./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 5e519f3a 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_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/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_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc --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-5e519f3 [2022-11-02 20:40:55,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:40:55,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:40:55,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:40:55,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:40:55,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:40:55,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:40:55,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:40:55,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:40:55,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:40:55,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:40:55,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:40:55,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:40:55,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:40:55,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:40:55,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:40:55,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:40:55,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:40:55,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:40:55,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:40:55,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:40:55,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:40:55,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:40:55,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:40:55,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:40:55,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:40:55,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:40:55,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:40:55,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:40:55,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:40:55,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:40:55,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:40:55,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:40:55,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:40:55,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:40:55,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:40:55,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:40:55,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:40:55,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:40:55,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:40:55,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:40:55,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:40:55,824 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:40:55,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:40:55,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:40:55,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:40:55,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:40:55,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:40:55,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:40:55,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:40:55,827 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:40:55,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:40:55,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:40:55,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:40:55,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:40:55,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:40:55,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:40:55,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:40:55,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:40:55,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:40:55,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:40:55,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:40:55,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:40:55,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:40:55,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:40:55,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:40:55,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:40:55,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:40:55,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:40:55,833 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:40:55,833 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:40:55,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:40:55,834 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_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdcb32e90fffda272ef4414cda96d9fa59a53e22555da4af86a588968a9c4dd7 [2022-11-02 20:40:56,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:40:56,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:40:56,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:40:56,244 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:40:56,245 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:40:56,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/../../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 [2022-11-02 20:40:56,336 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/data/794251216/85d4c545aeaf449fb147961eb9611e0e/FLAGdbc21fba6 [2022-11-02 20:40:57,482 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:40:57,484 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/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 [2022-11-02 20:40:57,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/data/794251216/85d4c545aeaf449fb147961eb9611e0e/FLAGdbc21fba6 [2022-11-02 20:40:57,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/data/794251216/85d4c545aeaf449fb147961eb9611e0e [2022-11-02 20:40:57,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:40:57,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:40:57,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:40:57,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:40:57,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:40:57,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:57" (1/1) ... [2022-11-02 20:40:57,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f84002f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:57, skipping insertion in model container [2022-11-02 20:40:57,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:57" (1/1) ... [2022-11-02 20:40:57,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:40:58,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:41:01,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/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] [2022-11-02 20:41:01,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:41:01,193 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:41:01,772 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/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] [2022-11-02 20:41:01,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:41:02,043 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:41:02,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02 WrapperNode [2022-11-02 20:41:02,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:41:02,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:41:02,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:41:02,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:41:02,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,472 INFO L138 Inliner]: procedures = 409, calls = 2551, calls flagged for inlining = 208, calls inlined = 189, statements flattened = 5753 [2022-11-02 20:41:02,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:41:02,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:41:02,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:41:02,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:41:02,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,888 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:41:02,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:41:02,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:41:02,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:41:02,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (1/1) ... [2022-11-02 20:41:02,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:41:03,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:03,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:41:03,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:41:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_link_speed [2022-11-02 20:41:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_link_speed [2022-11-02 20:41:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-02 20:41:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-02 20:41:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-02 20:41:03,084 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-02 20:41:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-02 20:41:03,084 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-02 20:41:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure ql_link_state_machine_work [2022-11-02 20:41:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_link_state_machine_work [2022-11-02 20:41:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2022-11-02 20:41:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2022-11-02 20:41:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-02 20:41:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-02 20:41:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 20:41:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 20:41:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2022-11-02 20:41:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2022-11-02 20:41:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-02 20:41:03,087 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-02 20:41:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure ql_this_adapter_controls_port [2022-11-02 20:41:03,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_this_adapter_controls_port [2022-11-02 20:41:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_3 [2022-11-02 20:41:03,088 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_3 [2022-11-02 20:41:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure ql_enable_interrupts [2022-11-02 20:41:03,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_enable_interrupts [2022-11-02 20:41:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-02 20:41:03,088 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-02 20:41:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-02 20:41:03,089 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-02 20:41:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg_l [2022-11-02 20:41:03,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg_l [2022-11-02 20:41:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_send_free_list [2022-11-02 20:41:03,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_send_free_list [2022-11-02 20:41:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-02 20:41:03,090 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-02 20:41:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-02 20:41:03,091 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-02 20:41:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure ssleep [2022-11-02 20:41:03,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ssleep [2022-11-02 20:41:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_set_mac_address [2022-11-02 20:41:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_set_mac_address [2022-11-02 20:41:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cycle_adapter [2022-11-02 20:41:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cycle_adapter [2022-11-02 20:41:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mac_cfg_soft_reset [2022-11-02 20:41:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mac_cfg_soft_reset [2022-11-02 20:41:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-02 20:41:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-02 20:41:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-02 20:41:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-02 20:41:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-02 20:41:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-02 20:41:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_disable_scan_mode [2022-11-02 20:41:03,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_disable_scan_mode [2022-11-02 20:41:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-02 20:41:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-02 20:41:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-02 20:41:03,095 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-02 20:41:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:41:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-02 20:41:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-02 20:41:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg_l [2022-11-02 20:41:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg_l [2022-11-02 20:41:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_up [2022-11-02 20:41:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_up [2022-11-02 20:41:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-02 20:41:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-02 20:41:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-02 20:41:03,098 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-02 20:41:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_consistent_dma_mask [2022-11-02 20:41:03,098 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_consistent_dma_mask [2022-11-02 20:41:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-02 20:41:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-02 20:41:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-02 20:41:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-02 20:41:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-02 20:41:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-02 20:41:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_5 [2022-11-02 20:41:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_5 [2022-11-02 20:41:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page1_reg [2022-11-02 20:41:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page1_reg [2022-11-02 20:41:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:41:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-02 20:41:03,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-02 20:41:03,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-02 20:41:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-02 20:41:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-02 20:41:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-02 20:41:03,102 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2022-11-02 20:41:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2022-11-02 20:41:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2022-11-02 20:41:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2022-11-02 20:41:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_register_page [2022-11-02 20:41:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_register_page [2022-11-02 20:41:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-02 20:41:03,104 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-02 20:41:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg_ex [2022-11-02 20:41:03,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg_ex [2022-11-02 20:41:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure ql_phy_init_ex [2022-11-02 20:41:03,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_phy_init_ex [2022-11-02 20:41:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-02 20:41:03,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-02 20:41:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg_l [2022-11-02 20:41:03,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg_l [2022-11-02 20:41:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg [2022-11-02 20:41:03,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg [2022-11-02 20:41:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:41:03,106 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_spinlock [2022-11-02 20:41:03,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_spinlock [2022-11-02 20:41:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page2_reg [2022-11-02 20:41:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page2_reg [2022-11-02 20:41:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:41:03,107 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_5 [2022-11-02 20:41:03,107 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_5 [2022-11-02 20:41:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg [2022-11-02 20:41:03,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg [2022-11-02 20:41:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-02 20:41:03,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-02 20:41:03,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:41:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg [2022-11-02 20:41:03,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg [2022-11-02 20:41:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_unlock [2022-11-02 20:41:03,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_unlock [2022-11-02 20:41:03,109 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-02 20:41:03,110 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-02 20:41:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_nvram_reg [2022-11-02 20:41:03,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_nvram_reg [2022-11-02 20:41:03,111 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-02 20:41:03,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-02 20:41:03,111 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2022-11-02 20:41:03,111 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2022-11-02 20:41:03,112 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_drvr_lock [2022-11-02 20:41:03,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_drvr_lock [2022-11-02 20:41:03,112 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2022-11-02 20:41:03,112 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2022-11-02 20:41:03,112 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_enable_scan_mode [2022-11-02 20:41:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_enable_scan_mode [2022-11-02 20:41:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2022-11-02 20:41:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2022-11-02 20:41:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure ql_tx_timeout_work [2022-11-02 20:41:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_tx_timeout_work [2022-11-02 20:41:03,114 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-02 20:41:03,114 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-02 20:41:03,114 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-02 20:41:03,114 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-02 20:41:03,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:41:03,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:41:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_mii_ready [2022-11-02 20:41:03,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_mii_ready [2022-11-02 20:41:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-02 20:41:03,115 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-02 20:41:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_large_buffers [2022-11-02 20:41:03,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_large_buffers [2022-11-02 20:41:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-02 20:41:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-02 20:41:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-02 20:41:03,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-02 20:41:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-02 20:41:03,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-02 20:41:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-02 20:41:03,117 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-02 20:41:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_interrupts [2022-11-02 20:41:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_interrupts [2022-11-02 20:41:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-11-02 20:41:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-11-02 20:41:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2022-11-02 20:41:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2022-11-02 20:41:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg [2022-11-02 20:41:03,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg [2022-11-02 20:41:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-02 20:41:03,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-02 20:41:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2022-11-02 20:41:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2022-11-02 20:41:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-02 20:41:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-02 20:41:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure PHY_Setup [2022-11-02 20:41:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure PHY_Setup [2022-11-02 20:41:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-02 20:41:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-02 20:41:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_buffer_queues [2022-11-02 20:41:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_buffer_queues [2022-11-02 20:41:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:41:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:41:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-02 20:41:03,122 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-02 20:41:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-02 20:41:03,122 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-02 20:41:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2022-11-02 20:41:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2022-11-02 20:41:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-02 20:41:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-02 20:41:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:41:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-02 20:41:03,124 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-02 20:41:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:41:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-02 20:41:03,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-02 20:41:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_3 [2022-11-02 20:41:03,125 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_3 [2022-11-02 20:41:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:41:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_3 [2022-11-02 20:41:03,125 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_3 [2022-11-02 20:41:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2022-11-02 20:41:03,126 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2022-11-02 20:41:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-02 20:41:03,126 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-02 20:41:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-02 20:41:03,126 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-02 20:41:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page0_reg [2022-11-02 20:41:03,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page0_reg [2022-11-02 20:41:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-02 20:41:03,127 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-02 20:41:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_link_full_dup [2022-11-02 20:41:03,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_link_full_dup [2022-11-02 20:41:03,128 INFO L130 BoogieDeclarations]: Found specification of procedure ql_reset_work [2022-11-02 20:41:03,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_reset_work [2022-11-02 20:41:03,128 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-02 20:41:03,128 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-02 20:41:03,128 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_tx_timeout [2022-11-02 20:41:03,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_tx_timeout [2022-11-02 20:41:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure ql_supported_modes [2022-11-02 20:41:03,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_supported_modes [2022-11-02 20:41:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2022-11-02 20:41:03,129 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2022-11-02 20:41:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-02 20:41:03,130 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-02 20:41:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_fiber [2022-11-02 20:41:03,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_fiber [2022-11-02 20:41:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2022-11-02 20:41:03,130 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2022-11-02 20:41:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-02 20:41:03,131 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-02 20:41:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_net_req_rsp_queues [2022-11-02 20:41:03,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_net_req_rsp_queues [2022-11-02 20:41:03,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:41:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2022-11-02 20:41:03,132 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2022-11-02 20:41:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-02 20:41:03,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-02 20:41:03,132 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg_ex [2022-11-02 20:41:03,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg_ex [2022-11-02 20:41:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_down [2022-11-02 20:41:03,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_down [2022-11-02 20:41:03,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-02 20:41:03,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-02 20:41:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure ql_port_start [2022-11-02 20:41:03,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_port_start [2022-11-02 20:41:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-02 20:41:03,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-02 20:41:03,134 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2022-11-02 20:41:03,135 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2022-11-02 20:41:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_auto_cfg_status [2022-11-02 20:41:03,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_auto_cfg_status [2022-11-02 20:41:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg [2022-11-02 20:41:03,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg [2022-11-02 20:41:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_3 [2022-11-02 20:41:03,136 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_3 [2022-11-02 20:41:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-02 20:41:03,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-02 20:41:03,136 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-02 20:41:03,137 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-02 20:41:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2022-11-02 20:41:03,137 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2022-11-02 20:41:03,137 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-02 20:41:03,137 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-02 20:41:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2022-11-02 20:41:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:41:03,138 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr [2022-11-02 20:41:03,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr [2022-11-02 20:41:04,229 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:41:04,238 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:41:04,554 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-02 20:41:11,053 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:41:11,118 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:41:11,119 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 20:41:11,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:11 BoogieIcfgContainer [2022-11-02 20:41:11,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:41:11,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:41:11,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:41:11,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:41:11,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:40:57" (1/3) ... [2022-11-02 20:41:11,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43862c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:11, skipping insertion in model container [2022-11-02 20:41:11,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:02" (2/3) ... [2022-11-02 20:41:11,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43862c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:11, skipping insertion in model container [2022-11-02 20:41:11,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:11" (3/3) ... [2022-11-02 20:41:11,143 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i [2022-11-02 20:41:11,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:41:11,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:41:11,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:41:11,287 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;@552d8a1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:41:11,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:41:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 2286 states, 1533 states have (on average 1.3052837573385518) internal successors, (2001), 1589 states have internal predecessors, (2001), 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) [2022-11-02 20:41:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-02 20:41:11,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:11,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:11,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1778786021, now seen corresponding path program 1 times [2022-11-02 20:41:11,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:11,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314572999] [2022-11-02 20:41:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314572999] [2022-11-02 20:41:12,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353856842] [2022-11-02 20:41:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:12,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:12,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:12,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:12,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:41:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:13,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 3315 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:41:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-02 20:41:13,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:13,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353856842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:13,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:13,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:41:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131179604] [2022-11-02 20:41:13,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:13,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:41:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:41:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:41:13,684 INFO L87 Difference]: Start difference. First operand has 2286 states, 1533 states have (on average 1.3052837573385518) internal successors, (2001), 1589 states have internal predecessors, (2001), 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 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-02 20:41:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:14,057 INFO L93 Difference]: Finished difference Result 4567 states and 6529 transitions. [2022-11-02 20:41:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:41:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 211 [2022-11-02 20:41:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:14,112 INFO L225 Difference]: With dead ends: 4567 [2022-11-02 20:41:14,113 INFO L226 Difference]: Without dead ends: 2260 [2022-11-02 20:41:14,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:41:14,148 INFO L413 NwaCegarLoop]: 3239 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, 3239 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 [2022-11-02 20:41:14,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-11-02 20:41:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-11-02 20:41:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1519 states have (on average 1.2955892034233047) internal successors, (1968), 1563 states have internal predecessors, (1968), 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) [2022-11-02 20:41:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3199 transitions. [2022-11-02 20:41:14,417 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3199 transitions. Word has length 211 [2022-11-02 20:41:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:14,418 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3199 transitions. [2022-11-02 20:41:14,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-02 20:41:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3199 transitions. [2022-11-02 20:41:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-02 20:41:14,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:14,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:14,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:14,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:41:14,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash -249045671, now seen corresponding path program 1 times [2022-11-02 20:41:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:14,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646179628] [2022-11-02 20:41:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:14,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:14,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697242250] [2022-11-02 20:41:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:14,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:14,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:41:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:16,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 3315 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:41:16,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-11-02 20:41:16,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:16,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:16,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646179628] [2022-11-02 20:41:16,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:16,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697242250] [2022-11-02 20:41:16,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697242250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:16,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:16,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217506896] [2022-11-02 20:41:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:16,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:16,367 INFO L87 Difference]: Start difference. First operand 2260 states and 3199 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-11-02 20:41:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:16,926 INFO L93 Difference]: Finished difference Result 6408 states and 9080 transitions. [2022-11-02 20:41:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 211 [2022-11-02 20:41:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:16,978 INFO L225 Difference]: With dead ends: 6408 [2022-11-02 20:41:16,979 INFO L226 Difference]: Without dead ends: 4175 [2022-11-02 20:41:16,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:17,001 INFO L413 NwaCegarLoop]: 3696 mSDtfsCounter, 2808 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2808 SdHoareTripleChecker+Valid, 6718 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 [2022-11-02 20:41:17,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2808 Valid, 6718 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2022-11-02 20:41:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 4159. [2022-11-02 20:41:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4159 states, 2796 states have (on average 1.2950643776824033) internal successors, (3621), 2882 states have internal predecessors, (3621), 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) [2022-11-02 20:41:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4159 states to 4159 states and 5882 transitions. [2022-11-02 20:41:17,341 INFO L78 Accepts]: Start accepts. Automaton has 4159 states and 5882 transitions. Word has length 211 [2022-11-02 20:41:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:17,343 INFO L495 AbstractCegarLoop]: Abstraction has 4159 states and 5882 transitions. [2022-11-02 20:41:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-11-02 20:41:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4159 states and 5882 transitions. [2022-11-02 20:41:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-11-02 20:41:17,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:17,366 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, 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] [2022-11-02 20:41:17,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:17,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1725019993, now seen corresponding path program 1 times [2022-11-02 20:41:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:17,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947506239] [2022-11-02 20:41:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:17,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603882601] [2022-11-02 20:41:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:17,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:17,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:17,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:17,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:41:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 4088 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:41:19,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-02 20:41:19,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:19,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:19,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947506239] [2022-11-02 20:41:19,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:19,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603882601] [2022-11-02 20:41:19,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603882601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:19,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:19,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743197091] [2022-11-02 20:41:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:19,605 INFO L87 Difference]: Start difference. First operand 4159 states and 5882 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2022-11-02 20:41:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:19,818 INFO L93 Difference]: Finished difference Result 8299 states and 11782 transitions. [2022-11-02 20:41:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:19,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 332 [2022-11-02 20:41:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:19,853 INFO L225 Difference]: With dead ends: 8299 [2022-11-02 20:41:19,853 INFO L226 Difference]: Without dead ends: 4167 [2022-11-02 20:41:19,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:19,880 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 2 mSDsluCounter, 3195 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6393 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 [2022-11-02 20:41:19,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6393 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2022-11-02 20:41:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4161. [2022-11-02 20:41:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4161 states, 2798 states have (on average 1.2948534667619729) internal successors, (3623), 2884 states have internal predecessors, (3623), 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) [2022-11-02 20:41:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 5884 transitions. [2022-11-02 20:41:20,105 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 5884 transitions. Word has length 332 [2022-11-02 20:41:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:20,106 INFO L495 AbstractCegarLoop]: Abstraction has 4161 states and 5884 transitions. [2022-11-02 20:41:20,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2022-11-02 20:41:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 5884 transitions. [2022-11-02 20:41:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-02 20:41:20,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:20,125 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, 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] [2022-11-02 20:41:20,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:20,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:20,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1321397077, now seen corresponding path program 1 times [2022-11-02 20:41:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:20,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533733409] [2022-11-02 20:41:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:20,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:20,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:20,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035886596] [2022-11-02 20:41:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:20,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:20,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:41:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 4126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:41:22,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-02 20:41:22,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:22,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533733409] [2022-11-02 20:41:22,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035886596] [2022-11-02 20:41:22,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035886596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:22,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:22,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:41:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469171414] [2022-11-02 20:41:22,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:22,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:41:22,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:41:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:22,313 INFO L87 Difference]: Start difference. First operand 4161 states and 5884 transitions. Second operand has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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) [2022-11-02 20:41:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:22,763 INFO L93 Difference]: Finished difference Result 8377 states and 11885 transitions. [2022-11-02 20:41:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:41:22,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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 339 [2022-11-02 20:41:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:22,800 INFO L225 Difference]: With dead ends: 8377 [2022-11-02 20:41:22,800 INFO L226 Difference]: Without dead ends: 4243 [2022-11-02 20:41:22,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:41:22,827 INFO L413 NwaCegarLoop]: 3206 mSDtfsCounter, 101 mSDsluCounter, 12661 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 15867 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:22,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 15867 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2022-11-02 20:41:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 4243. [2022-11-02 20:41:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4243 states, 2846 states have (on average 1.2933942375263527) internal successors, (3681), 2932 states have internal predecessors, (3681), 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) [2022-11-02 20:41:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 6004 transitions. [2022-11-02 20:41:23,076 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 6004 transitions. Word has length 339 [2022-11-02 20:41:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:23,079 INFO L495 AbstractCegarLoop]: Abstraction has 4243 states and 6004 transitions. [2022-11-02 20:41:23,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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) [2022-11-02 20:41:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 6004 transitions. [2022-11-02 20:41:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-11-02 20:41:23,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:23,099 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, 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] [2022-11-02 20:41:23,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:23,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:23,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1125480365, now seen corresponding path program 1 times [2022-11-02 20:41:23,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:23,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356307030] [2022-11-02 20:41:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:23,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:23,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:23,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909390208] [2022-11-02 20:41:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:23,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:23,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:23,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:23,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:41:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 4274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:41:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-11-02 20:41:25,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:25,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356307030] [2022-11-02 20:41:25,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:25,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909390208] [2022-11-02 20:41:25,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909390208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:25,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:25,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:41:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087092395] [2022-11-02 20:41:25,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:25,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:41:25,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:41:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:41:25,293 INFO L87 Difference]: Start difference. First operand 4243 states and 6004 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (45), 3 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-02 20:41:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:25,535 INFO L93 Difference]: Finished difference Result 8569 states and 12188 transitions. [2022-11-02 20:41:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:41:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (45), 3 states have call predecessors, (45), 2 states have call successors, (45) Word has length 372 [2022-11-02 20:41:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:25,571 INFO L225 Difference]: With dead ends: 8569 [2022-11-02 20:41:25,571 INFO L226 Difference]: Without dead ends: 4353 [2022-11-02 20:41:25,597 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 [2022-11-02 20:41:25,598 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 42 mSDsluCounter, 9685 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 12927 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:25,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 12927 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2022-11-02 20:41:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 4251. [2022-11-02 20:41:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4251 states, 2852 states have (on average 1.2927769985974755) internal successors, (3687), 2938 states have internal predecessors, (3687), 1161 states have call successors, (1161), 234 states have call predecessors, (1161), 237 states have return successors, (1166), 1133 states have call predecessors, (1166), 1160 states have call successors, (1166) [2022-11-02 20:41:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4251 states to 4251 states and 6014 transitions. [2022-11-02 20:41:25,812 INFO L78 Accepts]: Start accepts. Automaton has 4251 states and 6014 transitions. Word has length 372 [2022-11-02 20:41:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:25,814 INFO L495 AbstractCegarLoop]: Abstraction has 4251 states and 6014 transitions. [2022-11-02 20:41:25,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (45), 3 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-02 20:41:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4251 states and 6014 transitions. [2022-11-02 20:41:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-11-02 20:41:25,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:25,833 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, 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] [2022-11-02 20:41:25,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:26,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:26,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash 271933102, now seen corresponding path program 1 times [2022-11-02 20:41:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:26,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769021183] [2022-11-02 20:41:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:26,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:26,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552427715] [2022-11-02 20:41:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:26,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:26,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:26,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:41:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 4294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:41:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-11-02 20:41:28,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:28,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:28,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769021183] [2022-11-02 20:41:28,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:28,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552427715] [2022-11-02 20:41:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552427715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:28,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:28,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:41:28,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425471878] [2022-11-02 20:41:28,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:28,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:41:28,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:41:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:41:28,058 INFO L87 Difference]: Start difference. First operand 4251 states and 6014 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2022-11-02 20:41:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:28,354 INFO L93 Difference]: Finished difference Result 8517 states and 12102 transitions. [2022-11-02 20:41:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:41:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 382 [2022-11-02 20:41:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:28,392 INFO L225 Difference]: With dead ends: 8517 [2022-11-02 20:41:28,392 INFO L226 Difference]: Without dead ends: 4293 [2022-11-02 20:41:28,418 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 [2022-11-02 20:41:28,420 INFO L413 NwaCegarLoop]: 3203 mSDtfsCounter, 13 mSDsluCounter, 6390 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9593 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 [2022-11-02 20:41:28,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9593 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-11-02 20:41:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4269. [2022-11-02 20:41:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4269 states, 2864 states have (on average 1.2922486033519553) internal successors, (3701), 2950 states have internal predecessors, (3701), 1167 states have call successors, (1167), 234 states have call predecessors, (1167), 237 states have return successors, (1172), 1139 states have call predecessors, (1172), 1166 states have call successors, (1172) [2022-11-02 20:41:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 6040 transitions. [2022-11-02 20:41:28,716 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 6040 transitions. Word has length 382 [2022-11-02 20:41:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:28,717 INFO L495 AbstractCegarLoop]: Abstraction has 4269 states and 6040 transitions. [2022-11-02 20:41:28,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2022-11-02 20:41:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 6040 transitions. [2022-11-02 20:41:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-11-02 20:41:28,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:28,737 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, 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] [2022-11-02 20:41:28,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:28,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:41:28,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash 312192907, now seen corresponding path program 1 times [2022-11-02 20:41:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049786084] [2022-11-02 20:41:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049786084] [2022-11-02 20:41:29,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037709479] [2022-11-02 20:41:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:29,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:29,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:29,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:29,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:41:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:30,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 4399 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:41:30,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-11-02 20:41:30,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:30,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037709479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:30,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:30,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777729155] [2022-11-02 20:41:30,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:30,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:30,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:30,963 INFO L87 Difference]: Start difference. First operand 4269 states and 6040 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-02 20:41:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:31,153 INFO L93 Difference]: Finished difference Result 8537 states and 12091 transitions. [2022-11-02 20:41:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:31,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 408 [2022-11-02 20:41:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:31,203 INFO L225 Difference]: With dead ends: 8537 [2022-11-02 20:41:31,203 INFO L226 Difference]: Without dead ends: 4295 [2022-11-02 20:41:31,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:31,225 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 11 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6392 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 [2022-11-02 20:41:31,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6392 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2022-11-02 20:41:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 4271. [2022-11-02 20:41:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 2866 states have (on average 1.2920446615491974) internal successors, (3703), 2952 states have internal predecessors, (3703), 1167 states have call successors, (1167), 234 states have call predecessors, (1167), 237 states have return successors, (1172), 1139 states have call predecessors, (1172), 1166 states have call successors, (1172) [2022-11-02 20:41:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 6042 transitions. [2022-11-02 20:41:31,411 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 6042 transitions. Word has length 408 [2022-11-02 20:41:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:31,412 INFO L495 AbstractCegarLoop]: Abstraction has 4271 states and 6042 transitions. [2022-11-02 20:41:31,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-02 20:41:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 6042 transitions. [2022-11-02 20:41:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-02 20:41:31,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:31,425 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, 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, 1] [2022-11-02 20:41:31,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:31,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:41:31,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1783296739, now seen corresponding path program 1 times [2022-11-02 20:41:31,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769108260] [2022-11-02 20:41:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:31,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:31,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:31,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769108260] [2022-11-02 20:41:31,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:31,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981699752] [2022-11-02 20:41:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:31,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:31,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:32,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:41:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 4412 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:41:33,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-11-02 20:41:33,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-02 20:41:34,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981699752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:34,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:34,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-02 20:41:34,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958678391] [2022-11-02 20:41:34,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:41:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:34,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:41:34,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:34,175 INFO L87 Difference]: Start difference. First operand 4271 states and 6042 transitions. Second operand has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 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) [2022-11-02 20:41:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:34,445 INFO L93 Difference]: Finished difference Result 8593 states and 12171 transitions. [2022-11-02 20:41:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:41:34,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 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 412 [2022-11-02 20:41:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:34,480 INFO L225 Difference]: With dead ends: 8593 [2022-11-02 20:41:34,480 INFO L226 Difference]: Without dead ends: 4349 [2022-11-02 20:41:34,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:34,502 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 51 mSDsluCounter, 9577 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 12782 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:34,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 12782 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2022-11-02 20:41:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 4349. [2022-11-02 20:41:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 2926 states have (on average 1.2901572112098427) internal successors, (3775), 3012 states have internal predecessors, (3775), 1185 states have call successors, (1185), 234 states have call predecessors, (1185), 237 states have return successors, (1190), 1157 states have call predecessors, (1190), 1184 states have call successors, (1190) [2022-11-02 20:41:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 6150 transitions. [2022-11-02 20:41:34,709 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 6150 transitions. Word has length 412 [2022-11-02 20:41:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:34,710 INFO L495 AbstractCegarLoop]: Abstraction has 4349 states and 6150 transitions. [2022-11-02 20:41:34,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 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) [2022-11-02 20:41:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 6150 transitions. [2022-11-02 20:41:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-11-02 20:41:34,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:34,725 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:34,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:34,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:34,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1314376469, now seen corresponding path program 2 times [2022-11-02 20:41:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:34,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623266565] [2022-11-02 20:41:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:35,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:35,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623266565] [2022-11-02 20:41:35,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930686489] [2022-11-02 20:41:35,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:35,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:35,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:35,318 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:35,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:41:36,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:41:36,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:41:36,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-11-02 20:41:36,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:36,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930686489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:36,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:36,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:41:36,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777650476] [2022-11-02 20:41:36,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:36,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:41:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:41:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:41:36,774 INFO L87 Difference]: Start difference. First operand 4349 states and 6150 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2022-11-02 20:41:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:37,416 INFO L93 Difference]: Finished difference Result 9187 states and 13100 transitions. [2022-11-02 20:41:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:41:37,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 424 [2022-11-02 20:41:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:37,455 INFO L225 Difference]: With dead ends: 9187 [2022-11-02 20:41:37,456 INFO L226 Difference]: Without dead ends: 4865 [2022-11-02 20:41:37,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:41:37,484 INFO L413 NwaCegarLoop]: 3591 mSDtfsCounter, 369 mSDsluCounter, 6602 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 10193 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 [2022-11-02 20:41:37,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 10193 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:41:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2022-11-02 20:41:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4353. [2022-11-02 20:41:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 2930 states have (on average 1.2897610921501705) internal successors, (3779), 3016 states have internal predecessors, (3779), 1185 states have call successors, (1185), 234 states have call predecessors, (1185), 237 states have return successors, (1190), 1157 states have call predecessors, (1190), 1184 states have call successors, (1190) [2022-11-02 20:41:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 6154 transitions. [2022-11-02 20:41:37,710 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 6154 transitions. Word has length 424 [2022-11-02 20:41:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:37,713 INFO L495 AbstractCegarLoop]: Abstraction has 4353 states and 6154 transitions. [2022-11-02 20:41:37,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2022-11-02 20:41:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 6154 transitions. [2022-11-02 20:41:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-11-02 20:41:37,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:37,726 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:37,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:37,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:41:37,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2083728615, now seen corresponding path program 1 times [2022-11-02 20:41:37,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:37,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488686032] [2022-11-02 20:41:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:37,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:38,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488686032] [2022-11-02 20:41:38,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:38,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271594521] [2022-11-02 20:41:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:38,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:38,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:38,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:38,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:41:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 4505 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:41:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-02 20:41:40,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-02 20:41:40,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271594521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:40,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:40,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 20:41:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855370946] [2022-11-02 20:41:40,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:40,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:41:40,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:41:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:41:40,638 INFO L87 Difference]: Start difference. First operand 4353 states and 6154 transitions. Second operand has 12 states, 12 states have (on average 24.916666666666668) internal successors, (299), 12 states have internal predecessors, (299), 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) [2022-11-02 20:41:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:41,109 INFO L93 Difference]: Finished difference Result 8835 states and 12509 transitions. [2022-11-02 20:41:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:41:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.916666666666668) internal successors, (299), 12 states have internal predecessors, (299), 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 429 [2022-11-02 20:41:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:41,137 INFO L225 Difference]: With dead ends: 8835 [2022-11-02 20:41:41,137 INFO L226 Difference]: Without dead ends: 4509 [2022-11-02 20:41:41,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:41:41,158 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 173 mSDsluCounter, 6470 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 9693 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:41,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 9693 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4509 states. [2022-11-02 20:41:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4509 to 4509. [2022-11-02 20:41:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4509 states, 3050 states have (on average 1.2862295081967212) internal successors, (3923), 3136 states have internal predecessors, (3923), 1221 states have call successors, (1221), 234 states have call predecessors, (1221), 237 states have return successors, (1226), 1193 states have call predecessors, (1226), 1220 states have call successors, (1226) [2022-11-02 20:41:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 6370 transitions. [2022-11-02 20:41:41,385 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 6370 transitions. Word has length 429 [2022-11-02 20:41:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:41,385 INFO L495 AbstractCegarLoop]: Abstraction has 4509 states and 6370 transitions. [2022-11-02 20:41:41,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.916666666666668) internal successors, (299), 12 states have internal predecessors, (299), 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) [2022-11-02 20:41:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 6370 transitions. [2022-11-02 20:41:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-02 20:41:41,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:41,401 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, 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] [2022-11-02 20:41:41,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:41,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:41,619 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1504801111, now seen corresponding path program 1 times [2022-11-02 20:41:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:41,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506777103] [2022-11-02 20:41:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:41,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:41,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40635544] [2022-11-02 20:41:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:41,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:41,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:41,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:41,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:41:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 4432 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:41:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-11-02 20:41:43,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-02 20:41:44,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506777103] [2022-11-02 20:41:44,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40635544] [2022-11-02 20:41:44,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40635544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:44,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:44,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:41:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168610090] [2022-11-02 20:41:44,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:44,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:41:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:41:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:41:44,277 INFO L87 Difference]: Start difference. First operand 4509 states and 6370 transitions. Second operand has 8 states, 8 states have (on average 28.625) internal successors, (229), 8 states have internal predecessors, (229), 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) [2022-11-02 20:41:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:44,583 INFO L93 Difference]: Finished difference Result 9083 states and 12892 transitions. [2022-11-02 20:41:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:41:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.625) internal successors, (229), 8 states have internal predecessors, (229), 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 410 [2022-11-02 20:41:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:44,611 INFO L225 Difference]: With dead ends: 9083 [2022-11-02 20:41:44,612 INFO L226 Difference]: Without dead ends: 4601 [2022-11-02 20:41:44,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 812 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:41:44,636 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 66 mSDsluCounter, 6403 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 9615 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:44,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 9615 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-11-02 20:41:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4581. [2022-11-02 20:41:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 3098 states have (on average 1.2843770174306004) internal successors, (3979), 3184 states have internal predecessors, (3979), 1245 states have call successors, (1245), 234 states have call predecessors, (1245), 237 states have return successors, (1250), 1217 states have call predecessors, (1250), 1244 states have call successors, (1250) [2022-11-02 20:41:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 6474 transitions. [2022-11-02 20:41:44,972 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 6474 transitions. Word has length 410 [2022-11-02 20:41:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:44,973 INFO L495 AbstractCegarLoop]: Abstraction has 4581 states and 6474 transitions. [2022-11-02 20:41:44,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.625) internal successors, (229), 8 states have internal predecessors, (229), 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) [2022-11-02 20:41:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 6474 transitions. [2022-11-02 20:41:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-11-02 20:41:44,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:44,995 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, 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] [2022-11-02 20:41:45,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:45,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:45,216 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1719753727, now seen corresponding path program 1 times [2022-11-02 20:41:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:45,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934536958] [2022-11-02 20:41:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:45,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:45,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934536958] [2022-11-02 20:41:45,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:45,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740867452] [2022-11-02 20:41:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:45,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:45,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:41:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 4585 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:41:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 24 proven. 190 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-02 20:41:47,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-02 20:41:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740867452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:48,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:48,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-02 20:41:48,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844520182] [2022-11-02 20:41:48,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:41:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:41:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:41:48,472 INFO L87 Difference]: Start difference. First operand 4581 states and 6474 transitions. Second operand has 24 states, 24 states have (on average 14.5) internal successors, (348), 24 states have internal predecessors, (348), 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) [2022-11-02 20:41:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:49,215 INFO L93 Difference]: Finished difference Result 9447 states and 13377 transitions. [2022-11-02 20:41:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:41:49,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.5) internal successors, (348), 24 states have internal predecessors, (348), 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 454 [2022-11-02 20:41:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:49,247 INFO L225 Difference]: With dead ends: 9447 [2022-11-02 20:41:49,247 INFO L226 Difference]: Without dead ends: 4893 [2022-11-02 20:41:49,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:41:49,273 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 342 mSDsluCounter, 25709 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 28968 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:49,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 28968 Invalid, 360 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [94 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:41:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2022-11-02 20:41:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 4893. [2022-11-02 20:41:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 3338 states have (on average 1.2783103654883163) internal successors, (4267), 3424 states have internal predecessors, (4267), 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) [2022-11-02 20:41:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 6906 transitions. [2022-11-02 20:41:49,506 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 6906 transitions. Word has length 454 [2022-11-02 20:41:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:49,507 INFO L495 AbstractCegarLoop]: Abstraction has 4893 states and 6906 transitions. [2022-11-02 20:41:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.5) internal successors, (348), 24 states have internal predecessors, (348), 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) [2022-11-02 20:41:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 6906 transitions. [2022-11-02 20:41:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-11-02 20:41:49,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:49,526 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, 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] [2022-11-02 20:41:49,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:49,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:49,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:49,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash -571124836, now seen corresponding path program 1 times [2022-11-02 20:41:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:49,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166593893] [2022-11-02 20:41:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:50,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:50,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166593893] [2022-11-02 20:41:50,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:50,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690421434] [2022-11-02 20:41:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:50,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:50,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:50,151 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:50,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:41:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 4567 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:41:52,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-02 20:41:52,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690421434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:52,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:52,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39604298] [2022-11-02 20:41:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:52,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:52,192 INFO L87 Difference]: Start difference. First operand 4893 states and 6906 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2022-11-02 20:41:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:52,385 INFO L93 Difference]: Finished difference Result 9843 states and 13950 transitions. [2022-11-02 20:41:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:52,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 436 [2022-11-02 20:41:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:52,415 INFO L225 Difference]: With dead ends: 9843 [2022-11-02 20:41:52,416 INFO L226 Difference]: Without dead ends: 4977 [2022-11-02 20:41:52,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:52,447 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 25 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6428 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 [2022-11-02 20:41:52,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6428 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-11-02 20:41:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4917. [2022-11-02 20:41:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4917 states, 3354 states have (on average 1.2787716159809184) internal successors, (4289), 3442 states have internal predecessors, (4289), 1325 states have call successors, (1325), 234 states have call predecessors, (1325), 237 states have return successors, (1330), 1297 states have call predecessors, (1330), 1324 states have call successors, (1330) [2022-11-02 20:41:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4917 states to 4917 states and 6944 transitions. [2022-11-02 20:41:52,661 INFO L78 Accepts]: Start accepts. Automaton has 4917 states and 6944 transitions. Word has length 436 [2022-11-02 20:41:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:52,662 INFO L495 AbstractCegarLoop]: Abstraction has 4917 states and 6944 transitions. [2022-11-02 20:41:52,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2022-11-02 20:41:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4917 states and 6944 transitions. [2022-11-02 20:41:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-11-02 20:41:52,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:52,685 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, 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] [2022-11-02 20:41:52,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:52,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:41:52,904 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1954370846, now seen corresponding path program 1 times [2022-11-02 20:41:52,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:52,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205681008] [2022-11-02 20:41:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:52,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:53,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:53,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205681008] [2022-11-02 20:41:53,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:53,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804782328] [2022-11-02 20:41:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:53,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:53,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:53,251 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:53,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:41:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 4564 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:41:55,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2022-11-02 20:41:55,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2022-11-02 20:41:55,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804782328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:55,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:55,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-02 20:41:55,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890555137] [2022-11-02 20:41:55,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:55,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:41:55,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:55,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:41:55,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:55,571 INFO L87 Difference]: Start difference. First operand 4917 states and 6944 transitions. Second operand has 6 states, 6 states have (on average 35.166666666666664) internal successors, (211), 6 states have internal predecessors, (211), 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) [2022-11-02 20:41:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:55,865 INFO L93 Difference]: Finished difference Result 9831 states and 13938 transitions. [2022-11-02 20:41:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:41:55,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.166666666666664) internal successors, (211), 6 states have internal predecessors, (211), 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 436 [2022-11-02 20:41:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:55,896 INFO L225 Difference]: With dead ends: 9831 [2022-11-02 20:41:55,897 INFO L226 Difference]: Without dead ends: 4941 [2022-11-02 20:41:55,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:55,922 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 8 mSDsluCounter, 6389 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9589 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:55,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9589 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4941 states. [2022-11-02 20:41:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4941 to 4941. [2022-11-02 20:41:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4941 states, 3372 states have (on average 1.2772835112692764) internal successors, (4307), 3460 states have internal predecessors, (4307), 1331 states have call successors, (1331), 234 states have call predecessors, (1331), 237 states have return successors, (1336), 1303 states have call predecessors, (1336), 1330 states have call successors, (1336) [2022-11-02 20:41:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4941 states to 4941 states and 6974 transitions. [2022-11-02 20:41:56,145 INFO L78 Accepts]: Start accepts. Automaton has 4941 states and 6974 transitions. Word has length 436 [2022-11-02 20:41:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:56,146 INFO L495 AbstractCegarLoop]: Abstraction has 4941 states and 6974 transitions. [2022-11-02 20:41:56,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.166666666666664) internal successors, (211), 6 states have internal predecessors, (211), 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) [2022-11-02 20:41:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4941 states and 6974 transitions. [2022-11-02 20:41:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-11-02 20:41:56,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:56,162 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, 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] [2022-11-02 20:41:56,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:56,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:41:56,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1661246798, now seen corresponding path program 2 times [2022-11-02 20:41:56,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:56,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382414977] [2022-11-02 20:41:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:56,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:56,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:56,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382414977] [2022-11-02 20:41:56,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:41:56,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15869380] [2022-11-02 20:41:56,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:56,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:56,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:56,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:56,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:41:58,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:41:58,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2417 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:41:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2022-11-02 20:41:58,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:41:58,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15869380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:58,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:58,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575114238] [2022-11-02 20:41:58,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:58,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:58,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:58,371 INFO L87 Difference]: Start difference. First operand 4941 states and 6974 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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) [2022-11-02 20:41:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:58,815 INFO L93 Difference]: Finished difference Result 14723 states and 20833 transitions. [2022-11-02 20:41:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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 457 [2022-11-02 20:41:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:58,886 INFO L225 Difference]: With dead ends: 14723 [2022-11-02 20:41:58,886 INFO L226 Difference]: Without dead ends: 9809 [2022-11-02 20:41:58,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:58,919 INFO L413 NwaCegarLoop]: 3815 mSDtfsCounter, 3147 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3147 SdHoareTripleChecker+Valid, 6978 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 [2022-11-02 20:41:58,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3147 Valid, 6978 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9809 states. [2022-11-02 20:41:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9809 to 9806. [2022-11-02 20:41:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9806 states, 6690 states have (on average 1.277727952167414) internal successors, (8548), 6871 states have internal predecessors, (8548), 2647 states have call successors, (2647), 466 states have call predecessors, (2647), 468 states have return successors, (2666), 2582 states have call predecessors, (2666), 2646 states have call successors, (2666) [2022-11-02 20:41:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9806 states to 9806 states and 13861 transitions. [2022-11-02 20:41:59,542 INFO L78 Accepts]: Start accepts. Automaton has 9806 states and 13861 transitions. Word has length 457 [2022-11-02 20:41:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 9806 states and 13861 transitions. [2022-11-02 20:41:59,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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) [2022-11-02 20:41:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 9806 states and 13861 transitions. [2022-11-02 20:41:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-11-02 20:41:59,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:59,571 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:59,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:59,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:41:59,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash 262510829, now seen corresponding path program 2 times [2022-11-02 20:41:59,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:59,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898701797] [2022-11-02 20:41:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:59,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:00,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898701797] [2022-11-02 20:42:00,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:42:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470973973] [2022-11-02 20:42:00,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:42:00,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:00,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:00,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:00,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:42:01,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:42:01,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:42:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2022-11-02 20:42:01,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:42:01,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470973973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:01,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:01,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:42:01,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887843338] [2022-11-02 20:42:01,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:01,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:42:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:42:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:42:01,908 INFO L87 Difference]: Start difference. First operand 9806 states and 13861 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-02 20:42:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:02,412 INFO L93 Difference]: Finished difference Result 19577 states and 27675 transitions. [2022-11-02 20:42:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:42:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 523 [2022-11-02 20:42:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:02,476 INFO L225 Difference]: With dead ends: 19577 [2022-11-02 20:42:02,477 INFO L226 Difference]: Without dead ends: 9798 [2022-11-02 20:42:02,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:42:02,528 INFO L413 NwaCegarLoop]: 3194 mSDtfsCounter, 3182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3182 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:02,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3182 Valid, 3194 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:42:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2022-11-02 20:42:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 9798. [2022-11-02 20:42:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9798 states, 6686 states have (on average 1.2772958420580318) internal successors, (8540), 6867 states have internal predecessors, (8540), 2643 states have call successors, (2643), 466 states have call predecessors, (2643), 468 states have return successors, (2662), 2578 states have call predecessors, (2662), 2642 states have call successors, (2662) [2022-11-02 20:42:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9798 states to 9798 states and 13845 transitions. [2022-11-02 20:42:03,390 INFO L78 Accepts]: Start accepts. Automaton has 9798 states and 13845 transitions. Word has length 523 [2022-11-02 20:42:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:03,391 INFO L495 AbstractCegarLoop]: Abstraction has 9798 states and 13845 transitions. [2022-11-02 20:42:03,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2022-11-02 20:42:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9798 states and 13845 transitions. [2022-11-02 20:42:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-11-02 20:42:03,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:03,430 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, 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] [2022-11-02 20:42:03,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:03,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:42:03,652 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash 623369589, now seen corresponding path program 1 times [2022-11-02 20:42:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:03,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635651185] [2022-11-02 20:42:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:03,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:04,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635651185] [2022-11-02 20:42:04,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:42:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578256991] [2022-11-02 20:42:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:04,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:04,033 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:04,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:42:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 4680 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:42:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-02 20:42:06,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-11-02 20:42:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578256991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:07,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:07,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 20:42:07,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145603739] [2022-11-02 20:42:07,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:07,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:42:07,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:07,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:42:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:42:07,028 INFO L87 Difference]: Start difference. First operand 9798 states and 13845 transitions. Second operand has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 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) [2022-11-02 20:42:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:07,702 INFO L93 Difference]: Finished difference Result 19665 states and 27890 transitions. [2022-11-02 20:42:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:42:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 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 458 [2022-11-02 20:42:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:07,765 INFO L225 Difference]: With dead ends: 19665 [2022-11-02 20:42:07,766 INFO L226 Difference]: Without dead ends: 9894 [2022-11-02 20:42:07,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:42:07,818 INFO L413 NwaCegarLoop]: 3202 mSDtfsCounter, 20 mSDsluCounter, 6387 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 9589 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:07,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 9589 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2022-11-02 20:42:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9894. [2022-11-02 20:42:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9894 states, 6758 states have (on average 1.2743415211601066) internal successors, (8612), 6939 states have internal predecessors, (8612), 2667 states have call successors, (2667), 466 states have call predecessors, (2667), 468 states have return successors, (2686), 2602 states have call predecessors, (2686), 2666 states have call successors, (2686) [2022-11-02 20:42:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9894 states to 9894 states and 13965 transitions. [2022-11-02 20:42:08,325 INFO L78 Accepts]: Start accepts. Automaton has 9894 states and 13965 transitions. Word has length 458 [2022-11-02 20:42:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:08,326 INFO L495 AbstractCegarLoop]: Abstraction has 9894 states and 13965 transitions. [2022-11-02 20:42:08,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 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) [2022-11-02 20:42:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9894 states and 13965 transitions. [2022-11-02 20:42:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-11-02 20:42:08,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:08,354 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 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] [2022-11-02 20:42:08,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:08,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:08,569 INFO L85 PathProgramCache]: Analyzing trace with hash -775100174, now seen corresponding path program 1 times [2022-11-02 20:42:08,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:08,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356314902] [2022-11-02 20:42:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356314902] [2022-11-02 20:42:08,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:42:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776186216] [2022-11-02 20:42:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:08,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:08,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:08,920 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:08,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:42:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:11,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:42:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 27 proven. 946 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2022-11-02 20:42:11,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-11-02 20:42:13,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776186216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:13,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:13,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-11-02 20:42:13,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444203183] [2022-11-02 20:42:13,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:13,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:42:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:42:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:42:13,411 INFO L87 Difference]: Start difference. First operand 9894 states and 13965 transitions. Second operand has 48 states, 48 states have (on average 10.0) internal successors, (480), 48 states have internal predecessors, (480), 2 states have call successors, (119), 2 states have call predecessors, (119), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2022-11-02 20:42:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:15,324 INFO L93 Difference]: Finished difference Result 21009 states and 29731 transitions. [2022-11-02 20:42:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:42:15,325 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 10.0) internal successors, (480), 48 states have internal predecessors, (480), 2 states have call successors, (119), 2 states have call predecessors, (119), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) Word has length 650 [2022-11-02 20:42:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:15,395 INFO L225 Difference]: With dead ends: 21009 [2022-11-02 20:42:15,395 INFO L226 Difference]: Without dead ends: 11142 [2022-11-02 20:42:15,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 1252 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:42:15,452 INFO L413 NwaCegarLoop]: 3327 mSDtfsCounter, 833 mSDsluCounter, 16463 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 19790 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:15,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 19790 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:42:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11142 states. [2022-11-02 20:42:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11142 to 11142. [2022-11-02 20:42:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11142 states, 7718 states have (on average 1.2650945840891423) internal successors, (9764), 7899 states have internal predecessors, (9764), 2955 states have call successors, (2955), 466 states have call predecessors, (2955), 468 states have return successors, (2974), 2890 states have call predecessors, (2974), 2954 states have call successors, (2974) [2022-11-02 20:42:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11142 states to 11142 states and 15693 transitions. [2022-11-02 20:42:16,234 INFO L78 Accepts]: Start accepts. Automaton has 11142 states and 15693 transitions. Word has length 650 [2022-11-02 20:42:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:16,235 INFO L495 AbstractCegarLoop]: Abstraction has 11142 states and 15693 transitions. [2022-11-02 20:42:16,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 10.0) internal successors, (480), 48 states have internal predecessors, (480), 2 states have call successors, (119), 2 states have call predecessors, (119), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2022-11-02 20:42:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11142 states and 15693 transitions. [2022-11-02 20:42:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-11-02 20:42:16,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:16,264 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, 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] [2022-11-02 20:42:16,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:16,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:42:16,476 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1554677429, now seen corresponding path program 2 times [2022-11-02 20:42:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:16,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695044036] [2022-11-02 20:42:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:16,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695044036] [2022-11-02 20:42:16,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:42:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431556720] [2022-11-02 20:42:16,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:42:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:16,845 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:16,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:42:18,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:42:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:42:18,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2022-11-02 20:42:18,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:42:18,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431556720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:18,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:18,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:42:18,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145294245] [2022-11-02 20:42:18,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:42:18,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:42:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:42:18,416 INFO L87 Difference]: Start difference. First operand 11142 states and 15693 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2022-11-02 20:42:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:19,321 INFO L93 Difference]: Finished difference Result 27823 states and 39230 transitions. [2022-11-02 20:42:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:42:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 500 [2022-11-02 20:42:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:19,442 INFO L225 Difference]: With dead ends: 27823 [2022-11-02 20:42:19,443 INFO L226 Difference]: Without dead ends: 16708 [2022-11-02 20:42:19,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:42:19,525 INFO L413 NwaCegarLoop]: 3792 mSDtfsCounter, 3169 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3169 SdHoareTripleChecker+Valid, 6951 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 [2022-11-02 20:42:19,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3169 Valid, 6951 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2022-11-02 20:42:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 16705. [2022-11-02 20:42:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16705 states, 11576 states have (on average 1.264426399447132) internal successors, (14637), 11845 states have internal predecessors, (14637), 4424 states have call successors, (4424), 698 states have call predecessors, (4424), 704 states have return successors, (4467), 4332 states have call predecessors, (4467), 4423 states have call successors, (4467) [2022-11-02 20:42:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16705 states to 16705 states and 23528 transitions. [2022-11-02 20:42:20,584 INFO L78 Accepts]: Start accepts. Automaton has 16705 states and 23528 transitions. Word has length 500 [2022-11-02 20:42:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:20,584 INFO L495 AbstractCegarLoop]: Abstraction has 16705 states and 23528 transitions. [2022-11-02 20:42:20,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2022-11-02 20:42:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 16705 states and 23528 transitions. [2022-11-02 20:42:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-11-02 20:42:20,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:20,633 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, 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] [2022-11-02 20:42:20,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:20,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:20,855 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1730251653, now seen corresponding path program 1 times [2022-11-02 20:42:20,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:20,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743621719] [2022-11-02 20:42:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:21,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743621719] [2022-11-02 20:42:21,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:42:21,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624376995] [2022-11-02 20:42:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:21,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:21,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:21,206 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:21,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:42:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:23,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 4910 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:42:23,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 9 proven. 190 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-11-02 20:42:23,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-11-02 20:42:24,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624376995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:24,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:24,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-02 20:42:24,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250665308] [2022-11-02 20:42:24,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:24,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:42:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:42:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:42:24,439 INFO L87 Difference]: Start difference. First operand 16705 states and 23528 transitions. Second operand has 24 states, 24 states have (on average 11.125) internal successors, (267), 24 states have internal predecessors, (267), 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) [2022-11-02 20:42:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:25,456 INFO L93 Difference]: Finished difference Result 33671 states and 47585 transitions. [2022-11-02 20:42:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:42:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 11.125) internal successors, (267), 24 states have internal predecessors, (267), 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 501 [2022-11-02 20:42:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:25,560 INFO L225 Difference]: With dead ends: 33671 [2022-11-02 20:42:25,560 INFO L226 Difference]: Without dead ends: 16993 [2022-11-02 20:42:25,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 978 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:42:25,659 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 66 mSDsluCounter, 6399 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 9613 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:25,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 9613 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16993 states. [2022-11-02 20:42:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16993 to 16993. [2022-11-02 20:42:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 11792 states have (on average 1.2595827679782903) internal successors, (14853), 12061 states have internal predecessors, (14853), 4496 states have call successors, (4496), 698 states have call predecessors, (4496), 704 states have return successors, (4539), 4404 states have call predecessors, (4539), 4495 states have call successors, (4539) [2022-11-02 20:42:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 23888 transitions. [2022-11-02 20:42:26,780 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 23888 transitions. Word has length 501 [2022-11-02 20:42:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:26,781 INFO L495 AbstractCegarLoop]: Abstraction has 16993 states and 23888 transitions. [2022-11-02 20:42:26,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.125) internal successors, (267), 24 states have internal predecessors, (267), 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) [2022-11-02 20:42:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 23888 transitions. [2022-11-02 20:42:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2022-11-02 20:42:26,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:26,844 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 22, 22, 22, 22, 22, 22, 22, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 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] [2022-11-02 20:42:26,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:27,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 73434638, now seen corresponding path program 1 times [2022-11-02 20:42:27,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:27,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630640475] [2022-11-02 20:42:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:27,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:42:27,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782086356] [2022-11-02 20:42:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:27,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:27,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:27,308 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:27,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:42:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:29,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 6218 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:42:29,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 27 proven. 4186 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2022-11-02 20:42:31,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 2134 trivial. 0 not checked. [2022-11-02 20:42:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:36,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630640475] [2022-11-02 20:42:36,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:42:36,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782086356] [2022-11-02 20:42:36,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782086356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:36,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:36,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-11-02 20:42:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684125965] [2022-11-02 20:42:36,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:36,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-02 20:42:36,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-02 20:42:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2022-11-02 20:42:36,108 INFO L87 Difference]: Start difference. First operand 16993 states and 23888 transitions. Second operand has 96 states, 96 states have (on average 7.03125) internal successors, (675), 96 states have internal predecessors, (675), 2 states have call successors, (119), 2 states have call predecessors, (119), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2022-11-02 20:42:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:40,945 INFO L93 Difference]: Finished difference Result 37703 states and 53231 transitions. [2022-11-02 20:42:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-02 20:42:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 7.03125) internal successors, (675), 96 states have internal predecessors, (675), 2 states have call successors, (119), 2 states have call predecessors, (119), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) Word has length 833 [2022-11-02 20:42:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:41,023 INFO L225 Difference]: With dead ends: 37703 [2022-11-02 20:42:41,023 INFO L226 Difference]: Without dead ends: 20737 [2022-11-02 20:42:41,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1664 GetRequests, 1570 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2022-11-02 20:42:41,094 INFO L413 NwaCegarLoop]: 3471 mSDtfsCounter, 1885 mSDsluCounter, 13935 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 1057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2167 SdHoareTripleChecker+Valid, 17406 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1057 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:41,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2167 Valid, 17406 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1057 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-02 20:42:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20737 states. [2022-11-02 20:42:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20737 to 20737. [2022-11-02 20:42:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20737 states, 14672 states have (on average 1.2478871319520175) internal successors, (18309), 14941 states have internal predecessors, (18309), 5360 states have call successors, (5360), 698 states have call predecessors, (5360), 704 states have return successors, (5403), 5268 states have call predecessors, (5403), 5359 states have call successors, (5403) [2022-11-02 20:42:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20737 states to 20737 states and 29072 transitions. [2022-11-02 20:42:42,240 INFO L78 Accepts]: Start accepts. Automaton has 20737 states and 29072 transitions. Word has length 833 [2022-11-02 20:42:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:42,241 INFO L495 AbstractCegarLoop]: Abstraction has 20737 states and 29072 transitions. [2022-11-02 20:42:42,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 7.03125) internal successors, (675), 96 states have internal predecessors, (675), 2 states have call successors, (119), 2 states have call predecessors, (119), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2022-11-02 20:42:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 20737 states and 29072 transitions. [2022-11-02 20:42:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-11-02 20:42:42,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:42,278 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, 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] [2022-11-02 20:42:42,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-02 20:42:42,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:42,491 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash -44231163, now seen corresponding path program 2 times [2022-11-02 20:42:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964100429] [2022-11-02 20:42:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:42,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:42,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964100429] [2022-11-02 20:42:42,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:42:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783904] [2022-11-02 20:42:42,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:42:42,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:42,824 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:42,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:42:44,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:42:44,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:42:44,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1996 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1996 trivial. 0 not checked. [2022-11-02 20:42:44,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:42:44,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:44,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:44,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:42:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162005278] [2022-11-02 20:42:44,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:44,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:42:44,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:44,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:42:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:42:44,720 INFO L87 Difference]: Start difference. First operand 20737 states and 29072 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 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) [2022-11-02 20:42:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:51,956 INFO L93 Difference]: Finished difference Result 54093 states and 76780 transitions. [2022-11-02 20:42:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:42:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 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 585 [2022-11-02 20:42:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:52,105 INFO L225 Difference]: With dead ends: 54093 [2022-11-02 20:42:52,105 INFO L226 Difference]: Without dead ends: 33383 [2022-11-02 20:42:52,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:42:52,197 INFO L413 NwaCegarLoop]: 5174 mSDtfsCounter, 4847 mSDsluCounter, 8047 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5152 SdHoareTripleChecker+Valid, 13221 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:52,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5152 Valid, 13221 Invalid, 3786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [85 Valid, 3701 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-02 20:42:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33383 states. [2022-11-02 20:42:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33383 to 27640. [2022-11-02 20:42:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27640 states, 19561 states have (on average 1.2475333571903278) internal successors, (24403), 19918 states have internal predecessors, (24403), 7138 states have call successors, (7138), 930 states have call predecessors, (7138), 940 states have return successors, (7205), 7019 states have call predecessors, (7205), 7137 states have call successors, (7205) [2022-11-02 20:42:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27640 states to 27640 states and 38746 transitions. [2022-11-02 20:42:54,144 INFO L78 Accepts]: Start accepts. Automaton has 27640 states and 38746 transitions. Word has length 585 [2022-11-02 20:42:54,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:54,145 INFO L495 AbstractCegarLoop]: Abstraction has 27640 states and 38746 transitions. [2022-11-02 20:42:54,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 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) [2022-11-02 20:42:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 27640 states and 38746 transitions. [2022-11-02 20:42:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-11-02 20:42:54,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:54,194 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, 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] [2022-11-02 20:42:54,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:54,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 20:42:54,395 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1428840180, now seen corresponding path program 1 times [2022-11-02 20:42:54,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:54,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458159436] [2022-11-02 20:42:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:54,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458159436] [2022-11-02 20:42:54,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:42:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050556524] [2022-11-02 20:42:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:54,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:54,704 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:42:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:56,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 5368 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:42:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1996 backedges. 9 proven. 946 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2022-11-02 20:42:57,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1996 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2022-11-02 20:42:58,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050556524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:58,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:58,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-11-02 20:42:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949014374] [2022-11-02 20:42:58,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:42:58,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:42:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:42:58,940 INFO L87 Difference]: Start difference. First operand 27640 states and 38746 transitions. Second operand has 48 states, 48 states have (on average 7.083333333333333) internal successors, (340), 48 states have internal predecessors, (340), 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) [2022-11-02 20:43:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:00,812 INFO L93 Difference]: Finished difference Result 56021 states and 78779 transitions. [2022-11-02 20:43:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:43:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 7.083333333333333) internal successors, (340), 48 states have internal predecessors, (340), 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 586 [2022-11-02 20:43:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:00,914 INFO L225 Difference]: With dead ends: 56021 [2022-11-02 20:43:00,914 INFO L226 Difference]: Without dead ends: 28408 [2022-11-02 20:43:01,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1124 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:43:01,023 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 138 mSDsluCounter, 6423 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 9661 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:01,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 9661 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:43:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28408 states. [2022-11-02 20:43:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28408 to 28408. [2022-11-02 20:43:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28408 states, 20137 states have (on average 1.24045289765109) internal successors, (24979), 20494 states have internal predecessors, (24979), 7330 states have call successors, (7330), 930 states have call predecessors, (7330), 940 states have return successors, (7397), 7211 states have call predecessors, (7397), 7329 states have call successors, (7397) [2022-11-02 20:43:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28408 states to 28408 states and 39706 transitions. [2022-11-02 20:43:02,670 INFO L78 Accepts]: Start accepts. Automaton has 28408 states and 39706 transitions. Word has length 586 [2022-11-02 20:43:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:02,670 INFO L495 AbstractCegarLoop]: Abstraction has 28408 states and 39706 transitions. [2022-11-02 20:43:02,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 7.083333333333333) internal successors, (340), 48 states have internal predecessors, (340), 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) [2022-11-02 20:43:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28408 states and 39706 transitions. [2022-11-02 20:43:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-11-02 20:43:02,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:02,720 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:02,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:02,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:43:02,921 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:02,921 INFO L85 PathProgramCache]: Analyzing trace with hash 765675940, now seen corresponding path program 1 times [2022-11-02 20:43:02,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:02,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880945188] [2022-11-02 20:43:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:02,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:03,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:03,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880945188] [2022-11-02 20:43:03,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:43:03,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511304480] [2022-11-02 20:43:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:03,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:03,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:03,256 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:03,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:43:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 5883 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:43:05,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2022-11-02 20:43:05,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:05,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511304480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:05,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:05,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:05,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411414072] [2022-11-02 20:43:05,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:05,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:05,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:05,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:05,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:05,619 INFO L87 Difference]: Start difference. First operand 28408 states and 39706 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-11-02 20:43:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:08,088 INFO L93 Difference]: Finished difference Result 82948 states and 116008 transitions. [2022-11-02 20:43:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 538 [2022-11-02 20:43:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:08,314 INFO L225 Difference]: With dead ends: 82948 [2022-11-02 20:43:08,315 INFO L226 Difference]: Without dead ends: 54567 [2022-11-02 20:43:08,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:08,429 INFO L413 NwaCegarLoop]: 4511 mSDtfsCounter, 2713 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 7659 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 [2022-11-02 20:43:08,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2713 Valid, 7659 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:43:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54567 states. [2022-11-02 20:43:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54567 to 54556. [2022-11-02 20:43:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54556 states, 38728 states have (on average 1.2403429043586036) internal successors, (48036), 39366 states have internal predecessors, (48036), 14066 states have call successors, (14066), 1740 states have call predecessors, (14066), 1761 states have return successors, (14201), 13873 states have call predecessors, (14201), 14065 states have call successors, (14201) [2022-11-02 20:43:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54556 states to 54556 states and 76303 transitions. [2022-11-02 20:43:11,460 INFO L78 Accepts]: Start accepts. Automaton has 54556 states and 76303 transitions. Word has length 538 [2022-11-02 20:43:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:11,460 INFO L495 AbstractCegarLoop]: Abstraction has 54556 states and 76303 transitions. [2022-11-02 20:43:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-11-02 20:43:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 54556 states and 76303 transitions. [2022-11-02 20:43:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-11-02 20:43:11,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:11,598 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:11,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-02 20:43:11,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:11,798 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:43:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1717371479, now seen corresponding path program 1 times [2022-11-02 20:43:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:11,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182082998] [2022-11-02 20:43:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182082998] [2022-11-02 20:43:12,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:43:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575088217] [2022-11-02 20:43:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:12,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:12,080 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:12,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234444df-96c7-4a85-8158-f38127cc5baa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:43:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 6059 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:43:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-11-02 20:43:14,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:14,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575088217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:14,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:14,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479331604] [2022-11-02 20:43:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:14,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:14,967 INFO L87 Difference]: Start difference. First operand 54556 states and 76303 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2022-11-02 20:43:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:18,818 INFO L93 Difference]: Finished difference Result 135736 states and 189883 transitions. [2022-11-02 20:43:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 573 [2022-11-02 20:43:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:19,202 INFO L225 Difference]: With dead ends: 135736 [2022-11-02 20:43:19,202 INFO L226 Difference]: Without dead ends: 81217 [2022-11-02 20:43:19,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:19,642 INFO L413 NwaCegarLoop]: 4250 mSDtfsCounter, 2859 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2859 SdHoareTripleChecker+Valid, 7177 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 [2022-11-02 20:43:19,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2859 Valid, 7177 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:43:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81217 states.