./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8 --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 dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- 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-e04fb08 [2022-11-16 12:23:30,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:23:30,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:23:30,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:23:30,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:23:30,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:23:30,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:23:30,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:23:30,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:23:30,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:23:30,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:23:30,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:23:30,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:23:30,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:23:30,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:23:30,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:23:30,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:23:30,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:23:30,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:23:30,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:23:30,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:23:30,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:23:30,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:23:30,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:23:30,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:23:30,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:23:30,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:23:30,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:23:30,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:23:30,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:23:30,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:23:30,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:23:30,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:23:30,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:23:30,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:23:30,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:23:30,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:23:30,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:23:30,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:23:30,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:23:30,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:23:30,846 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:23:30,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:23:30,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:23:30,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:23:30,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:23:30,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:23:30,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:23:30,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:23:30,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:23:30,883 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:23:30,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:23:30,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:23:30,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:23:30,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:23:30,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:23:30,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:23:30,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:23:30,892 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:23:30,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:23:30,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:23:30,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:23:30,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:23:30,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:23:30,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:23:30,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:23:30,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:23:30,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:23:30,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:23:30,896 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:23:30,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:23:30,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:23:30,898 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_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2022-11-16 12:23:31,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:23:31,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:23:31,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:23:31,258 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:23:31,259 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:23:31,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-11-16 12:23:31,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/data/c2c763fa1/51982c123d8c4f9fb6049f13dcc9ad1b/FLAG5f1fd5e45 [2022-11-16 12:23:32,220 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:23:32,221 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-11-16 12:23:32,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/data/c2c763fa1/51982c123d8c4f9fb6049f13dcc9ad1b/FLAG5f1fd5e45 [2022-11-16 12:23:32,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/data/c2c763fa1/51982c123d8c4f9fb6049f13dcc9ad1b [2022-11-16 12:23:32,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:23:32,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:23:32,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:23:32,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:23:32,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:23:32,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:23:32" (1/1) ... [2022-11-16 12:23:32,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30592c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:32, skipping insertion in model container [2022-11-16 12:23:32,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:23:32" (1/1) ... [2022-11-16 12:23:32,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:23:32,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:23:33,510 WARN L1255 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-11-16 12:23:33,511 WARN L1255 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-11-16 12:23:33,820 WARN L229 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_06be1684-fc1e-422a-bf36-d6fcb1d417ef/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-11-16 12:23:34,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:23:34,808 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:23:35,039 WARN L1255 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-11-16 12:23:35,040 WARN L1255 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-11-16 12:23:35,048 WARN L229 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_06be1684-fc1e-422a-bf36-d6fcb1d417ef/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-11-16 12:23:35,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:23:35,391 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:23:35,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35 WrapperNode [2022-11-16 12:23:35,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:23:35,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:23:35,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:23:35,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:23:35,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,580 INFO L138 Inliner]: procedures = 202, calls = 1984, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2099 [2022-11-16 12:23:35,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:23:35,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:23:35,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:23:35,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:23:35,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,722 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:23:35,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:23:35,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:23:35,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:23:35,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (1/1) ... [2022-11-16 12:23:35,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:23:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:35,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:23:35,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:23:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-11-16 12:23:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-11-16 12:23:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-16 12:23:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-16 12:23:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 12:23:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 12:23:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-16 12:23:35,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-16 12:23:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-16 12:23:35,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-16 12:23:35,847 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 12:23:35,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 12:23:35,847 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 12:23:35,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 12:23:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:23:35,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:23:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2022-11-16 12:23:35,848 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2022-11-16 12:23:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-16 12:23:35,849 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-16 12:23:35,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:23:35,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:23:35,849 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-16 12:23:35,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-16 12:23:35,850 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-16 12:23:35,850 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-16 12:23:35,850 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2022-11-16 12:23:35,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2022-11-16 12:23:35,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:23:35,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:23:35,851 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-16 12:23:35,851 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-16 12:23:35,851 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-16 12:23:35,852 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-16 12:23:35,852 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-16 12:23:35,853 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-16 12:23:35,853 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-16 12:23:35,853 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-16 12:23:35,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 12:23:35,853 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-16 12:23:35,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-16 12:23:35,854 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2022-11-16 12:23:35,854 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2022-11-16 12:23:35,855 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2022-11-16 12:23:35,855 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2022-11-16 12:23:35,855 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-16 12:23:35,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-16 12:23:35,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 12:23:35,856 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2022-11-16 12:23:35,856 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2022-11-16 12:23:35,856 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2022-11-16 12:23:35,857 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2022-11-16 12:23:35,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:23:35,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 12:23:35,859 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 12:23:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2022-11-16 12:23:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2022-11-16 12:23:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-16 12:23:35,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-16 12:23:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-16 12:23:35,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-16 12:23:35,862 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-16 12:23:35,862 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-16 12:23:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:23:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2022-11-16 12:23:35,863 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2022-11-16 12:23:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:23:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-16 12:23:35,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-16 12:23:35,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:23:35,864 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2022-11-16 12:23:35,864 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2022-11-16 12:23:35,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:23:35,865 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2022-11-16 12:23:35,866 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2022-11-16 12:23:35,866 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2022-11-16 12:23:35,866 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2022-11-16 12:23:35,866 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-16 12:23:35,867 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-16 12:23:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:23:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:23:35,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:23:36,362 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:23:36,364 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:23:36,611 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-16 12:23:41,522 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:23:41,543 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:23:41,544 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 12:23:41,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:23:41 BoogieIcfgContainer [2022-11-16 12:23:41,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:23:41,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:23:41,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:23:41,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:23:41,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:23:32" (1/3) ... [2022-11-16 12:23:41,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec6cdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:23:41, skipping insertion in model container [2022-11-16 12:23:41,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:23:35" (2/3) ... [2022-11-16 12:23:41,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec6cdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:23:41, skipping insertion in model container [2022-11-16 12:23:41,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:23:41" (3/3) ... [2022-11-16 12:23:41,561 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-11-16 12:23:41,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:23:41,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:23:41,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:23:41,688 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;@72339cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:23:41,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:23:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 494 states, 365 states have (on average 1.347945205479452) internal successors, (492), 374 states have internal predecessors, (492), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-16 12:23:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 12:23:41,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:41,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:41,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1757998490, now seen corresponding path program 1 times [2022-11-16 12:23:41,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827770784] [2022-11-16 12:23:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:41,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:42,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:42,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827770784] [2022-11-16 12:23:42,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827770784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:23:42,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:23:42,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:23:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517731907] [2022-11-16 12:23:42,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:23:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:23:42,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:42,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:23:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:23:42,567 INFO L87 Difference]: Start difference. First operand has 494 states, 365 states have (on average 1.347945205479452) internal successors, (492), 374 states have internal predecessors, (492), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:23:47,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:47,446 INFO L93 Difference]: Finished difference Result 1067 states and 1518 transitions. [2022-11-16 12:23:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:23:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-16 12:23:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:47,478 INFO L225 Difference]: With dead ends: 1067 [2022-11-16 12:23:47,482 INFO L226 Difference]: Without dead ends: 555 [2022-11-16 12:23:47,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:23:47,498 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 216 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:47,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1065 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 747 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-16 12:23:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-16 12:23:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 504. [2022-11-16 12:23:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 377 states have (on average 1.336870026525199) internal successors, (504), 381 states have internal predecessors, (504), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-16 12:23:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 689 transitions. [2022-11-16 12:23:47,627 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 689 transitions. Word has length 30 [2022-11-16 12:23:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:47,627 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 689 transitions. [2022-11-16 12:23:47,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:23:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 689 transitions. [2022-11-16 12:23:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 12:23:47,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:47,631 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:23:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:23:47,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1990411924, now seen corresponding path program 1 times [2022-11-16 12:23:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:47,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656258586] [2022-11-16 12:23:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:47,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:47,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:23:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:23:47,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:47,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656258586] [2022-11-16 12:23:47,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656258586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:23:47,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:23:47,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:23:47,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657135357] [2022-11-16 12:23:47,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:23:47,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:23:47,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:23:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:23:47,969 INFO L87 Difference]: Start difference. First operand 504 states and 689 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:23:52,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:52,522 INFO L93 Difference]: Finished difference Result 1051 states and 1466 transitions. [2022-11-16 12:23:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:23:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-11-16 12:23:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:52,528 INFO L225 Difference]: With dead ends: 1051 [2022-11-16 12:23:52,528 INFO L226 Difference]: Without dead ends: 563 [2022-11-16 12:23:52,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:23:52,532 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 172 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:52,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1037 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 739 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-16 12:23:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-16 12:23:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 511. [2022-11-16 12:23:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 384 states have (on average 1.3385416666666667) internal successors, (514), 388 states have internal predecessors, (514), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-16 12:23:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 699 transitions. [2022-11-16 12:23:52,570 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 699 transitions. Word has length 49 [2022-11-16 12:23:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:52,571 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 699 transitions. [2022-11-16 12:23:52,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:23:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 699 transitions. [2022-11-16 12:23:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:23:52,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:52,574 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:23:52,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:23:52,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:52,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2126775744, now seen corresponding path program 1 times [2022-11-16 12:23:52,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:52,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171081314] [2022-11-16 12:23:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:52,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:23:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:23:52,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:52,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171081314] [2022-11-16 12:23:52,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171081314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:23:52,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:23:52,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:23:52,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823416549] [2022-11-16 12:23:52,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:23:52,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:23:52,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:23:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:23:52,892 INFO L87 Difference]: Start difference. First operand 511 states and 699 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:23:56,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:57,156 INFO L93 Difference]: Finished difference Result 1058 states and 1477 transitions. [2022-11-16 12:23:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:23:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-16 12:23:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:57,161 INFO L225 Difference]: With dead ends: 1058 [2022-11-16 12:23:57,161 INFO L226 Difference]: Without dead ends: 563 [2022-11-16 12:23:57,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:23:57,165 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 164 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 94 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:57,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1035 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 740 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-16 12:23:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-16 12:23:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 513. [2022-11-16 12:23:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 386 states have (on average 1.3367875647668395) internal successors, (516), 390 states have internal predecessors, (516), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-16 12:23:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 701 transitions. [2022-11-16 12:23:57,202 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 701 transitions. Word has length 55 [2022-11-16 12:23:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:57,202 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 701 transitions. [2022-11-16 12:23:57,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:23:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 701 transitions. [2022-11-16 12:23:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:23:57,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:57,205 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:23:57,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:23:57,206 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1147123198, now seen corresponding path program 1 times [2022-11-16 12:23:57,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:57,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043656654] [2022-11-16 12:23:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:57,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:57,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:23:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:23:57,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:57,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043656654] [2022-11-16 12:23:57,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043656654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:23:57,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:23:57,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:23:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977862550] [2022-11-16 12:23:57,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:23:57,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:23:57,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:23:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:23:57,548 INFO L87 Difference]: Start difference. First operand 513 states and 701 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:24:00,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:01,136 INFO L93 Difference]: Finished difference Result 1103 states and 1545 transitions. [2022-11-16 12:24:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:24:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-16 12:24:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:01,140 INFO L225 Difference]: With dead ends: 1103 [2022-11-16 12:24:01,140 INFO L226 Difference]: Without dead ends: 606 [2022-11-16 12:24:01,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:24:01,144 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 221 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:01,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1038 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-16 12:24:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-16 12:24:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 554. [2022-11-16 12:24:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 425 states have (on average 1.3529411764705883) internal successors, (575), 429 states have internal predecessors, (575), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-16 12:24:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 764 transitions. [2022-11-16 12:24:01,174 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 764 transitions. Word has length 55 [2022-11-16 12:24:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:01,175 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 764 transitions. [2022-11-16 12:24:01,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:24:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 764 transitions. [2022-11-16 12:24:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:24:01,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:01,178 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:24:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:24:01,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:01,179 INFO L85 PathProgramCache]: Analyzing trace with hash -377236764, now seen corresponding path program 1 times [2022-11-16 12:24:01,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:01,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777790376] [2022-11-16 12:24:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:01,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:24:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:01,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:24:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:24:01,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:01,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777790376] [2022-11-16 12:24:01,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777790376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:24:01,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:24:01,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:24:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294965479] [2022-11-16 12:24:01,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:24:01,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:24:01,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:24:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:24:01,630 INFO L87 Difference]: Start difference. First operand 554 states and 764 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:24:07,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:09,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:11,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:13,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:13,817 INFO L93 Difference]: Finished difference Result 1516 states and 2201 transitions. [2022-11-16 12:24:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:24:13,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-11-16 12:24:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:13,824 INFO L225 Difference]: With dead ends: 1516 [2022-11-16 12:24:13,824 INFO L226 Difference]: Without dead ends: 978 [2022-11-16 12:24:13,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:24:13,828 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 677 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 312 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:13,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1308 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1210 Invalid, 4 Unknown, 0 Unchecked, 12.0s Time] [2022-11-16 12:24:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-16 12:24:13,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 556. [2022-11-16 12:24:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 427 states have (on average 1.351288056206089) internal successors, (577), 431 states have internal predecessors, (577), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-16 12:24:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 766 transitions. [2022-11-16 12:24:13,865 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 766 transitions. Word has length 78 [2022-11-16 12:24:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:13,865 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 766 transitions. [2022-11-16 12:24:13,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:24:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 766 transitions. [2022-11-16 12:24:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:24:13,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:13,868 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:24:13,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:24:13,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:13,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1418125323, now seen corresponding path program 1 times [2022-11-16 12:24:13,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:13,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757772760] [2022-11-16 12:24:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:13,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:14,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:14,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:24:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:14,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:24:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:14,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 12:24:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:14,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:24:14,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:14,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757772760] [2022-11-16 12:24:14,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757772760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:24:14,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:24:14,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:24:14,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807889460] [2022-11-16 12:24:14,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:24:14,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:24:14,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:14,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:24:14,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:24:14,498 INFO L87 Difference]: Start difference. First operand 556 states and 766 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:24:20,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:22,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:23,633 INFO L93 Difference]: Finished difference Result 1445 states and 2026 transitions. [2022-11-16 12:24:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:24:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 82 [2022-11-16 12:24:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:23,639 INFO L225 Difference]: With dead ends: 1445 [2022-11-16 12:24:23,639 INFO L226 Difference]: Without dead ends: 905 [2022-11-16 12:24:23,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:24:23,642 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 1382 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 580 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:23,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1417 Valid, 1203 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 1415 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2022-11-16 12:24:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-16 12:24:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 693. [2022-11-16 12:24:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 527 states have (on average 1.3396584440227703) internal successors, (706), 532 states have internal predecessors, (706), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-11-16 12:24:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 941 transitions. [2022-11-16 12:24:23,685 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 941 transitions. Word has length 82 [2022-11-16 12:24:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:23,686 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 941 transitions. [2022-11-16 12:24:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:24:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 941 transitions. [2022-11-16 12:24:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 12:24:23,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:23,688 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:24:23,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:24:23,688 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash -865910721, now seen corresponding path program 1 times [2022-11-16 12:24:23,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:23,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771032964] [2022-11-16 12:24:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:23,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:24,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:24,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:24:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:24,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:24:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:24:24,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:24,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771032964] [2022-11-16 12:24:24,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771032964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89607020] [2022-11-16 12:24:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:24,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:24,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:24,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:24:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:24:24,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:24:24,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:24:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:24:25,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89607020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:24:25,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:24:25,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-16 12:24:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15657309] [2022-11-16 12:24:25,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:24:25,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:24:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:24:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:24:25,008 INFO L87 Difference]: Start difference. First operand 693 states and 941 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:24:31,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:33,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:35,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:37,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:39,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:41,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:43,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:45,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:46,556 INFO L93 Difference]: Finished difference Result 2634 states and 3884 transitions. [2022-11-16 12:24:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:24:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2022-11-16 12:24:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:46,566 INFO L225 Difference]: With dead ends: 2634 [2022-11-16 12:24:46,566 INFO L226 Difference]: Without dead ends: 1957 [2022-11-16 12:24:46,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:24:46,570 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 1987 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 708 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:46,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2199 Valid, 2188 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 2175 Invalid, 8 Unknown, 0 Unchecked, 21.2s Time] [2022-11-16 12:24:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-16 12:24:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 723. [2022-11-16 12:24:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 557 states have (on average 1.3429084380610412) internal successors, (748), 562 states have internal predecessors, (748), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-11-16 12:24:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 983 transitions. [2022-11-16 12:24:46,640 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 983 transitions. Word has length 83 [2022-11-16 12:24:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:46,640 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 983 transitions. [2022-11-16 12:24:46,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:24:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 983 transitions. [2022-11-16 12:24:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 12:24:46,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:46,642 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 12:24:46,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:46,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:46,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1192468033, now seen corresponding path program 1 times [2022-11-16 12:24:46,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:46,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123054453] [2022-11-16 12:24:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:46,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:47,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:47,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:24:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:47,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:24:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:47,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:24:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:47,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:24:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:47,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:24:47,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123054453] [2022-11-16 12:24:47,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123054453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:47,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338696469] [2022-11-16 12:24:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:47,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:47,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:47,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:24:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:48,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 3717 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:24:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:24:48,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:24:48,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338696469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:24:48,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:24:48,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-16 12:24:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077441002] [2022-11-16 12:24:48,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:24:48,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:24:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:24:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:24:48,504 INFO L87 Difference]: Start difference. First operand 723 states and 983 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:24:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:48,741 INFO L93 Difference]: Finished difference Result 1889 states and 2572 transitions. [2022-11-16 12:24:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:24:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2022-11-16 12:24:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:48,747 INFO L225 Difference]: With dead ends: 1889 [2022-11-16 12:24:48,747 INFO L226 Difference]: Without dead ends: 1182 [2022-11-16 12:24:48,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:24:48,750 INFO L413 NwaCegarLoop]: 1152 mSDtfsCounter, 497 mSDsluCounter, 2944 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 4096 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:48,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 4096 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:24:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-11-16 12:24:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 727. [2022-11-16 12:24:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 560 states have (on average 1.3410714285714285) internal successors, (751), 565 states have internal predecessors, (751), 118 states have call successors, (118), 48 states have call predecessors, (118), 48 states have return successors, (118), 118 states have call predecessors, (118), 117 states have call successors, (118) [2022-11-16 12:24:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 987 transitions. [2022-11-16 12:24:48,816 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 987 transitions. Word has length 97 [2022-11-16 12:24:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:48,817 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 987 transitions. [2022-11-16 12:24:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:24:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 987 transitions. [2022-11-16 12:24:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-16 12:24:48,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:48,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-16 12:24:48,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:49,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:49,029 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:49,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1266842788, now seen corresponding path program 2 times [2022-11-16 12:24:49,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:49,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881092901] [2022-11-16 12:24:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:49,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:49,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:49,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:24:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:49,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:24:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 12:24:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881092901] [2022-11-16 12:24:49,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881092901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:24:49,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:24:49,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:24:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996143996] [2022-11-16 12:24:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:24:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:24:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:24:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:24:49,509 INFO L87 Difference]: Start difference. First operand 727 states and 987 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:24:53,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:55,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:57,023 INFO L93 Difference]: Finished difference Result 943 states and 1327 transitions. [2022-11-16 12:24:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:24:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 98 [2022-11-16 12:24:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:57,028 INFO L225 Difference]: With dead ends: 943 [2022-11-16 12:24:57,028 INFO L226 Difference]: Without dead ends: 940 [2022-11-16 12:24:57,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:24:57,030 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 999 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 297 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:57,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 925 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 789 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-16 12:24:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-11-16 12:24:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 731. [2022-11-16 12:24:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 563 states have (on average 1.3392539964476022) internal successors, (754), 568 states have internal predecessors, (754), 118 states have call successors, (118), 49 states have call predecessors, (118), 49 states have return successors, (118), 118 states have call predecessors, (118), 117 states have call successors, (118) [2022-11-16 12:24:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 990 transitions. [2022-11-16 12:24:57,092 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 990 transitions. Word has length 98 [2022-11-16 12:24:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:57,093 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 990 transitions. [2022-11-16 12:24:57,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:24:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 990 transitions. [2022-11-16 12:24:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-16 12:24:57,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:57,096 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-16 12:24:57,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:24:57,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash 856349729, now seen corresponding path program 1 times [2022-11-16 12:24:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:57,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099127180] [2022-11-16 12:24:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:24:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:24:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:24:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-16 12:24:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-16 12:24:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:24:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:24:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-16 12:24:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-16 12:24:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-16 12:24:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 12:24:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-16 12:24:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-16 12:24:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-16 12:24:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099127180] [2022-11-16 12:24:57,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099127180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:24:57,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:24:57,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:24:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418932303] [2022-11-16 12:24:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:24:57,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:24:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:24:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:24:57,850 INFO L87 Difference]: Start difference. First operand 731 states and 990 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-16 12:25:02,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:04,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:25:05,554 INFO L93 Difference]: Finished difference Result 1693 states and 2348 transitions. [2022-11-16 12:25:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:25:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 197 [2022-11-16 12:25:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:25:05,560 INFO L225 Difference]: With dead ends: 1693 [2022-11-16 12:25:05,560 INFO L226 Difference]: Without dead ends: 978 [2022-11-16 12:25:05,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:25:05,564 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 964 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 424 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:25:05,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 1294 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1618 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-11-16 12:25:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-16 12:25:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 732. [2022-11-16 12:25:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 564 states have (on average 1.3386524822695036) internal successors, (755), 569 states have internal predecessors, (755), 118 states have call successors, (118), 49 states have call predecessors, (118), 49 states have return successors, (118), 118 states have call predecessors, (118), 117 states have call successors, (118) [2022-11-16 12:25:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 991 transitions. [2022-11-16 12:25:05,632 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 991 transitions. Word has length 197 [2022-11-16 12:25:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:25:05,633 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 991 transitions. [2022-11-16 12:25:05,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-16 12:25:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 991 transitions. [2022-11-16 12:25:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-16 12:25:05,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:25:05,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-16 12:25:05,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:25:05,637 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:25:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:25:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash -722572167, now seen corresponding path program 1 times [2022-11-16 12:25:05,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:25:05,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244886626] [2022-11-16 12:25:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:25:05,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:25:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:25:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:25:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:25:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-16 12:25:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-16 12:25:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 12:25:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:25:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-16 12:25:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-16 12:25:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-16 12:25:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 12:25:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-16 12:25:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-11-16 12:25:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-11-16 12:25:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-16 12:25:06,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:25:06,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244886626] [2022-11-16 12:25:06,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244886626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:25:06,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075052864] [2022-11-16 12:25:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:25:06,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:25:06,648 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:25:06,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:25:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:07,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 4834 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:25:07,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:25:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 12:25:08,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:25:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:25:08,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075052864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:25:08,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:25:08,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-16 12:25:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185284716] [2022-11-16 12:25:08,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:25:08,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:25:08,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:25:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:25:08,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:25:08,338 INFO L87 Difference]: Start difference. First operand 732 states and 991 transitions. Second operand has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-16 12:25:19,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:26,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:28,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:25:30,434 INFO L93 Difference]: Finished difference Result 4742 states and 7128 transitions. [2022-11-16 12:25:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 12:25:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 207 [2022-11-16 12:25:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:25:30,451 INFO L225 Difference]: With dead ends: 4742 [2022-11-16 12:25:30,452 INFO L226 Difference]: Without dead ends: 4026 [2022-11-16 12:25:30,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 12:25:30,456 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 6678 mSDsluCounter, 3919 mSDsCounter, 0 mSdLazyCounter, 8736 mSolverCounterSat, 2644 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7049 SdHoareTripleChecker+Valid, 4467 SdHoareTripleChecker+Invalid, 11383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2644 IncrementalHoareTripleChecker+Valid, 8736 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:25:30,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7049 Valid, 4467 Invalid, 11383 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2644 Valid, 8736 Invalid, 3 Unknown, 0 Unchecked, 20.6s Time] [2022-11-16 12:25:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-11-16 12:25:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 799. [2022-11-16 12:25:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 630 states have (on average 1.3412698412698412) internal successors, (845), 635 states have internal predecessors, (845), 119 states have call successors, (119), 49 states have call predecessors, (119), 49 states have return successors, (119), 119 states have call predecessors, (119), 118 states have call successors, (119) [2022-11-16 12:25:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1083 transitions. [2022-11-16 12:25:30,623 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1083 transitions. Word has length 207 [2022-11-16 12:25:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:25:30,624 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1083 transitions. [2022-11-16 12:25:30,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-16 12:25:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1083 transitions. [2022-11-16 12:25:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-16 12:25:30,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:25:30,628 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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] [2022-11-16 12:25:30,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:25:30,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:30,835 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:25:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:25:30,835 INFO L85 PathProgramCache]: Analyzing trace with hash -836898767, now seen corresponding path program 2 times [2022-11-16 12:25:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:25:30,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282997378] [2022-11-16 12:25:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:25:30,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:25:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:25:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:25:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-16 12:25:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-16 12:25:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-16 12:25:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-16 12:25:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-11-16 12:25:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-16 12:25:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-11-16 12:25:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-16 12:25:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-11-16 12:25:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-11-16 12:25:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-11-16 12:25:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-11-16 12:25:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-11-16 12:25:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:25:32,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:25:32,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282997378] [2022-11-16 12:25:32,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282997378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:25:32,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257583907] [2022-11-16 12:25:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:25:32,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:25:32,771 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:25:32,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:25:34,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:25:34,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:25:34,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 5061 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:25:34,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:25:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 4 proven. 235 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 12:25:34,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:25:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:25:34,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257583907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:25:34,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:25:34,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 23 [2022-11-16 12:25:34,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126469077] [2022-11-16 12:25:34,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:25:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:25:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:25:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:25:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:25:34,740 INFO L87 Difference]: Start difference. First operand 799 states and 1083 transitions. Second operand has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-16 12:25:47,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:49,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:54,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:56,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:58,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:00,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:02,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:04,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:06,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:08,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:10,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:12,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:16,576 INFO L93 Difference]: Finished difference Result 6699 states and 10143 transitions. [2022-11-16 12:26:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:26:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 247 [2022-11-16 12:26:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:16,601 INFO L225 Difference]: With dead ends: 6699 [2022-11-16 12:26:16,601 INFO L226 Difference]: Without dead ends: 5916 [2022-11-16 12:26:16,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 552 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2442, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:26:16,606 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 11926 mSDsluCounter, 4317 mSDsCounter, 0 mSdLazyCounter, 8549 mSolverCounterSat, 4566 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12496 SdHoareTripleChecker+Valid, 4989 SdHoareTripleChecker+Invalid, 13127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4566 IncrementalHoareTripleChecker+Valid, 8549 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:16,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12496 Valid, 4989 Invalid, 13127 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4566 Valid, 8549 Invalid, 12 Unknown, 0 Unchecked, 39.6s Time] [2022-11-16 12:26:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5916 states. [2022-11-16 12:26:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5916 to 859. [2022-11-16 12:26:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 690 states have (on average 1.346376811594203) internal successors, (929), 695 states have internal predecessors, (929), 119 states have call successors, (119), 49 states have call predecessors, (119), 49 states have return successors, (119), 119 states have call predecessors, (119), 118 states have call successors, (119) [2022-11-16 12:26:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1167 transitions. [2022-11-16 12:26:16,834 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1167 transitions. Word has length 247 [2022-11-16 12:26:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:16,834 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1167 transitions. [2022-11-16 12:26:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-16 12:26:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1167 transitions. [2022-11-16 12:26:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-11-16 12:26:16,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:16,841 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 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] [2022-11-16 12:26:16,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:17,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06be1684-fc1e-422a-bf36-d6fcb1d417ef/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:17,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:26:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1095513711, now seen corresponding path program 3 times [2022-11-16 12:26:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:17,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192970989] [2022-11-16 12:26:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:17,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:26:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-16 12:26:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:26:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-16 12:26:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:26:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-11-16 12:26:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-11-16 12:26:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-16 12:26:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-11-16 12:26:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:26:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-11-16 12:26:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-11-16 12:26:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-11-16 12:26:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-11-16 12:26:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-11-16 12:26:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-11-16 12:26:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-11-16 12:26:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2022-11-16 12:26:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:26:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-11-16 12:26:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192970989] [2022-11-16 12:26:19,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192970989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:19,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:19,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:26:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913714217] [2022-11-16 12:26:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:19,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:26:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:26:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:26:19,409 INFO L87 Difference]: Start difference. First operand 859 states and 1167 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-16 12:26:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:20,298 INFO L93 Difference]: Finished difference Result 1435 states and 1991 transitions. [2022-11-16 12:26:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:26:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 277 [2022-11-16 12:26:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:20,300 INFO L225 Difference]: With dead ends: 1435 [2022-11-16 12:26:20,300 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 12:26:20,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:26:20,304 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 289 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:20,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 684 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:26:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 12:26:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 12:26:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 12:26:20,306 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 277 [2022-11-16 12:26:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:20,306 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:26:20,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-16 12:26:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 12:26:20,306 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 12:26:20,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 12:26:20,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:26:20,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 12:27:08,396 WARN L233 SmtUtils]: Spent 47.97s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:27:54,134 WARN L233 SmtUtils]: Spent 45.70s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:28:00,055 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 373 DAG size of output: 369 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:28:47,421 WARN L233 SmtUtils]: Spent 45.90s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:29:33,676 WARN L233 SmtUtils]: Spent 46.25s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)