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 3425 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 13:55:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-21 13:55:50,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:50,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809934166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:50,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:50,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:55:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275948621] [2022-11-21 13:55:50,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:50,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:55:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:50,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:55:50,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:55:50,584 INFO L87 Difference]: Start difference. First operand has 2266 states, 1513 states have (on average 1.3027098479841375) internal successors, (1971), 1569 states have internal predecessors, (1971), 626 states have call successors, (626), 126 states have call predecessors, (626), 125 states have return successors, (616), 603 states have call predecessors, (616), 616 states have call successors, (616) Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-21 13:55:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:50,819 INFO L93 Difference]: Finished difference Result 4527 states and 6469 transitions. [2022-11-21 13:55:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:55:50,821 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 205 [2022-11-21 13:55:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:50,858 INFO L225 Difference]: With dead ends: 4527 [2022-11-21 13:55:50,858 INFO L226 Difference]: Without dead ends: 2240 [2022-11-21 13:55:50,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:55:50,883 INFO L413 NwaCegarLoop]: 3209 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:50,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3209 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:55:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2022-11-21 13:55:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2240. [2022-11-21 13:55:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1499 states have (on average 1.2928619079386257) internal successors, (1938), 1543 states have internal predecessors, (1938), 616 states have call successors, (616), 125 states have call predecessors, (616), 124 states have return successors, (615), 602 states have call predecessors, (615), 615 states have call successors, (615) [2022-11-21 13:55:51,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3169 transitions. [2022-11-21 13:55:51,218 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3169 transitions. Word has length 205 [2022-11-21 13:55:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:51,219 INFO L495 AbstractCegarLoop]: Abstraction has 2240 states and 3169 transitions. [2022-11-21 13:55:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-21 13:55:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3169 transitions. [2022-11-21 13:55:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-21 13:55:51,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:51,236 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:51,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:51,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 13:55:51,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:51,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1174632890, now seen corresponding path program 1 times [2022-11-21 13:55:51,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:51,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174102417] [2022-11-21 13:55:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:51,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:51,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:55:51,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356169226] [2022-11-21 13:55:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:51,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:51,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:55:51,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:55:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 3425 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:55:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-11-21 13:55:53,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:53,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:53,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174102417] [2022-11-21 13:55:53,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:55:53,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356169226] [2022-11-21 13:55:53,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356169226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:53,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:53,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:55:53,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072038938] [2022-11-21 13:55:53,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:53,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:55:53,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:55:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:55:53,320 INFO L87 Difference]: Start difference. First operand 2240 states and 3169 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 13:55:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:53,807 INFO L93 Difference]: Finished difference Result 6356 states and 9002 transitions. [2022-11-21 13:55:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:55:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 205 [2022-11-21 13:55:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:53,860 INFO L225 Difference]: With dead ends: 6356 [2022-11-21 13:55:53,860 INFO L226 Difference]: Without dead ends: 4143 [2022-11-21 13:55:53,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:55:53,879 INFO L413 NwaCegarLoop]: 3666 mSDtfsCounter, 2790 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2790 SdHoareTripleChecker+Valid, 6658 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:53,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2790 Valid, 6658 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:55:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-11-21 13:55:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4127. [2022-11-21 13:55:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 2764 states have (on average 1.2926917510853835) internal successors, (3573), 2850 states have internal predecessors, (3573), 1131 states have call successors, (1131), 232 states have call predecessors, (1131), 231 states have return successors, (1130), 1101 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-11-21 13:55:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 5834 transitions. [2022-11-21 13:55:54,156 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 5834 transitions. Word has length 205 [2022-11-21 13:55:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:54,159 INFO L495 AbstractCegarLoop]: Abstraction has 4127 states and 5834 transitions. [2022-11-21 13:55:54,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 13:55:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 5834 transitions. [2022-11-21 13:55:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-11-21 13:55:54,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:54,183 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:54,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:54,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:54,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1079746045, now seen corresponding path program 1 times [2022-11-21 13:55:54,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:54,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816061221] [2022-11-21 13:55:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:54,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:54,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:54,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816061221] [2022-11-21 13:55:54,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:55:54,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024319156] [2022-11-21 13:55:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:54,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:54,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:55:54,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:55:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 4473 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:55:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-21 13:55:56,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:56,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024319156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:56,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:56,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:55:56,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107560425] [2022-11-21 13:55:56,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:56,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:55:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:55:56,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:55:56,563 INFO L87 Difference]: Start difference. First operand 4127 states and 5834 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-21 13:55:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:56,831 INFO L93 Difference]: Finished difference Result 8253 states and 11679 transitions. [2022-11-21 13:55:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:55:56,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 396 [2022-11-21 13:55:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:56,858 INFO L225 Difference]: With dead ends: 8253 [2022-11-21 13:55:56,859 INFO L226 Difference]: Without dead ends: 4153 [2022-11-21 13:55:56,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:55:56,879 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 11 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:56,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6332 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:55:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2022-11-21 13:55:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 4129. [2022-11-21 13:55:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 2766 states have (on average 1.292480115690528) internal successors, (3575), 2852 states have internal predecessors, (3575), 1131 states have call successors, (1131), 232 states have call predecessors, (1131), 231 states have return successors, (1130), 1101 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-11-21 13:55:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 5836 transitions. [2022-11-21 13:55:57,069 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 5836 transitions. Word has length 396 [2022-11-21 13:55:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:57,070 INFO L495 AbstractCegarLoop]: Abstraction has 4129 states and 5836 transitions. [2022-11-21 13:55:57,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 2 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-21 13:55:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 5836 transitions. [2022-11-21 13:55:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-21 13:55:57,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:57,087 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:57,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:57,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:57,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1044062109, now seen corresponding path program 1 times [2022-11-21 13:55:57,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:57,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783296052] [2022-11-21 13:55:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:57,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:57,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:55:57,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797341259] [2022-11-21 13:55:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:57,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:57,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:55:57,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:55:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 4198 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:55:59,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-11-21 13:55:59,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:59,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783296052] [2022-11-21 13:55:59,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:55:59,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797341259] [2022-11-21 13:55:59,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797341259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:59,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:59,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:55:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776930473] [2022-11-21 13:55:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:55:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:55:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:55:59,079 INFO L87 Difference]: Start difference. First operand 4129 states and 5836 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-21 13:55:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:59,391 INFO L93 Difference]: Finished difference Result 8239 states and 11690 transitions. [2022-11-21 13:55:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:55:59,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 326 [2022-11-21 13:55:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:59,429 INFO L225 Difference]: With dead ends: 8239 [2022-11-21 13:55:59,429 INFO L226 Difference]: Without dead ends: 4137 [2022-11-21 13:55:59,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:55:59,460 INFO L413 NwaCegarLoop]: 3168 mSDtfsCounter, 2 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6333 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:59,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6333 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:55:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2022-11-21 13:55:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 4131. [2022-11-21 13:55:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4131 states, 2768 states have (on average 1.2922687861271676) internal successors, (3577), 2854 states have internal predecessors, (3577), 1131 states have call successors, (1131), 232 states have call predecessors, (1131), 231 states have return successors, (1130), 1101 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-11-21 13:55:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4131 states to 4131 states and 5838 transitions. [2022-11-21 13:55:59,683 INFO L78 Accepts]: Start accepts. Automaton has 4131 states and 5838 transitions. Word has length 326 [2022-11-21 13:55:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:59,684 INFO L495 AbstractCegarLoop]: Abstraction has 4131 states and 5838 transitions. [2022-11-21 13:55:59,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-21 13:55:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4131 states and 5838 transitions. [2022-11-21 13:55:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-11-21 13:55:59,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:59,698 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:59,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:59,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:59,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:59,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1504282175, now seen corresponding path program 1 times [2022-11-21 13:55:59,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:59,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383259550] [2022-11-21 13:55:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:59,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:00,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:56:00,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672275441] [2022-11-21 13:56:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:00,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:00,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:00,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:00,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:56:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 4236 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:56:01,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-11-21 13:56:01,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:01,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:01,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383259550] [2022-11-21 13:56:01,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:56:01,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672275441] [2022-11-21 13:56:01,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672275441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:01,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:01,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:56:01,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146361238] [2022-11-21 13:56:01,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:01,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:56:01,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:56:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:56:01,797 INFO L87 Difference]: Start difference. First operand 4131 states and 5838 transitions. Second operand has 6 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 5 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 5 states have call successors, (39) [2022-11-21 13:56:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:02,246 INFO L93 Difference]: Finished difference Result 8317 states and 11793 transitions. [2022-11-21 13:56:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:56:02,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 5 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 5 states have call successors, (39) Word has length 333 [2022-11-21 13:56:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:02,285 INFO L225 Difference]: With dead ends: 8317 [2022-11-21 13:56:02,285 INFO L226 Difference]: Without dead ends: 4213 [2022-11-21 13:56:02,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:56:02,315 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 101 mSDsluCounter, 12541 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 15717 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:02,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 15717 Invalid, 102 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:56:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2022-11-21 13:56:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4213. [2022-11-21 13:56:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 2816 states have (on average 1.2908380681818181) internal successors, (3635), 2902 states have internal predecessors, (3635), 1161 states have call successors, (1161), 234 states have call predecessors, (1161), 235 states have return successors, (1162), 1131 states have call predecessors, (1162), 1160 states have call successors, (1162) [2022-11-21 13:56:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 5958 transitions. [2022-11-21 13:56:02,529 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 5958 transitions. Word has length 333 [2022-11-21 13:56:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:02,530 INFO L495 AbstractCegarLoop]: Abstraction has 4213 states and 5958 transitions. [2022-11-21 13:56:02,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 5 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 5 states have call successors, (39) [2022-11-21 13:56:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 5958 transitions. [2022-11-21 13:56:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-21 13:56:02,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:02,551 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:02,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:02,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:02,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -468061034, now seen corresponding path program 1 times [2022-11-21 13:56:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:02,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927838479] [2022-11-21 13:56:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:03,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:03,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927838479] [2022-11-21 13:56:03,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:03,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262173839] [2022-11-21 13:56:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:03,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:03,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:03,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:56:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:04,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 4520 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:56:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-21 13:56:04,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-21 13:56:05,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262173839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:05,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:05,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-21 13:56:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87878646] [2022-11-21 13:56:05,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:56:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:56:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:56:05,316 INFO L87 Difference]: Start difference. First operand 4213 states and 5958 transitions. Second operand has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-21 13:56:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:05,634 INFO L93 Difference]: Finished difference Result 8477 states and 12003 transitions. [2022-11-21 13:56:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:56:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 405 [2022-11-21 13:56:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:05,676 INFO L225 Difference]: With dead ends: 8477 [2022-11-21 13:56:05,677 INFO L226 Difference]: Without dead ends: 4291 [2022-11-21 13:56:05,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 804 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:56:05,698 INFO L413 NwaCegarLoop]: 3175 mSDtfsCounter, 51 mSDsluCounter, 9484 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 12659 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:05,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 12659 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:56:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2022-11-21 13:56:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 4291. [2022-11-21 13:56:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 2876 states have (on average 1.28894297635605) internal successors, (3707), 2962 states have internal predecessors, (3707), 1179 states have call successors, (1179), 234 states have call predecessors, (1179), 235 states have return successors, (1180), 1149 states have call predecessors, (1180), 1178 states have call successors, (1180) [2022-11-21 13:56:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 6066 transitions. [2022-11-21 13:56:05,879 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 6066 transitions. Word has length 405 [2022-11-21 13:56:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:05,880 INFO L495 AbstractCegarLoop]: Abstraction has 4291 states and 6066 transitions. [2022-11-21 13:56:05,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 2 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-21 13:56:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 6066 transitions. [2022-11-21 13:56:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-21 13:56:05,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:05,902 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:05,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:06,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 13:56:06,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 221103957, now seen corresponding path program 1 times [2022-11-21 13:56:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344072184] [2022-11-21 13:56:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:06,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:06,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344072184] [2022-11-21 13:56:06,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:06,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518216917] [2022-11-21 13:56:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:06,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:06,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:06,399 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:06,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:56:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 4692 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:56:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-21 13:56:08,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-21 13:56:08,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518216917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:08,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:08,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-21 13:56:08,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760005636] [2022-11-21 13:56:08,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:08,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:56:08,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:56:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:56:08,675 INFO L87 Difference]: Start difference. First operand 4291 states and 6066 transitions. Second operand has 12 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 states have internal predecessors, (310), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2022-11-21 13:56:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:09,216 INFO L93 Difference]: Finished difference Result 8711 states and 12333 transitions. [2022-11-21 13:56:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:56:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 states have internal predecessors, (310), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) Word has length 447 [2022-11-21 13:56:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:09,262 INFO L225 Difference]: With dead ends: 8711 [2022-11-21 13:56:09,262 INFO L226 Difference]: Without dead ends: 4447 [2022-11-21 13:56:09,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 882 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:56:09,295 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 140 mSDsluCounter, 15881 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 19074 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:09,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 19074 Invalid, 144 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:56:09,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-11-21 13:56:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 4447. [2022-11-21 13:56:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 2996 states have (on average 1.2853805073431241) internal successors, (3851), 3082 states have internal predecessors, (3851), 1215 states have call successors, (1215), 234 states have call predecessors, (1215), 235 states have return successors, (1216), 1185 states have call predecessors, (1216), 1214 states have call successors, (1216) [2022-11-21 13:56:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6282 transitions. [2022-11-21 13:56:09,571 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6282 transitions. Word has length 447 [2022-11-21 13:56:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:09,572 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 6282 transitions. [2022-11-21 13:56:09,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 states have internal predecessors, (310), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2022-11-21 13:56:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6282 transitions. [2022-11-21 13:56:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-11-21 13:56:09,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:09,596 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:09,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-21 13:56:09,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 13:56:09,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash 892637637, now seen corresponding path program 2 times [2022-11-21 13:56:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:09,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682070724] [2022-11-21 13:56:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:09,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:10,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:10,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682070724] [2022-11-21 13:56:10,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304180626] [2022-11-21 13:56:10,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:56:10,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:10,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:10,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:56:11,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:56:11,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:56:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:56:11,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2022-11-21 13:56:11,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:11,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304180626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:11,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:11,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:56:11,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833982085] [2022-11-21 13:56:11,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:56:11,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:11,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:56:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:11,618 INFO L87 Difference]: Start difference. First operand 4447 states and 6282 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2022-11-21 13:56:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:12,296 INFO L93 Difference]: Finished difference Result 9387 states and 13370 transitions. [2022-11-21 13:56:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:56:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 471 [2022-11-21 13:56:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:12,330 INFO L225 Difference]: With dead ends: 9387 [2022-11-21 13:56:12,330 INFO L226 Difference]: Without dead ends: 4967 [2022-11-21 13:56:12,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:12,353 INFO L413 NwaCegarLoop]: 3565 mSDtfsCounter, 377 mSDsluCounter, 6542 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 10107 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:12,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 10107 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:56:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2022-11-21 13:56:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4451. [2022-11-21 13:56:12,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 3000 states have (on average 1.285) internal successors, (3855), 3086 states have internal predecessors, (3855), 1215 states have call successors, (1215), 234 states have call predecessors, (1215), 235 states have return successors, (1216), 1185 states have call predecessors, (1216), 1214 states have call successors, (1216) [2022-11-21 13:56:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 6286 transitions. [2022-11-21 13:56:12,579 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 6286 transitions. Word has length 471 [2022-11-21 13:56:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:12,580 INFO L495 AbstractCegarLoop]: Abstraction has 4451 states and 6286 transitions. [2022-11-21 13:56:12,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2022-11-21 13:56:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 6286 transitions. [2022-11-21 13:56:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-21 13:56:12,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:12,598 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:12,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:12,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1728941518, now seen corresponding path program 1 times [2022-11-21 13:56:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:12,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422358677] [2022-11-21 13:56:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:12,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:13,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422358677] [2022-11-21 13:56:13,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574373423] [2022-11-21 13:56:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:13,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:13,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:13,111 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:13,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:56:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:14,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 4693 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:56:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 24 proven. 190 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-21 13:56:15,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2022-11-21 13:56:15,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574373423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:15,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:15,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-21 13:56:15,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835479254] [2022-11-21 13:56:15,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:15,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:56:15,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:56:15,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:56:15,915 INFO L87 Difference]: Start difference. First operand 4451 states and 6286 transitions. Second operand has 24 states, 24 states have (on average 14.291666666666666) internal successors, (343), 24 states have internal predecessors, (343), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2022-11-21 13:56:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:16,623 INFO L93 Difference]: Finished difference Result 9187 states and 13001 transitions. [2022-11-21 13:56:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:56:16,625 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.291666666666666) internal successors, (343), 24 states have internal predecessors, (343), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) Word has length 447 [2022-11-21 13:56:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:16,656 INFO L225 Difference]: With dead ends: 9187 [2022-11-21 13:56:16,657 INFO L226 Difference]: Without dead ends: 4763 [2022-11-21 13:56:16,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:56:16,679 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 400 mSDsluCounter, 9715 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 12944 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:16,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 12944 Invalid, 407 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [133 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:56:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2022-11-21 13:56:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 4763. [2022-11-21 13:56:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 3240 states have (on average 1.2787037037037037) internal successors, (4143), 3326 states have internal predecessors, (4143), 1287 states have call successors, (1287), 234 states have call predecessors, (1287), 235 states have return successors, (1288), 1257 states have call predecessors, (1288), 1286 states have call successors, (1288) [2022-11-21 13:56:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 6718 transitions. [2022-11-21 13:56:16,892 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 6718 transitions. Word has length 447 [2022-11-21 13:56:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:16,893 INFO L495 AbstractCegarLoop]: Abstraction has 4763 states and 6718 transitions. [2022-11-21 13:56:16,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.291666666666666) internal successors, (343), 24 states have internal predecessors, (343), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2022-11-21 13:56:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 6718 transitions. [2022-11-21 13:56:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-11-21 13:56:16,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:16,908 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:16,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:17,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 13:56:17,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash 278583260, now seen corresponding path program 1 times [2022-11-21 13:56:17,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106587261] [2022-11-21 13:56:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:17,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:17,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:56:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818804787] [2022-11-21 13:56:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:17,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:17,288 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:17,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:56:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:18,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 4440 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:56:18,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-11-21 13:56:18,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106587261] [2022-11-21 13:56:18,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:56:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818804787] [2022-11-21 13:56:18,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818804787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:18,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:18,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:56:18,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66191892] [2022-11-21 13:56:18,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:18,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:56:18,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:56:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:18,975 INFO L87 Difference]: Start difference. First operand 4763 states and 6718 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (46), 3 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-21 13:56:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:19,247 INFO L93 Difference]: Finished difference Result 9609 states and 13616 transitions. [2022-11-21 13:56:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:56:19,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (46), 3 states have call predecessors, (46), 2 states have call successors, (46) Word has length 372 [2022-11-21 13:56:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:19,274 INFO L225 Difference]: With dead ends: 9609 [2022-11-21 13:56:19,275 INFO L226 Difference]: Without dead ends: 4873 [2022-11-21 13:56:19,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:19,297 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 42 mSDsluCounter, 9595 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 12807 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:19,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 12807 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:56:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2022-11-21 13:56:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4771. [2022-11-21 13:56:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4771 states, 3246 states have (on average 1.27818853974122) internal successors, (4149), 3332 states have internal predecessors, (4149), 1287 states have call successors, (1287), 234 states have call predecessors, (1287), 237 states have return successors, (1292), 1259 states have call predecessors, (1292), 1286 states have call successors, (1292) [2022-11-21 13:56:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 6728 transitions. [2022-11-21 13:56:19,537 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 6728 transitions. Word has length 372 [2022-11-21 13:56:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:19,538 INFO L495 AbstractCegarLoop]: Abstraction has 4771 states and 6728 transitions. [2022-11-21 13:56:19,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (46), 3 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-21 13:56:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 6728 transitions. [2022-11-21 13:56:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-11-21 13:56:19,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:19,556 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:19,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:19,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:19,774 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1053817431, now seen corresponding path program 1 times [2022-11-21 13:56:19,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:19,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254490763] [2022-11-21 13:56:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:19,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:56:19,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711211821] [2022-11-21 13:56:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:19,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:19,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:19,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 13:56:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:21,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 4460 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:56:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-11-21 13:56:21,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:21,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254490763] [2022-11-21 13:56:21,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:56:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711211821] [2022-11-21 13:56:21,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711211821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:21,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:21,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:56:21,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097893131] [2022-11-21 13:56:21,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:21,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:56:21,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:56:21,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:21,873 INFO L87 Difference]: Start difference. First operand 4771 states and 6728 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 3 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2022-11-21 13:56:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:22,109 INFO L93 Difference]: Finished difference Result 9557 states and 13530 transitions. [2022-11-21 13:56:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:56:22,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 3 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 382 [2022-11-21 13:56:22,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:22,144 INFO L225 Difference]: With dead ends: 9557 [2022-11-21 13:56:22,144 INFO L226 Difference]: Without dead ends: 4813 [2022-11-21 13:56:22,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:22,172 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 13 mSDsluCounter, 6330 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9503 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:22,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9503 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:56:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2022-11-21 13:56:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 4789. [2022-11-21 13:56:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 3258 states have (on average 1.2777777777777777) internal successors, (4163), 3344 states have internal predecessors, (4163), 1293 states have call successors, (1293), 234 states have call predecessors, (1293), 237 states have return successors, (1298), 1265 states have call predecessors, (1298), 1292 states have call successors, (1298) [2022-11-21 13:56:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 6754 transitions. [2022-11-21 13:56:22,565 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 6754 transitions. Word has length 382 [2022-11-21 13:56:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:22,566 INFO L495 AbstractCegarLoop]: Abstraction has 4789 states and 6754 transitions. [2022-11-21 13:56:22,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 3 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2022-11-21 13:56:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 6754 transitions. [2022-11-21 13:56:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-11-21 13:56:22,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:22,589 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:22,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:22,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:22,808 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:22,809 INFO L85 PathProgramCache]: Analyzing trace with hash -236179986, now seen corresponding path program 1 times [2022-11-21 13:56:22,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:22,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085592518] [2022-11-21 13:56:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:23,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:56:23,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937644307] [2022-11-21 13:56:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:23,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:23,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 13:56:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 4542 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:56:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-21 13:56:24,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-11-21 13:56:25,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:25,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085592518] [2022-11-21 13:56:25,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:56:25,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937644307] [2022-11-21 13:56:25,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937644307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:25,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:25,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-21 13:56:25,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654647653] [2022-11-21 13:56:25,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:25,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:56:25,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:25,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:56:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:56:25,364 INFO L87 Difference]: Start difference. First operand 4789 states and 6754 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 6 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 6 states have call predecessors, (71), 6 states have call successors, (71) [2022-11-21 13:56:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:25,700 INFO L93 Difference]: Finished difference Result 9643 states and 13660 transitions. [2022-11-21 13:56:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:56:25,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 6 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 6 states have call predecessors, (71), 6 states have call successors, (71) Word has length 404 [2022-11-21 13:56:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:25,734 INFO L225 Difference]: With dead ends: 9643 [2022-11-21 13:56:25,735 INFO L226 Difference]: Without dead ends: 4881 [2022-11-21 13:56:25,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:56:25,762 INFO L413 NwaCegarLoop]: 3182 mSDtfsCounter, 51 mSDsluCounter, 9499 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 12681 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:25,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 12681 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:56:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2022-11-21 13:56:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 4861. [2022-11-21 13:56:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4861 states, 3306 states have (on average 1.2761645493042952) internal successors, (4219), 3392 states have internal predecessors, (4219), 1317 states have call successors, (1317), 234 states have call predecessors, (1317), 237 states have return successors, (1322), 1289 states have call predecessors, (1322), 1316 states have call successors, (1322) [2022-11-21 13:56:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4861 states to 4861 states and 6858 transitions. [2022-11-21 13:56:26,000 INFO L78 Accepts]: Start accepts. Automaton has 4861 states and 6858 transitions. Word has length 404 [2022-11-21 13:56:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:26,001 INFO L495 AbstractCegarLoop]: Abstraction has 4861 states and 6858 transitions. [2022-11-21 13:56:26,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 6 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 6 states have call predecessors, (71), 6 states have call successors, (71) [2022-11-21 13:56:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4861 states and 6858 transitions. [2022-11-21 13:56:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-11-21 13:56:26,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:26,017 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:26,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-21 13:56:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 13:56:26,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash -872758565, now seen corresponding path program 1 times [2022-11-21 13:56:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:26,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985058955] [2022-11-21 13:56:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:26,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:26,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985058955] [2022-11-21 13:56:26,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:26,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142861166] [2022-11-21 13:56:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:26,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:26,506 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:26,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 13:56:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 4851 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 13:56:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 24 proven. 946 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-21 13:56:29,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2022-11-21 13:56:30,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142861166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:30,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:30,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-11-21 13:56:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242191549] [2022-11-21 13:56:30,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:30,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 13:56:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 13:56:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 13:56:30,488 INFO L87 Difference]: Start difference. First operand 4861 states and 6858 transitions. Second operand has 48 states, 48 states have (on average 9.166666666666666) internal successors, (440), 48 states have internal predecessors, (440), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2022-11-21 13:56:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:31,807 INFO L93 Difference]: Finished difference Result 10319 states and 14601 transitions. [2022-11-21 13:56:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-21 13:56:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 9.166666666666666) internal successors, (440), 48 states have internal predecessors, (440), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) Word has length 496 [2022-11-21 13:56:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:31,835 INFO L225 Difference]: With dead ends: 10319 [2022-11-21 13:56:31,836 INFO L226 Difference]: Without dead ends: 5485 [2022-11-21 13:56:31,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 13:56:31,861 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 833 mSDsluCounter, 9990 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 13291 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:31,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 13291 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 13:56:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2022-11-21 13:56:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 5485. [2022-11-21 13:56:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 3786 states have (on average 1.2665081880612783) internal successors, (4795), 3872 states have internal predecessors, (4795), 1461 states have call successors, (1461), 234 states have call predecessors, (1461), 237 states have return successors, (1466), 1433 states have call predecessors, (1466), 1460 states have call successors, (1466) [2022-11-21 13:56:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 7722 transitions. [2022-11-21 13:56:32,217 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 7722 transitions. Word has length 496 [2022-11-21 13:56:32,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:32,218 INFO L495 AbstractCegarLoop]: Abstraction has 5485 states and 7722 transitions. [2022-11-21 13:56:32,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 9.166666666666666) internal successors, (440), 48 states have internal predecessors, (440), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2022-11-21 13:56:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 7722 transitions. [2022-11-21 13:56:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-11-21 13:56:32,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:32,232 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:32,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:32,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 13:56:32,445 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 470319383, now seen corresponding path program 1 times [2022-11-21 13:56:32,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:32,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897352086] [2022-11-21 13:56:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:32,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:32,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:32,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897352086] [2022-11-21 13:56:32,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:32,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620088552] [2022-11-21 13:56:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:32,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:32,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:32,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 13:56:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 4677 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:56:34,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-11-21 13:56:34,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:34,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620088552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:34,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:34,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437181374] [2022-11-21 13:56:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:34,475 INFO L87 Difference]: Start difference. First operand 5485 states and 7722 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2022-11-21 13:56:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:34,652 INFO L93 Difference]: Finished difference Result 11027 states and 15582 transitions. [2022-11-21 13:56:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 430 [2022-11-21 13:56:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:34,681 INFO L225 Difference]: With dead ends: 11027 [2022-11-21 13:56:34,682 INFO L226 Difference]: Without dead ends: 5569 [2022-11-21 13:56:34,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:34,706 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 25 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6368 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:34,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6368 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:56:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2022-11-21 13:56:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 5509. [2022-11-21 13:56:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5509 states, 3802 states have (on average 1.266964755391899) internal successors, (4817), 3890 states have internal predecessors, (4817), 1469 states have call successors, (1469), 234 states have call predecessors, (1469), 237 states have return successors, (1474), 1441 states have call predecessors, (1474), 1468 states have call successors, (1474) [2022-11-21 13:56:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5509 states to 5509 states and 7760 transitions. [2022-11-21 13:56:34,928 INFO L78 Accepts]: Start accepts. Automaton has 5509 states and 7760 transitions. Word has length 430 [2022-11-21 13:56:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:34,929 INFO L495 AbstractCegarLoop]: Abstraction has 5509 states and 7760 transitions. [2022-11-21 13:56:34,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2022-11-21 13:56:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5509 states and 7760 transitions. [2022-11-21 13:56:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-11-21 13:56:34,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:34,942 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:34,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:35,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 13:56:35,155 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash 856181785, now seen corresponding path program 1 times [2022-11-21 13:56:35,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:35,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692795728] [2022-11-21 13:56:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:35,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692795728] [2022-11-21 13:56:35,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:35,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543214325] [2022-11-21 13:56:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:35,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:35,483 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:35,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 13:56:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 4674 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:56:37,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-11-21 13:56:37,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-21 13:56:37,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543214325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:37,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:37,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-21 13:56:37,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327872564] [2022-11-21 13:56:37,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:37,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:56:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:56:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:56:37,620 INFO L87 Difference]: Start difference. First operand 5509 states and 7760 transitions. Second operand has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 4 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (67), 4 states have call predecessors, (67), 4 states have call successors, (67) [2022-11-21 13:56:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:37,801 INFO L93 Difference]: Finished difference Result 11015 states and 15570 transitions. [2022-11-21 13:56:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:56:37,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 4 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (67), 4 states have call predecessors, (67), 4 states have call successors, (67) Word has length 430 [2022-11-21 13:56:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:37,828 INFO L225 Difference]: With dead ends: 11015 [2022-11-21 13:56:37,828 INFO L226 Difference]: Without dead ends: 5533 [2022-11-21 13:56:37,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:56:37,854 INFO L413 NwaCegarLoop]: 3170 mSDtfsCounter, 12 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6336 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:37,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6336 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:56:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2022-11-21 13:56:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 5533. [2022-11-21 13:56:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 3820 states have (on average 1.2657068062827226) internal successors, (4835), 3908 states have internal predecessors, (4835), 1475 states have call successors, (1475), 234 states have call predecessors, (1475), 237 states have return successors, (1480), 1447 states have call predecessors, (1480), 1474 states have call successors, (1480) [2022-11-21 13:56:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 7790 transitions. [2022-11-21 13:56:38,071 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 7790 transitions. Word has length 430 [2022-11-21 13:56:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:38,072 INFO L495 AbstractCegarLoop]: Abstraction has 5533 states and 7790 transitions. [2022-11-21 13:56:38,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.5) internal successors, (207), 6 states have internal predecessors, (207), 4 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (67), 4 states have call predecessors, (67), 4 states have call successors, (67) [2022-11-21 13:56:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 7790 transitions. [2022-11-21 13:56:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-11-21 13:56:38,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:38,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:38,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:38,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:38,302 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:38,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash 158752915, now seen corresponding path program 2 times [2022-11-21 13:56:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:38,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264897225] [2022-11-21 13:56:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:38,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:38,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264897225] [2022-11-21 13:56:38,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192424495] [2022-11-21 13:56:38,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:56:38,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:38,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:38,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:38,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 13:56:40,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:56:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:56:40,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 2545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:56:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-11-21 13:56:40,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:40,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192424495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:40,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:40,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:40,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498084971] [2022-11-21 13:56:40,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:40,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:40,317 INFO L87 Difference]: Start difference. First operand 5533 states and 7790 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-21 13:56:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:40,884 INFO L93 Difference]: Finished difference Result 16499 states and 23281 transitions. [2022-11-21 13:56:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 451 [2022-11-21 13:56:40,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:40,965 INFO L225 Difference]: With dead ends: 16499 [2022-11-21 13:56:40,965 INFO L226 Difference]: Without dead ends: 10993 [2022-11-21 13:56:41,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:41,002 INFO L413 NwaCegarLoop]: 3785 mSDtfsCounter, 3117 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3117 SdHoareTripleChecker+Valid, 6918 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:41,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3117 Valid, 6918 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:56:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10993 states. [2022-11-21 13:56:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10993 to 10990. [2022-11-21 13:56:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10990 states, 7586 states have (on average 1.2660163459003428) internal successors, (9604), 7767 states have internal predecessors, (9604), 2935 states have call successors, (2935), 466 states have call predecessors, (2935), 468 states have return successors, (2954), 2870 states have call predecessors, (2954), 2934 states have call successors, (2954) [2022-11-21 13:56:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10990 states to 10990 states and 15493 transitions. [2022-11-21 13:56:41,554 INFO L78 Accepts]: Start accepts. Automaton has 10990 states and 15493 transitions. Word has length 451 [2022-11-21 13:56:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:41,555 INFO L495 AbstractCegarLoop]: Abstraction has 10990 states and 15493 transitions. [2022-11-21 13:56:41,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-21 13:56:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 10990 states and 15493 transitions. [2022-11-21 13:56:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-11-21 13:56:41,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:41,579 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:41,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:41,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:41,791 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash -823277907, now seen corresponding path program 1 times [2022-11-21 13:56:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:41,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550774730] [2022-11-21 13:56:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:41,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:42,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550774730] [2022-11-21 13:56:42,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007494469] [2022-11-21 13:56:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:42,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:42,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:42,051 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:42,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 13:56:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 4790 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:56:43,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-21 13:56:43,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-11-21 13:56:44,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007494469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:44,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:44,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-21 13:56:44,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494813818] [2022-11-21 13:56:44,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:44,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:56:44,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:56:44,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:56:44,613 INFO L87 Difference]: Start difference. First operand 10990 states and 15493 transitions. Second operand has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 10 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (73), 10 states have call predecessors, (73), 10 states have call successors, (73) [2022-11-21 13:56:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:45,046 INFO L93 Difference]: Finished difference Result 22049 states and 31190 transitions. [2022-11-21 13:56:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:56:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 10 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (73), 10 states have call predecessors, (73), 10 states have call successors, (73) Word has length 452 [2022-11-21 13:56:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:45,103 INFO L225 Difference]: With dead ends: 22049 [2022-11-21 13:56:45,103 INFO L226 Difference]: Without dead ends: 11086 [2022-11-21 13:56:45,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:56:45,156 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 30 mSDsluCounter, 9498 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 12674 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:45,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 12674 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:56:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2022-11-21 13:56:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 11086. [2022-11-21 13:56:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11086 states, 7658 states have (on average 1.2635152781405066) internal successors, (9676), 7839 states have internal predecessors, (9676), 2959 states have call successors, (2959), 466 states have call predecessors, (2959), 468 states have return successors, (2978), 2894 states have call predecessors, (2978), 2958 states have call successors, (2978) [2022-11-21 13:56:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11086 states to 11086 states and 15613 transitions. [2022-11-21 13:56:45,630 INFO L78 Accepts]: Start accepts. Automaton has 11086 states and 15613 transitions. Word has length 452 [2022-11-21 13:56:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:45,631 INFO L495 AbstractCegarLoop]: Abstraction has 11086 states and 15613 transitions. [2022-11-21 13:56:45,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 10 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (73), 10 states have call predecessors, (73), 10 states have call successors, (73) [2022-11-21 13:56:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 11086 states and 15613 transitions. [2022-11-21 13:56:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-11-21 13:56:45,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:45,658 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:45,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 13:56:45,875 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1482210797, now seen corresponding path program 2 times [2022-11-21 13:56:45,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:45,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357525015] [2022-11-21 13:56:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:45,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:46,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357525015] [2022-11-21 13:56:46,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:46,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239957574] [2022-11-21 13:56:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:56:46,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:46,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:46,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 13:56:47,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:56:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:56:47,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:56:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-11-21 13:56:47,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:47,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239957574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:47,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:47,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:47,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889523372] [2022-11-21 13:56:47,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:47,797 INFO L87 Difference]: Start difference. First operand 11086 states and 15613 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-21 13:56:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:48,336 INFO L93 Difference]: Finished difference Result 27683 states and 39030 transitions. [2022-11-21 13:56:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 494 [2022-11-21 13:56:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:48,422 INFO L225 Difference]: With dead ends: 27683 [2022-11-21 13:56:48,422 INFO L226 Difference]: Without dead ends: 16624 [2022-11-21 13:56:48,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:48,483 INFO L413 NwaCegarLoop]: 3767 mSDtfsCounter, 3143 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3143 SdHoareTripleChecker+Valid, 6900 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:48,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3143 Valid, 6900 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:56:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16624 states. [2022-11-21 13:56:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16624 to 16621. [2022-11-21 13:56:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16621 states, 11486 states have (on average 1.2628417203552151) internal successors, (14505), 11755 states have internal predecessors, (14505), 4430 states have call successors, (4430), 698 states have call predecessors, (4430), 704 states have return successors, (4473), 4338 states have call predecessors, (4473), 4429 states have call successors, (4473) [2022-11-21 13:56:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16621 states to 16621 states and 23408 transitions. [2022-11-21 13:56:49,213 INFO L78 Accepts]: Start accepts. Automaton has 16621 states and 23408 transitions. Word has length 494 [2022-11-21 13:56:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:49,214 INFO L495 AbstractCegarLoop]: Abstraction has 16621 states and 23408 transitions. [2022-11-21 13:56:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-21 13:56:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 16621 states and 23408 transitions. [2022-11-21 13:56:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-11-21 13:56:49,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:49,363 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:49,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:49,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:56:49,575 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash -893741014, now seen corresponding path program 1 times [2022-11-21 13:56:49,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:49,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168354889] [2022-11-21 13:56:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:49,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:49,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168354889] [2022-11-21 13:56:49,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582773110] [2022-11-21 13:56:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:49,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:49,843 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:49,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 13:56:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 5020 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:56:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 9 proven. 190 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2022-11-21 13:56:51,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-11-21 13:56:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582773110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:52,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:52,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-21 13:56:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487435735] [2022-11-21 13:56:52,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:52,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:56:52,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:56:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:56:52,567 INFO L87 Difference]: Start difference. First operand 16621 states and 23408 transitions. Second operand has 24 states, 24 states have (on average 10.958333333333334) internal successors, (263), 24 states have internal predecessors, (263), 22 states have call successors, (91), 2 states have call predecessors, (91), 2 states have return successors, (85), 22 states have call predecessors, (85), 22 states have call successors, (85) [2022-11-21 13:56:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:53,296 INFO L93 Difference]: Finished difference Result 33503 states and 47351 transitions. [2022-11-21 13:56:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:56:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.958333333333334) internal successors, (263), 24 states have internal predecessors, (263), 22 states have call successors, (91), 2 states have call predecessors, (91), 2 states have return successors, (85), 22 states have call predecessors, (85), 22 states have call successors, (85) Word has length 495 [2022-11-21 13:56:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:53,531 INFO L225 Difference]: With dead ends: 33503 [2022-11-21 13:56:53,531 INFO L226 Difference]: Without dead ends: 16909 [2022-11-21 13:56:53,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 966 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:56:53,598 INFO L413 NwaCegarLoop]: 3188 mSDtfsCounter, 66 mSDsluCounter, 15836 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 19024 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:53,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 19024 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:56:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16909 states. [2022-11-21 13:56:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16909 to 16909. [2022-11-21 13:56:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16909 states, 11702 states have (on average 1.2579900871645873) internal successors, (14721), 11971 states have internal predecessors, (14721), 4502 states have call successors, (4502), 698 states have call predecessors, (4502), 704 states have return successors, (4545), 4410 states have call predecessors, (4545), 4501 states have call successors, (4545) [2022-11-21 13:56:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16909 states to 16909 states and 23768 transitions. [2022-11-21 13:56:54,418 INFO L78 Accepts]: Start accepts. Automaton has 16909 states and 23768 transitions. Word has length 495 [2022-11-21 13:56:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:54,418 INFO L495 AbstractCegarLoop]: Abstraction has 16909 states and 23768 transitions. [2022-11-21 13:56:54,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.958333333333334) internal successors, (263), 24 states have internal predecessors, (263), 22 states have call successors, (91), 2 states have call predecessors, (91), 2 states have return successors, (85), 22 states have call predecessors, (85), 22 states have call successors, (85) [2022-11-21 13:56:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16909 states and 23768 transitions. [2022-11-21 13:56:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-11-21 13:56:54,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:54,450 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:54,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:54,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:54,651 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2128712150, now seen corresponding path program 2 times [2022-11-21 13:56:54,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:54,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320553253] [2022-11-21 13:56:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:54,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:54,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320553253] [2022-11-21 13:56:54,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:56:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868750958] [2022-11-21 13:56:54,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:56:54,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:54,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:54,970 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:54,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 13:56:56,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:56:56,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:56:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:56:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1990 trivial. 0 not checked. [2022-11-21 13:56:56,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:56,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868750958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:56,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:56,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:56:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94390154] [2022-11-21 13:56:56,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:56,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:56:56,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:56:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:56,782 INFO L87 Difference]: Start difference. First operand 16909 states and 23768 transitions. Second operand has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-21 13:57:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:03,271 INFO L93 Difference]: Finished difference Result 45113 states and 64332 transitions. [2022-11-21 13:57:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:57:03,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 579 [2022-11-21 13:57:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:03,397 INFO L225 Difference]: With dead ends: 45113 [2022-11-21 13:57:03,397 INFO L226 Difference]: Without dead ends: 28231 [2022-11-21 13:57:03,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:03,451 INFO L413 NwaCegarLoop]: 5130 mSDtfsCounter, 4763 mSDsluCounter, 7970 mSDsCounter, 0 mSdLazyCounter, 3713 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5070 SdHoareTripleChecker+Valid, 13100 SdHoareTripleChecker+Invalid, 3800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:03,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5070 Valid, 13100 Invalid, 3800 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [87 Valid, 3713 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-21 13:57:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28231 states. [2022-11-21 13:57:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28231 to 22536. [2022-11-21 13:57:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22536 states, 15601 states have (on average 1.2575475931030062) internal successors, (19619), 15958 states have internal predecessors, (19619), 5994 states have call successors, (5994), 930 states have call predecessors, (5994), 940 states have return successors, (6061), 5875 states have call predecessors, (6061), 5993 states have call successors, (6061) [2022-11-21 13:57:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 31674 transitions. [2022-11-21 13:57:04,417 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 31674 transitions. Word has length 579 [2022-11-21 13:57:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:04,417 INFO L495 AbstractCegarLoop]: Abstraction has 22536 states and 31674 transitions. [2022-11-21 13:57:04,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-21 13:57:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 31674 transitions. [2022-11-21 13:57:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2022-11-21 13:57:04,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:04,456 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:04,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:04,657 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1370920740, now seen corresponding path program 1 times [2022-11-21 13:57:04,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:04,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189681639] [2022-11-21 13:57:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:04,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189681639] [2022-11-21 13:57:04,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:57:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838406328] [2022-11-21 13:57:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:04,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:04,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:04,979 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:04,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 13:57:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 5478 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 13:57:07,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 9 proven. 946 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-21 13:57:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2022-11-21 13:57:09,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838406328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:09,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:57:09,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-11-21 13:57:09,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222260756] [2022-11-21 13:57:09,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:09,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 13:57:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 13:57:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 13:57:09,124 INFO L87 Difference]: Start difference. First operand 22536 states and 31674 transitions. Second operand has 48 states, 48 states have (on average 7.0) internal successors, (336), 48 states have internal predecessors, (336), 46 states have call successors, (115), 2 states have call predecessors, (115), 2 states have return successors, (109), 46 states have call predecessors, (109), 46 states have call successors, (109) [2022-11-21 13:57:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:10,887 INFO L93 Difference]: Finished difference Result 45813 states and 64643 transitions. [2022-11-21 13:57:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-21 13:57:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 7.0) internal successors, (336), 48 states have internal predecessors, (336), 46 states have call successors, (115), 2 states have call predecessors, (115), 2 states have return successors, (109), 46 states have call predecessors, (109), 46 states have call successors, (109) Word has length 580 [2022-11-21 13:57:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:11,012 INFO L225 Difference]: With dead ends: 45813 [2022-11-21 13:57:11,012 INFO L226 Difference]: Without dead ends: 23304 [2022-11-21 13:57:11,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1112 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 13:57:11,102 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 92 mSDsluCounter, 19023 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 22235 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:11,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 22235 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:57:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23304 states. [2022-11-21 13:57:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23304 to 23304. [2022-11-21 13:57:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23304 states, 16177 states have (on average 1.2483773258329727) internal successors, (20195), 16534 states have internal predecessors, (20195), 6186 states have call successors, (6186), 930 states have call predecessors, (6186), 940 states have return successors, (6253), 6067 states have call predecessors, (6253), 6185 states have call successors, (6253) [2022-11-21 13:57:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23304 states to 23304 states and 32634 transitions. [2022-11-21 13:57:12,245 INFO L78 Accepts]: Start accepts. Automaton has 23304 states and 32634 transitions. Word has length 580 [2022-11-21 13:57:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:12,249 INFO L495 AbstractCegarLoop]: Abstraction has 23304 states and 32634 transitions. [2022-11-21 13:57:12,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 7.0) internal successors, (336), 48 states have internal predecessors, (336), 46 states have call successors, (115), 2 states have call predecessors, (115), 2 states have return successors, (109), 46 states have call predecessors, (109), 46 states have call successors, (109) [2022-11-21 13:57:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 23304 states and 32634 transitions. [2022-11-21 13:57:12,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-21 13:57:12,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:12,305 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:12,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:12,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:12,520 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2145520240, now seen corresponding path program 1 times [2022-11-21 13:57:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:12,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338421045] [2022-11-21 13:57:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:12,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:12,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338421045] [2022-11-21 13:57:12,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:57:12,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556643623] [2022-11-21 13:57:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:12,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:12,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:12,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:12,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 13:57:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 5961 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:57:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2022-11-21 13:57:15,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:15,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556643623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:15,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:15,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:15,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671702445] [2022-11-21 13:57:15,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:15,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:15,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:15,433 INFO L87 Difference]: Start difference. First operand 23304 states and 32634 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 2 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2022-11-21 13:57:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:17,109 INFO L93 Difference]: Finished difference Result 67684 states and 94872 transitions. [2022-11-21 13:57:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 2 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) Word has length 524 [2022-11-21 13:57:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:17,340 INFO L225 Difference]: With dead ends: 67684 [2022-11-21 13:57:17,340 INFO L226 Difference]: Without dead ends: 44407 [2022-11-21 13:57:17,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:17,461 INFO L413 NwaCegarLoop]: 4484 mSDtfsCounter, 2703 mSDsluCounter, 3122 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2703 SdHoareTripleChecker+Valid, 7606 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:17,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2703 Valid, 7606 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44407 states. [2022-11-21 13:57:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44407 to 44396. [2022-11-21 13:57:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44396 states, 30856 states have (on average 1.2492870106300233) internal successors, (38548), 31494 states have internal predecessors, (38548), 11778 states have call successors, (11778), 1740 states have call predecessors, (11778), 1761 states have return successors, (11913), 11585 states have call predecessors, (11913), 11777 states have call successors, (11913) [2022-11-21 13:57:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44396 states to 44396 states and 62239 transitions. [2022-11-21 13:57:19,883 INFO L78 Accepts]: Start accepts. Automaton has 44396 states and 62239 transitions. Word has length 524 [2022-11-21 13:57:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:19,883 INFO L495 AbstractCegarLoop]: Abstraction has 44396 states and 62239 transitions. [2022-11-21 13:57:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 2 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2022-11-21 13:57:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44396 states and 62239 transitions. [2022-11-21 13:57:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-11-21 13:57:20,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:20,265 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:20,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:20,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 13:57:20,467 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1682401491, now seen corresponding path program 1 times [2022-11-21 13:57:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495031857] [2022-11-21 13:57:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:20,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495031857] [2022-11-21 13:57:20,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:57:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610397227] [2022-11-21 13:57:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:20,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:20,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:20,986 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:21,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 13:57:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 6137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:57:23,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-11-21 13:57:23,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610397227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:23,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:23,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:23,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588573052] [2022-11-21 13:57:23,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:23,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:23,752 INFO L87 Difference]: Start difference. First operand 44396 states and 62239 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2022-11-21 13:57:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:26,496 INFO L93 Difference]: Finished difference Result 110352 states and 154747 transitions. [2022-11-21 13:57:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:26,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) Word has length 559 [2022-11-21 13:57:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:26,937 INFO L225 Difference]: With dead ends: 110352 [2022-11-21 13:57:26,937 INFO L226 Difference]: Without dead ends: 65993 [2022-11-21 13:57:27,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:27,146 INFO L413 NwaCegarLoop]: 4220 mSDtfsCounter, 2841 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2841 SdHoareTripleChecker+Valid, 7133 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:27,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2841 Valid, 7133 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65993 states. [2022-11-21 13:57:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65993 to 65890. [2022-11-21 13:57:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65890 states, 45814 states have (on average 1.2490505085781638) internal successors, (57224), 46762 states have internal predecessors, (57224), 17460 states have call successors, (17460), 2584 states have call predecessors, (17460), 2615 states have return successors, (17659), 17167 states have call predecessors, (17659), 17459 states have call successors, (17659) [2022-11-21 13:57:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65890 states to 65890 states and 92343 transitions. [2022-11-21 13:57:30,888 INFO L78 Accepts]: Start accepts. Automaton has 65890 states and 92343 transitions. Word has length 559 [2022-11-21 13:57:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:30,890 INFO L495 AbstractCegarLoop]: Abstraction has 65890 states and 92343 transitions. [2022-11-21 13:57:30,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2022-11-21 13:57:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 65890 states and 92343 transitions. [2022-11-21 13:57:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-11-21 13:57:31,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:31,066 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:31,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:31,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:31,290 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1120741214, now seen corresponding path program 1 times [2022-11-21 13:57:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:31,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713484638] [2022-11-21 13:57:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:31,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713484638] [2022-11-21 13:57:31,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:57:31,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670623120] [2022-11-21 13:57:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:31,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:31,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:31,883 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:31,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 13:57:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 6182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:57:34,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-21 13:57:34,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670623120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:34,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:34,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685056017] [2022-11-21 13:57:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:34,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:34,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:34,418 INFO L87 Difference]: Start difference. First operand 65890 states and 92343 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 2 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2022-11-21 13:57:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:37,974 INFO L93 Difference]: Finished difference Result 131755 states and 184653 transitions. [2022-11-21 13:57:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 2 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) Word has length 575 [2022-11-21 13:57:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:38,352 INFO L225 Difference]: With dead ends: 131755 [2022-11-21 13:57:38,352 INFO L226 Difference]: Without dead ends: 65890 [2022-11-21 13:57:38,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:38,909 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 0 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6333 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:38,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6333 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65890 states. [2022-11-21 13:57:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65890 to 65890. [2022-11-21 13:57:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65890 states, 45814 states have (on average 1.248788579910071) internal successors, (57212), 46762 states have internal predecessors, (57212), 17460 states have call successors, (17460), 2584 states have call predecessors, (17460), 2615 states have return successors, (17659), 17167 states have call predecessors, (17659), 17459 states have call successors, (17659) [2022-11-21 13:57:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65890 states to 65890 states and 92331 transitions. [2022-11-21 13:57:42,435 INFO L78 Accepts]: Start accepts. Automaton has 65890 states and 92331 transitions. Word has length 575 [2022-11-21 13:57:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:42,436 INFO L495 AbstractCegarLoop]: Abstraction has 65890 states and 92331 transitions. [2022-11-21 13:57:42,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 2 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2022-11-21 13:57:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 65890 states and 92331 transitions. [2022-11-21 13:57:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2022-11-21 13:57:42,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:42,593 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:42,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:42,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:42,794 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 585302394, now seen corresponding path program 1 times [2022-11-21 13:57:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:42,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970272562] [2022-11-21 13:57:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:43,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970272562] [2022-11-21 13:57:43,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 13:57:43,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271427178] [2022-11-21 13:57:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:43,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:43,257 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c82a6f-5ba4-4134-8665-c30f9a9c278c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-21 13:57:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 6260 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:57:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-21 13:57:46,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:46,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271427178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:46,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:46,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:46,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055123247] [2022-11-21 13:57:46,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:46,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:46,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:46,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:46,219 INFO L87 Difference]: Start difference. First operand 65890 states and 92331 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68)