./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF --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 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:31:45,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:31:45,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:31:45,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:31:45,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:31:45,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:31:45,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:31:45,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:31:45,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:31:45,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:31:45,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:31:45,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:31:45,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:31:45,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:31:45,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:31:45,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:31:45,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:31:45,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:31:45,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:31:45,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:31:45,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:31:45,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:31:45,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:31:45,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:31:45,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:31:45,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:31:45,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:31:45,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:31:45,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:31:45,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:31:45,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:31:45,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:31:45,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:31:45,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:31:45,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:31:45,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:31:45,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:31:45,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:31:45,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:31:45,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:31:45,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:31:45,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:31:45,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:31:45,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:31:45,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:31:45,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:31:45,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:31:45,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:31:45,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:31:45,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:31:45,990 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:31:45,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:31:45,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:31:45,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:31:45,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:31:45,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:31:45,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:31:45,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:31:45,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:31:45,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:31:45,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:31:45,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:31:45,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:31:45,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:31:45,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:31:45,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:31:45,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:31:45,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:31:45,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:31:45,995 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:31:45,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:31:45,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:31:45,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:31:45,997 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_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2021-11-20 06:31:46,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:31:46,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:31:46,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:31:46,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:31:46,359 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:31:46,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-20 06:31:46,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/data/b61744d97/9401c8ec5abf44ec9fe346692f8fb07e/FLAG39fe0712b [2021-11-20 06:31:47,288 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:31:47,289 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-20 06:31:47,341 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/data/b61744d97/9401c8ec5abf44ec9fe346692f8fb07e/FLAG39fe0712b [2021-11-20 06:31:47,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/data/b61744d97/9401c8ec5abf44ec9fe346692f8fb07e [2021-11-20 06:31:47,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:31:47,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:31:47,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:31:47,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:31:47,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:31:47,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:31:47" (1/1) ... [2021-11-20 06:31:47,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ecd79a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:47, skipping insertion in model container [2021-11-20 06:31:47,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:31:47" (1/1) ... [2021-11-20 06:31:47,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:31:47,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:31:49,281 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-20 06:31:49,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:31:49,355 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:31:49,730 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-20 06:31:49,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:31:49,816 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:31:49,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49 WrapperNode [2021-11-20 06:31:49,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:31:49,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:31:49,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:31:49,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:31:49,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:49,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,119 INFO L137 Inliner]: procedures = 186, calls = 1465, calls flagged for inlining = 91, calls inlined = 88, statements flattened = 4139 [2021-11-20 06:31:50,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:31:50,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:31:50,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:31:50,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:31:50,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:31:50,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:31:50,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:31:50,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:31:50,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (1/1) ... [2021-11-20 06:31:50,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:31:50,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:50,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:31:50,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:31:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_sw [2021-11-20 06:31:50,550 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_sw [2021-11-20 06:31:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_file_remove [2021-11-20 06:31:50,550 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_file_remove [2021-11-20 06:31:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 06:31:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-20 06:31:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-20 06:31:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2021-11-20 06:31:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2021-11-20 06:31:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_find_numid [2021-11-20 06:31:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_find_numid [2021-11-20 06:31:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv [2021-11-20 06:31:50,552 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv [2021-11-20 06:31:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:31:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-20 06:31:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-20 06:31:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_input [2021-11-20 06:31:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_input [2021-11-20 06:31:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 06:31:50,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 06:31:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-20 06:31:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 06:31:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 06:31:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_test_id [2021-11-20 06:31:50,554 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_test_id [2021-11-20 06:31:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:31:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-20 06:31:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-20 06:31:50,555 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-20 06:31:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-20 06:31:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 06:31:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 06:31:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_vol [2021-11-20 06:31:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_vol [2021-11-20 06:31:50,556 INFO L130 BoogieDeclarations]: Found specification of procedure snd_info_free_entry [2021-11-20 06:31:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_info_free_entry [2021-11-20 06:31:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 06:31:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 06:31:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 06:31:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 06:31:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_release [2021-11-20 06:31:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_release [2021-11-20 06:31:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:31:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv2 [2021-11-20 06:31:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv2 [2021-11-20 06:31:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv1 [2021-11-20 06:31:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv1 [2021-11-20 06:31:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-20 06:31:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2021-11-20 06:31:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2021-11-20 06:31:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:31:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_held [2021-11-20 06:31:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_held [2021-11-20 06:31:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-20 06:31:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-20 06:31:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:31:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:31:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-20 06:31:50,564 INFO L130 BoogieDeclarations]: Found specification of procedure mixer_slot_clear [2021-11-20 06:31:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure mixer_slot_clear [2021-11-20 06:31:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_notify [2021-11-20 06:31:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_notify [2021-11-20 06:31:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 06:31:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 06:31:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_ioctl1 [2021-11-20 06:31:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_ioctl1 [2021-11-20 06:31:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2021-11-20 06:31:50,567 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2021-11-20 06:31:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-20 06:31:50,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-20 06:31:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:31:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-20 06:31:50,568 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-20 06:31:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-20 06:31:50,568 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-20 06:31:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_sw [2021-11-20 06:31:50,568 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_sw [2021-11-20 06:31:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-20 06:31:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-20 06:31:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:31:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:31:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_test [2021-11-20 06:31:50,570 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_test [2021-11-20 06:31:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-20 06:31:50,571 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-20 06:31:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-20 06:31:50,571 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-20 06:31:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure snd_oss_info_register [2021-11-20 06:31:50,572 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_oss_info_register [2021-11-20 06:31:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_vol [2021-11-20 06:31:50,572 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_vol [2021-11-20 06:31:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_notify_handler [2021-11-20 06:31:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_notify_handler [2021-11-20 06:31:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-20 06:31:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-20 06:31:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-20 06:31:50,575 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-20 06:31:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 06:31:50,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 06:31:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_dereference [2021-11-20 06:31:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_dereference [2021-11-20 06:31:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_open [2021-11-20 06:31:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_open [2021-11-20 06:31:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:31:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-20 06:31:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-20 06:31:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:31:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:31:51,236 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:31:51,242 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:32:03,283 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:32:03,303 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:32:03,303 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:32:03,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:32:03 BoogieIcfgContainer [2021-11-20 06:32:03,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:32:03,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:32:03,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:32:03,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:32:03,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:31:47" (1/3) ... [2021-11-20 06:32:03,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f89b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:32:03, skipping insertion in model container [2021-11-20 06:32:03,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:31:49" (2/3) ... [2021-11-20 06:32:03,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f89b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:32:03, skipping insertion in model container [2021-11-20 06:32:03,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:32:03" (3/3) ... [2021-11-20 06:32:03,325 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-20 06:32:03,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:32:03,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:32:03,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:32:03,403 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:32:03,403 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:32:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 1195 states, 892 states have (on average 1.4663677130044843) internal successors, (1308), 909 states have internal predecessors, (1308), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) [2021-11-20 06:32:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:32:03,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:03,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:32:03,466 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1121566205, now seen corresponding path program 1 times [2021-11-20 06:32:03,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523592150] [2021-11-20 06:32:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:03,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:04,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:32:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:04,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523592150] [2021-11-20 06:32:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523592150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:32:04,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:32:04,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:32:04,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509305373] [2021-11-20 06:32:04,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:32:04,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:32:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:32:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:04,142 INFO L87 Difference]: Start difference. First operand has 1195 states, 892 states have (on average 1.4663677130044843) internal successors, (1308), 909 states have internal predecessors, (1308), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:32:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:04,440 INFO L93 Difference]: Finished difference Result 2330 states and 3667 transitions. [2021-11-20 06:32:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:32:04,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 06:32:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:04,497 INFO L225 Difference]: With dead ends: 2330 [2021-11-20 06:32:04,497 INFO L226 Difference]: Without dead ends: 1136 [2021-11-20 06:32:04,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:04,529 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 5 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:04,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3413 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:32:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-20 06:32:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1131. [2021-11-20 06:32:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 839 states have (on average 1.4505363528009536) internal successors, (1217), 852 states have internal predecessors, (1217), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-20 06:32:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1708 transitions. [2021-11-20 06:32:04,739 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1708 transitions. Word has length 14 [2021-11-20 06:32:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:04,740 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1708 transitions. [2021-11-20 06:32:04,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:32:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1708 transitions. [2021-11-20 06:32:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:32:04,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:04,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:32:04,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:32:04,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash 645647086, now seen corresponding path program 1 times [2021-11-20 06:32:04,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:04,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963784224] [2021-11-20 06:32:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:04,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:04,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:32:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:04,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963784224] [2021-11-20 06:32:04,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963784224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:32:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025188331] [2021-11-20 06:32:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:04,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:32:04,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:32:04,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:32:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:32:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:05,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:05,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025188331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:05,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:32:05,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:32:05,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719832443] [2021-11-20 06:32:05,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:05,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:32:05,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:32:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:32:05,800 INFO L87 Difference]: Start difference. First operand 1131 states and 1708 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:32:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:06,095 INFO L93 Difference]: Finished difference Result 2268 states and 3427 transitions. [2021-11-20 06:32:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:32:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-20 06:32:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:06,108 INFO L225 Difference]: With dead ends: 2268 [2021-11-20 06:32:06,109 INFO L226 Difference]: Without dead ends: 1149 [2021-11-20 06:32:06,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:32:06,117 INFO L933 BasicCegarLoop]: 1706 mSDtfsCounter, 24 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5110 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:06,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 5110 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:32:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-20 06:32:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2021-11-20 06:32:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 854 states have (on average 1.446135831381733) internal successors, (1235), 867 states have internal predecessors, (1235), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-20 06:32:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1732 transitions. [2021-11-20 06:32:06,245 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1732 transitions. Word has length 18 [2021-11-20 06:32:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1732 transitions. [2021-11-20 06:32:06,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:32:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1732 transitions. [2021-11-20 06:32:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:32:06,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:06,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:32:06,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:32:06,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:06,478 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1066609489, now seen corresponding path program 2 times [2021-11-20 06:32:06,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:06,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761999721] [2021-11-20 06:32:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:06,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:06,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:32:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:32:06,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:06,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761999721] [2021-11-20 06:32:06,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761999721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:32:06,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:32:06,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:32:06,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711006587] [2021-11-20 06:32:06,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:32:06,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:32:06,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:32:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:32:06,671 INFO L87 Difference]: Start difference. First operand 1149 states and 1732 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:32:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:06,850 INFO L93 Difference]: Finished difference Result 1154 states and 1736 transitions. [2021-11-20 06:32:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:32:06,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-20 06:32:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:06,864 INFO L225 Difference]: With dead ends: 1154 [2021-11-20 06:32:06,864 INFO L226 Difference]: Without dead ends: 1149 [2021-11-20 06:32:06,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:32:06,870 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 75 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 5021 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:06,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 5021 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:32:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-20 06:32:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2021-11-20 06:32:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 854 states have (on average 1.4449648711943794) internal successors, (1234), 867 states have internal predecessors, (1234), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-20 06:32:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1731 transitions. [2021-11-20 06:32:06,959 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1731 transitions. Word has length 30 [2021-11-20 06:32:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:06,960 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1731 transitions. [2021-11-20 06:32:06,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:32:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1731 transitions. [2021-11-20 06:32:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:32:06,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:06,971 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:32:06,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:32:06,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash 330312657, now seen corresponding path program 1 times [2021-11-20 06:32:06,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:06,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867735257] [2021-11-20 06:32:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:06,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:07,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:32:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:07,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:32:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:32:07,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867735257] [2021-11-20 06:32:07,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867735257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:32:07,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:32:07,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:32:07,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834309723] [2021-11-20 06:32:07,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:32:07,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:32:07,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:32:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:07,148 INFO L87 Difference]: Start difference. First operand 1149 states and 1731 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:32:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:07,239 INFO L93 Difference]: Finished difference Result 1161 states and 1745 transitions. [2021-11-20 06:32:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:32:07,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-11-20 06:32:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:07,251 INFO L225 Difference]: With dead ends: 1161 [2021-11-20 06:32:07,251 INFO L226 Difference]: Without dead ends: 1155 [2021-11-20 06:32:07,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:07,262 INFO L933 BasicCegarLoop]: 1703 mSDtfsCounter, 5 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3403 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:07,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3403 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:32:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-11-20 06:32:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1150. [2021-11-20 06:32:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 855 states have (on average 1.4444444444444444) internal successors, (1235), 868 states have internal predecessors, (1235), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-20 06:32:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1732 transitions. [2021-11-20 06:32:07,330 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1732 transitions. Word has length 38 [2021-11-20 06:32:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:07,331 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1732 transitions. [2021-11-20 06:32:07,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:32:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1732 transitions. [2021-11-20 06:32:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:32:07,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:07,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-20 06:32:07,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:32:07,337 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash 631398726, now seen corresponding path program 1 times [2021-11-20 06:32:07,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:07,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774849311] [2021-11-20 06:32:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:07,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:07,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:32:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:07,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:32:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:32:07,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:07,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774849311] [2021-11-20 06:32:07,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774849311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:32:07,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:32:07,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:32:07,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578634944] [2021-11-20 06:32:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:32:07,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:32:07,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:32:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:07,564 INFO L87 Difference]: Start difference. First operand 1150 states and 1732 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:32:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:07,992 INFO L93 Difference]: Finished difference Result 1925 states and 2934 transitions. [2021-11-20 06:32:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:32:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-11-20 06:32:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:08,016 INFO L225 Difference]: With dead ends: 1925 [2021-11-20 06:32:08,016 INFO L226 Difference]: Without dead ends: 1918 [2021-11-20 06:32:08,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:08,019 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 1110 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 3527 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:08,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 3527 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:32:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-20 06:32:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2021-11-20 06:32:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1464 states have (on average 1.4576502732240437) internal successors, (2134), 1486 states have internal predecessors, (2134), 376 states have call successors, (376), 78 states have call predecessors, (376), 75 states have return successors, (414), 366 states have call predecessors, (414), 373 states have call successors, (414) [2021-11-20 06:32:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2924 transitions. [2021-11-20 06:32:08,157 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2924 transitions. Word has length 42 [2021-11-20 06:32:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:08,162 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2924 transitions. [2021-11-20 06:32:08,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:32:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2924 transitions. [2021-11-20 06:32:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 06:32:08,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:08,171 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-20 06:32:08,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:32:08,172 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash 492616272, now seen corresponding path program 1 times [2021-11-20 06:32:08,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:08,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077378729] [2021-11-20 06:32:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:08,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:32:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:32:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:32:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:32:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:32:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:32:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:32:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:32:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:32:08,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077378729] [2021-11-20 06:32:08,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077378729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:32:08,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:32:08,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:32:08,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799994241] [2021-11-20 06:32:08,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:32:08,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:32:08,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:32:08,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:32:08,863 INFO L87 Difference]: Start difference. First operand 1916 states and 2924 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:32:12,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:32:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:29,839 INFO L93 Difference]: Finished difference Result 4493 states and 7130 transitions. [2021-11-20 06:32:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:32:29,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 88 [2021-11-20 06:32:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:29,877 INFO L225 Difference]: With dead ends: 4493 [2021-11-20 06:32:29,877 INFO L226 Difference]: Without dead ends: 2632 [2021-11-20 06:32:29,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:32:29,893 INFO L933 BasicCegarLoop]: 1891 mSDtfsCounter, 2486 mSDsluCounter, 9600 mSDsCounter, 0 mSdLazyCounter, 4886 mSolverCounterSat, 1058 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2616 SdHoareTripleChecker+Valid, 11491 SdHoareTripleChecker+Invalid, 5945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 4886 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:29,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2616 Valid, 11491 Invalid, 5945 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1058 Valid, 4886 Invalid, 1 Unknown, 0 Unchecked, 19.5s Time] [2021-11-20 06:32:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-11-20 06:32:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2152. [2021-11-20 06:32:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1651 states have (on average 1.4470018170805572) internal successors, (2389), 1671 states have internal predecessors, (2389), 415 states have call successors, (415), 78 states have call predecessors, (415), 85 states have return successors, (531), 417 states have call predecessors, (531), 412 states have call successors, (531) [2021-11-20 06:32:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3335 transitions. [2021-11-20 06:32:30,058 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3335 transitions. Word has length 88 [2021-11-20 06:32:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:30,059 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3335 transitions. [2021-11-20 06:32:30,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:32:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3335 transitions. [2021-11-20 06:32:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 06:32:30,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:30,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-20 06:32:30,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:32:30,068 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1386102610, now seen corresponding path program 1 times [2021-11-20 06:32:30,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:30,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053368082] [2021-11-20 06:32:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:30,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:32:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:32:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:32:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:32:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:32:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:32:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:32:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:32:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:32:30,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053368082] [2021-11-20 06:32:30,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053368082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:32:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44618660] [2021-11-20 06:32:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:30,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:30,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:32:30,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:32:30,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:32:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:31,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:32:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:32:31,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:32:32,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44618660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:32,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:32:32,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2021-11-20 06:32:32,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418523523] [2021-11-20 06:32:32,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:32,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:32:32,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:32:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:32:32,167 INFO L87 Difference]: Start difference. First operand 2152 states and 3335 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:32:35,191 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:32:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:43,992 INFO L93 Difference]: Finished difference Result 4797 states and 7649 transitions. [2021-11-20 06:32:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:32:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2021-11-20 06:32:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:44,023 INFO L225 Difference]: With dead ends: 4797 [2021-11-20 06:32:44,023 INFO L226 Difference]: Without dead ends: 2696 [2021-11-20 06:32:44,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:32:44,039 INFO L933 BasicCegarLoop]: 1766 mSDtfsCounter, 1887 mSDsluCounter, 5752 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 934 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 7518 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 934 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:44,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1996 Valid, 7518 Invalid, 3566 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [934 Valid, 2631 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2021-11-20 06:32:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-11-20 06:32:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2224. [2021-11-20 06:32:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1711 states have (on average 1.4383401519579193) internal successors, (2461), 1731 states have internal predecessors, (2461), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-20 06:32:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3443 transitions. [2021-11-20 06:32:44,192 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3443 transitions. Word has length 88 [2021-11-20 06:32:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:44,193 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3443 transitions. [2021-11-20 06:32:44,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:32:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3443 transitions. [2021-11-20 06:32:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 06:32:44,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:44,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:32:44,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:32:44,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:44,426 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1024798374, now seen corresponding path program 1 times [2021-11-20 06:32:44,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:44,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053464089] [2021-11-20 06:32:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:44,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:44,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:32:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565937051] [2021-11-20 06:32:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:44,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:44,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:32:44,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:32:44,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:32:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:32:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:32:45,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:32:45,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:45,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053464089] [2021-11-20 06:32:45,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:32:45,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565937051] [2021-11-20 06:32:45,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565937051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:32:45,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:32:45,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:32:45,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622829122] [2021-11-20 06:32:45,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:32:45,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:32:45,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:32:45,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:45,491 INFO L87 Difference]: Start difference. First operand 2224 states and 3443 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:32:47,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:32:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:47,626 INFO L93 Difference]: Finished difference Result 4443 states and 6929 transitions. [2021-11-20 06:32:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:32:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2021-11-20 06:32:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:47,684 INFO L225 Difference]: With dead ends: 4443 [2021-11-20 06:32:47,684 INFO L226 Difference]: Without dead ends: 2228 [2021-11-20 06:32:47,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:32:47,705 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:47,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 3405 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:32:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-11-20 06:32:47,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2226. [2021-11-20 06:32:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 1713 states have (on average 1.4378283712784588) internal successors, (2463), 1733 states have internal predecessors, (2463), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-20 06:32:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3445 transitions. [2021-11-20 06:32:47,857 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3445 transitions. Word has length 92 [2021-11-20 06:32:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:47,858 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 3445 transitions. [2021-11-20 06:32:47,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:32:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3445 transitions. [2021-11-20 06:32:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:32:47,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:47,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 06:32:47,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:32:48,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:48,082 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:48,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1125315305, now seen corresponding path program 1 times [2021-11-20 06:32:48,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:48,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646581571] [2021-11-20 06:32:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:48,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:48,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:32:48,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557807564] [2021-11-20 06:32:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:48,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:32:48,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:32:48,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:32:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:48,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:32:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:32:49,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:32:49,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:32:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646581571] [2021-11-20 06:32:49,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:32:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557807564] [2021-11-20 06:32:49,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557807564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:49,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:32:49,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 06:32:49,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213359012] [2021-11-20 06:32:49,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:49,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:32:49,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:49,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:32:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:32:49,583 INFO L87 Difference]: Start difference. First operand 2226 states and 3445 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 06:32:51,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:32:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:51,778 INFO L93 Difference]: Finished difference Result 4455 states and 6945 transitions. [2021-11-20 06:32:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:32:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 98 [2021-11-20 06:32:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:51,816 INFO L225 Difference]: With dead ends: 4455 [2021-11-20 06:32:51,816 INFO L226 Difference]: Without dead ends: 2238 [2021-11-20 06:32:51,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:32:51,836 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 6 mSDsluCounter, 3402 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5106 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:51,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 5106 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:32:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-11-20 06:32:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2238. [2021-11-20 06:32:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 1725 states have (on average 1.434782608695652) internal successors, (2475), 1745 states have internal predecessors, (2475), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-20 06:32:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 3457 transitions. [2021-11-20 06:32:51,992 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 3457 transitions. Word has length 98 [2021-11-20 06:32:51,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:51,992 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 3457 transitions. [2021-11-20 06:32:51,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 06:32:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 3457 transitions. [2021-11-20 06:32:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:32:51,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:51,998 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-20 06:32:52,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:32:52,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:32:52,214 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:32:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 692597909, now seen corresponding path program 2 times [2021-11-20 06:32:52,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:32:52,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71948356] [2021-11-20 06:32:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:52,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:32:52,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:32:52,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092760228] [2021-11-20 06:32:52,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:32:52,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:32:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:32:52,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:32:52,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:33:31,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:33:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:33:31,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:33:31,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:33:32,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:33:32,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:32,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71948356] [2021-11-20 06:33:32,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:33:32,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092760228] [2021-11-20 06:33:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092760228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:32,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:32,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:33:32,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414010679] [2021-11-20 06:33:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:32,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:33:32,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:33:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:33:32,439 INFO L87 Difference]: Start difference. First operand 2238 states and 3457 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:33:34,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:33:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:34,731 INFO L93 Difference]: Finished difference Result 4475 states and 6982 transitions. [2021-11-20 06:33:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:33:34,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-20 06:33:34,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:34,752 INFO L225 Difference]: With dead ends: 4475 [2021-11-20 06:33:34,752 INFO L226 Difference]: Without dead ends: 2246 [2021-11-20 06:33:34,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:33:34,769 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 5 mSDsluCounter, 3398 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5106 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:34,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 5106 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:33:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-11-20 06:33:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2242. [2021-11-20 06:33:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1729 states have (on average 1.4337767495662233) internal successors, (2479), 1749 states have internal predecessors, (2479), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-20 06:33:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3461 transitions. [2021-11-20 06:33:34,904 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3461 transitions. Word has length 104 [2021-11-20 06:33:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:34,905 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3461 transitions. [2021-11-20 06:33:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:33:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3461 transitions. [2021-11-20 06:33:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 06:33:34,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:34,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1] [2021-11-20 06:33:35,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:33:35,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:35,126 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1472243980, now seen corresponding path program 1 times [2021-11-20 06:33:35,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:35,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548527559] [2021-11-20 06:33:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:35,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:35,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:33:35,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781014688] [2021-11-20 06:33:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:35,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:35,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:35,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:33:35,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:33:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 2142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:33:35,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:33:36,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:33:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:33:36,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:36,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548527559] [2021-11-20 06:33:36,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:33:36,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781014688] [2021-11-20 06:33:36,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781014688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:33:36,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:33:36,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 06:33:36,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100158579] [2021-11-20 06:33:36,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:33:36,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:33:36,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:33:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:33:36,871 INFO L87 Difference]: Start difference. First operand 2242 states and 3461 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:33:39,016 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:33:41,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:33:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:41,149 INFO L93 Difference]: Finished difference Result 4499 states and 6995 transitions. [2021-11-20 06:33:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:33:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 119 [2021-11-20 06:33:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:41,221 INFO L225 Difference]: With dead ends: 4499 [2021-11-20 06:33:41,222 INFO L226 Difference]: Without dead ends: 2266 [2021-11-20 06:33:41,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:33:41,241 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 10 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6807 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:41,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6807 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 06:33:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-11-20 06:33:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2266. [2021-11-20 06:33:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 1753 states have (on average 1.4278379920136908) internal successors, (2503), 1773 states have internal predecessors, (2503), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-20 06:33:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 3485 transitions. [2021-11-20 06:33:41,363 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 3485 transitions. Word has length 119 [2021-11-20 06:33:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:41,364 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 3485 transitions. [2021-11-20 06:33:41,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:33:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 3485 transitions. [2021-11-20 06:33:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:33:41,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:41,371 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2021-11-20 06:33:41,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:33:41,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:33:41,598 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:41,598 INFO L85 PathProgramCache]: Analyzing trace with hash -394245464, now seen corresponding path program 1 times [2021-11-20 06:33:41,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:41,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23356243] [2021-11-20 06:33:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:41,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:33:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:33:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:33:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:33:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:33:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:33:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:33:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:33:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:33:42,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23356243] [2021-11-20 06:33:42,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23356243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:33:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193556520] [2021-11-20 06:33:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:42,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:42,466 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:33:42,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:33:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:33:43,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:33:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:33:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:33:45,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193556520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:33:45,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:33:45,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2021-11-20 06:33:45,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863846152] [2021-11-20 06:33:45,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:33:45,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:33:45,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:45,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:33:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:33:45,129 INFO L87 Difference]: Start difference. First operand 2266 states and 3485 transitions. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:33:49,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:02,842 INFO L93 Difference]: Finished difference Result 5025 states and 7961 transitions. [2021-11-20 06:34:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:34:02,842 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-11-20 06:34:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:02,875 INFO L225 Difference]: With dead ends: 5025 [2021-11-20 06:34:02,876 INFO L226 Difference]: Without dead ends: 2882 [2021-11-20 06:34:02,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:34:02,887 INFO L933 BasicCegarLoop]: 1814 mSDtfsCounter, 1962 mSDsluCounter, 10401 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 987 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 12215 SdHoareTripleChecker+Invalid, 5274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 987 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:02,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 12215 Invalid, 5274 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [987 Valid, 4286 Invalid, 1 Unknown, 0 Unchecked, 17.3s Time] [2021-11-20 06:34:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-11-20 06:34:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2410. [2021-11-20 06:34:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 1873 states have (on average 1.4132407901761879) internal successors, (2647), 1893 states have internal predecessors, (2647), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-20 06:34:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3701 transitions. [2021-11-20 06:34:03,044 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3701 transitions. Word has length 111 [2021-11-20 06:34:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:03,045 INFO L470 AbstractCegarLoop]: Abstraction has 2410 states and 3701 transitions. [2021-11-20 06:34:03,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:34:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3701 transitions. [2021-11-20 06:34:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 06:34:03,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:03,051 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:03,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:03,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:34:03,278 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash -372113542, now seen corresponding path program 1 times [2021-11-20 06:34:03,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:03,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41498421] [2021-11-20 06:34:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:03,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:03,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:34:03,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161401021] [2021-11-20 06:34:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:03,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:03,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:03,348 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:03,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:34:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:04,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:34:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:34:04,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:34:06,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:06,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41498421] [2021-11-20 06:34:06,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:34:06,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161401021] [2021-11-20 06:34:06,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161401021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:06,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:34:06,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-20 06:34:06,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674488745] [2021-11-20 06:34:06,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:06,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:34:06,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:06,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:34:06,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:34:06,049 INFO L87 Difference]: Start difference. First operand 2410 states and 3701 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:34:08,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:10,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:12,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:14,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:14,468 INFO L93 Difference]: Finished difference Result 4859 states and 7559 transitions. [2021-11-20 06:34:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:34:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 123 [2021-11-20 06:34:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:14,503 INFO L225 Difference]: With dead ends: 4859 [2021-11-20 06:34:14,503 INFO L226 Difference]: Without dead ends: 2458 [2021-11-20 06:34:14,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:34:14,518 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 22 mSDsluCounter, 8505 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10209 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:14,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 10209 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 4 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 06:34:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-11-20 06:34:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2458. [2021-11-20 06:34:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1921 states have (on average 1.4029151483602291) internal successors, (2695), 1941 states have internal predecessors, (2695), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-20 06:34:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3749 transitions. [2021-11-20 06:34:14,664 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3749 transitions. Word has length 123 [2021-11-20 06:34:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:14,665 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 3749 transitions. [2021-11-20 06:34:14,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:34:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3749 transitions. [2021-11-20 06:34:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:34:14,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:14,676 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 3, 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, 1, 1] [2021-11-20 06:34:14,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:14,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:34:14,902 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1685848428, now seen corresponding path program 2 times [2021-11-20 06:34:14,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:14,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243389913] [2021-11-20 06:34:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:14,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:14,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:34:14,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137171068] [2021-11-20 06:34:14,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:34:14,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:14,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:14,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:34:15,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:34:15,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2250 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:34:15,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:34:18,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:34:19,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243389913] [2021-11-20 06:34:19,982 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:34:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137171068] [2021-11-20 06:34:19,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137171068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:19,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:34:19,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 34 [2021-11-20 06:34:19,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94291171] [2021-11-20 06:34:19,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:19,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:34:19,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:34:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:34:19,987 INFO L87 Difference]: Start difference. First operand 2458 states and 3749 transitions. Second operand has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:34:22,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:24,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:24,619 INFO L93 Difference]: Finished difference Result 4947 states and 7643 transitions. [2021-11-20 06:34:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:34:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 155 [2021-11-20 06:34:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:24,642 INFO L225 Difference]: With dead ends: 4947 [2021-11-20 06:34:24,643 INFO L226 Difference]: Without dead ends: 2498 [2021-11-20 06:34:24,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:34:24,659 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 32 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6807 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:24,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 6807 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 06:34:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-11-20 06:34:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2498. [2021-11-20 06:34:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1961 states have (on average 1.3946965833758287) internal successors, (2735), 1981 states have internal predecessors, (2735), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-20 06:34:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3789 transitions. [2021-11-20 06:34:24,801 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3789 transitions. Word has length 155 [2021-11-20 06:34:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:24,802 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 3789 transitions. [2021-11-20 06:34:24,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:34:24,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3789 transitions. [2021-11-20 06:34:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 06:34:24,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:24,817 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 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] [2021-11-20 06:34:24,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:25,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:34:25,046 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:25,046 INFO L85 PathProgramCache]: Analyzing trace with hash -508063359, now seen corresponding path program 1 times [2021-11-20 06:34:25,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:25,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817718227] [2021-11-20 06:34:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:25,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:26,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:34:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:34:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:34:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:34:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:27,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-20 06:34:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:27,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 06:34:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:27,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:34:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:34:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:34:27,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817718227] [2021-11-20 06:34:27,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817718227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:34:27,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35280996] [2021-11-20 06:34:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:27,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:27,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:27,222 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:27,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:34:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:27,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:34:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 2 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:34:29,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:34:31,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35280996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:31,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:34:31,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 37 [2021-11-20 06:34:31,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205704034] [2021-11-20 06:34:31,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:31,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:34:31,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:31,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:34:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:34:31,262 INFO L87 Difference]: Start difference. First operand 2498 states and 3789 transitions. Second operand has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:34:35,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:46,593 INFO L93 Difference]: Finished difference Result 5321 states and 8313 transitions. [2021-11-20 06:34:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 06:34:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2021-11-20 06:34:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:46,617 INFO L225 Difference]: With dead ends: 5321 [2021-11-20 06:34:46,617 INFO L226 Difference]: Without dead ends: 3090 [2021-11-20 06:34:46,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:34:46,628 INFO L933 BasicCegarLoop]: 1915 mSDtfsCounter, 1982 mSDsluCounter, 5863 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 1173 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2135 SdHoareTripleChecker+Valid, 7778 SdHoareTripleChecker+Invalid, 4366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:46,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2135 Valid, 7778 Invalid, 4366 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1173 Valid, 3192 Invalid, 1 Unknown, 0 Unchecked, 14.8s Time] [2021-11-20 06:34:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-11-20 06:34:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2618. [2021-11-20 06:34:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2061 states have (on average 1.3852498786996603) internal successors, (2855), 2081 states have internal predecessors, (2855), 471 states have call successors, (471), 78 states have call predecessors, (471), 85 states have return successors, (643), 473 states have call predecessors, (643), 468 states have call successors, (643) [2021-11-20 06:34:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3969 transitions. [2021-11-20 06:34:46,786 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3969 transitions. Word has length 161 [2021-11-20 06:34:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:46,786 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 3969 transitions. [2021-11-20 06:34:46,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:34:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3969 transitions. [2021-11-20 06:34:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 06:34:46,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:46,800 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:46,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:47,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:47,014 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1277498002, now seen corresponding path program 2 times [2021-11-20 06:34:47,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:47,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565261790] [2021-11-20 06:34:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:47,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:47,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:34:47,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896362382] [2021-11-20 06:34:47,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:34:47,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:47,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:47,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:34:47,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:34:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:47,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2292 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:34:47,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-20 06:34:49,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:34:49,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:49,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565261790] [2021-11-20 06:34:49,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:34:49,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896362382] [2021-11-20 06:34:49,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896362382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:49,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:49,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:34:49,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223913196] [2021-11-20 06:34:49,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:49,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:34:49,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:49,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:34:49,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:34:49,488 INFO L87 Difference]: Start difference. First operand 2618 states and 3969 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:34:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:58,567 INFO L93 Difference]: Finished difference Result 2972 states and 4496 transitions. [2021-11-20 06:34:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:34:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 167 [2021-11-20 06:34:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:58,587 INFO L225 Difference]: With dead ends: 2972 [2021-11-20 06:34:58,587 INFO L226 Difference]: Without dead ends: 2969 [2021-11-20 06:34:58,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:34:58,590 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 3377 mSDsluCounter, 2313 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 4060 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:58,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 4060 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2021-11-20 06:34:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2021-11-20 06:34:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 2962. [2021-11-20 06:34:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2328 states have (on average 1.3964776632302405) internal successors, (3251), 2355 states have internal predecessors, (3251), 527 states have call successors, (527), 100 states have call predecessors, (527), 106 states have return successors, (707), 526 states have call predecessors, (707), 524 states have call successors, (707) [2021-11-20 06:34:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4485 transitions. [2021-11-20 06:34:58,738 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4485 transitions. Word has length 167 [2021-11-20 06:34:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:58,739 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 4485 transitions. [2021-11-20 06:34:58,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:34:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4485 transitions. [2021-11-20 06:34:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-20 06:34:58,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:58,750 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:58,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:58,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:58,966 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1756424649, now seen corresponding path program 1 times [2021-11-20 06:34:58,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654059745] [2021-11-20 06:34:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:58,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:59,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:34:59,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29925234] [2021-11-20 06:34:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:59,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:59,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:59,006 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:59,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:34:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:59,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2410 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:34:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:35:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2021-11-20 06:35:00,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:35:00,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:00,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654059745] [2021-11-20 06:35:00,976 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:35:00,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29925234] [2021-11-20 06:35:00,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29925234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:00,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:00,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:35:00,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082501757] [2021-11-20 06:35:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:00,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:35:00,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:35:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:35:00,978 INFO L87 Difference]: Start difference. First operand 2962 states and 4485 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 06:35:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:01,123 INFO L93 Difference]: Finished difference Result 2964 states and 4486 transitions. [2021-11-20 06:35:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:35:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 192 [2021-11-20 06:35:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:01,139 INFO L225 Difference]: With dead ends: 2964 [2021-11-20 06:35:01,139 INFO L226 Difference]: Without dead ends: 2961 [2021-11-20 06:35:01,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:35:01,141 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 1595 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:01,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 1702 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:35:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-11-20 06:35:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2949. [2021-11-20 06:35:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2324 states have (on average 1.3967297762478486) internal successors, (3246), 2345 states have internal predecessors, (3246), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2021-11-20 06:35:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4463 transitions. [2021-11-20 06:35:01,284 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4463 transitions. Word has length 192 [2021-11-20 06:35:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:01,285 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4463 transitions. [2021-11-20 06:35:01,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 06:35:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4463 transitions. [2021-11-20 06:35:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-20 06:35:01,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:01,312 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:01,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:35:01,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:35:01,526 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1625806616, now seen corresponding path program 1 times [2021-11-20 06:35:01,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:01,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588758123] [2021-11-20 06:35:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:01,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:35:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:35:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:35:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:35:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:35:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:35:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:35:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:35:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:35:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:35:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-11-20 06:35:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:35:01,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588758123] [2021-11-20 06:35:01,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588758123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:01,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:01,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:35:01,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49818333] [2021-11-20 06:35:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:01,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:35:01,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:35:01,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:35:01,963 INFO L87 Difference]: Start difference. First operand 2949 states and 4463 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:35:04,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:35:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:13,150 INFO L93 Difference]: Finished difference Result 6161 states and 9614 transitions. [2021-11-20 06:35:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:35:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 258 [2021-11-20 06:35:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:13,168 INFO L225 Difference]: With dead ends: 6161 [2021-11-20 06:35:13,169 INFO L226 Difference]: Without dead ends: 3603 [2021-11-20 06:35:13,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:35:13,178 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 1830 mSDsluCounter, 3000 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 888 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 4692 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:13,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1942 Valid, 4692 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 2119 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2021-11-20 06:35:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-11-20 06:35:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2949. [2021-11-20 06:35:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2324 states have (on average 1.3941480206540446) internal successors, (3240), 2345 states have internal predecessors, (3240), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2021-11-20 06:35:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4457 transitions. [2021-11-20 06:35:13,335 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4457 transitions. Word has length 258 [2021-11-20 06:35:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:13,336 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4457 transitions. [2021-11-20 06:35:13,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:35:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4457 transitions. [2021-11-20 06:35:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-20 06:35:13,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:13,363 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:13,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:35:13,363 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1160302493, now seen corresponding path program 1 times [2021-11-20 06:35:13,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852460738] [2021-11-20 06:35:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:13,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:13,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:35:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:13,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:35:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:35:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:13,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:35:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:35:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:35:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:35:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:35:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:35:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:35:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2021-11-20 06:35:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2021-11-20 06:35:14,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852460738] [2021-11-20 06:35:14,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852460738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:35:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077087215] [2021-11-20 06:35:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:14,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:35:14,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:35:14,290 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:35:14,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:35:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:35:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:35:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2021-11-20 06:35:15,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:35:15,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077087215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:15,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:35:15,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-11-20 06:35:15,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645574919] [2021-11-20 06:35:15,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:15,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:35:15,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:15,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:35:15,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:35:15,518 INFO L87 Difference]: Start difference. First operand 2949 states and 4457 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:35:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:15,703 INFO L93 Difference]: Finished difference Result 5567 states and 8431 transitions. [2021-11-20 06:35:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:35:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 260 [2021-11-20 06:35:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:15,718 INFO L225 Difference]: With dead ends: 5567 [2021-11-20 06:35:15,718 INFO L226 Difference]: Without dead ends: 3009 [2021-11-20 06:35:15,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:35:15,728 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 19 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:15,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3392 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:35:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-11-20 06:35:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2955. [2021-11-20 06:35:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2330 states have (on average 1.3931330472103005) internal successors, (3246), 2351 states have internal predecessors, (3246), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2021-11-20 06:35:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4463 transitions. [2021-11-20 06:35:15,936 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4463 transitions. Word has length 260 [2021-11-20 06:35:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:15,936 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 4463 transitions. [2021-11-20 06:35:15,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:35:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4463 transitions. [2021-11-20 06:35:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-20 06:35:15,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:15,960 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:15,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:35:16,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:35:16,174 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:16,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1916667489, now seen corresponding path program 1 times [2021-11-20 06:35:16,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:16,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917631142] [2021-11-20 06:35:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:16,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:16,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:35:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:16,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:35:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:16,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:35:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:16,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:16,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:35:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:35:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:35:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:35:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:35:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:35:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-20 06:35:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2021-11-20 06:35:17,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:17,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917631142] [2021-11-20 06:35:17,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917631142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:35:17,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980022948] [2021-11-20 06:35:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:17,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:35:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:35:17,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:35:17,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:35:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:35:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:35:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2021-11-20 06:35:18,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:35:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2021-11-20 06:35:18,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980022948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:35:18,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:35:18,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2021-11-20 06:35:18,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624602725] [2021-11-20 06:35:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:35:18,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:35:18,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:35:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:35:18,974 INFO L87 Difference]: Start difference. First operand 2955 states and 4463 transitions. Second operand has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-20 06:35:22,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:35:24,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:35:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:44,123 INFO L93 Difference]: Finished difference Result 6239 states and 9724 transitions. [2021-11-20 06:35:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:35:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 255 [2021-11-20 06:35:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:44,146 INFO L225 Difference]: With dead ends: 6239 [2021-11-20 06:35:44,146 INFO L226 Difference]: Without dead ends: 3675 [2021-11-20 06:35:44,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:35:44,159 INFO L933 BasicCegarLoop]: 1853 mSDtfsCounter, 3779 mSDsluCounter, 9035 mSDsCounter, 0 mSdLazyCounter, 5346 mSolverCounterSat, 1803 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3859 SdHoareTripleChecker+Valid, 10888 SdHoareTripleChecker+Invalid, 7151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1803 IncrementalHoareTripleChecker+Valid, 5346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:44,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3859 Valid, 10888 Invalid, 7151 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1803 Valid, 5346 Invalid, 2 Unknown, 0 Unchecked, 22.9s Time] [2021-11-20 06:35:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2021-11-20 06:35:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3017. [2021-11-20 06:35:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2384 states have (on average 1.3913590604026846) internal successors, (3317), 2404 states have internal predecessors, (3317), 526 states have call successors, (526), 98 states have call predecessors, (526), 106 states have return successors, (715), 534 states have call predecessors, (715), 524 states have call successors, (715) [2021-11-20 06:35:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4558 transitions. [2021-11-20 06:35:44,328 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4558 transitions. Word has length 255 [2021-11-20 06:35:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:44,329 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4558 transitions. [2021-11-20 06:35:44,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-20 06:35:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4558 transitions. [2021-11-20 06:35:44,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 06:35:44,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:44,348 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:44,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:35:44,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:35:44,574 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1542501268, now seen corresponding path program 1 times [2021-11-20 06:35:44,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:44,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579886432] [2021-11-20 06:35:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:44,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:44,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:35:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:35:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:35:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:35:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:35:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:35:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:35:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:35:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:35:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:35:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:35:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:35:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2021-11-20 06:35:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2021-11-20 06:35:45,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579886432] [2021-11-20 06:35:45,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579886432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:35:45,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88976901] [2021-11-20 06:35:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:45,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:35:45,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:35:45,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:35:45,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:35:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:46,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:35:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:35:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2021-11-20 06:35:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:35:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:35:47,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88976901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:35:47,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:35:47,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2021-11-20 06:35:47,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112138978] [2021-11-20 06:35:47,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:35:47,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:35:47,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:35:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:35:47,779 INFO L87 Difference]: Start difference. First operand 3017 states and 4558 transitions. Second operand has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 06:35:51,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:07,408 INFO L93 Difference]: Finished difference Result 6481 states and 10114 transitions. [2021-11-20 06:36:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:36:07,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 264 [2021-11-20 06:36:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:07,427 INFO L225 Difference]: With dead ends: 6481 [2021-11-20 06:36:07,427 INFO L226 Difference]: Without dead ends: 3855 [2021-11-20 06:36:07,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:36:07,438 INFO L933 BasicCegarLoop]: 1738 mSDtfsCounter, 3932 mSDsluCounter, 7713 mSDsCounter, 0 mSdLazyCounter, 4313 mSolverCounterSat, 1746 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4011 SdHoareTripleChecker+Valid, 9451 SdHoareTripleChecker+Invalid, 6060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1746 IncrementalHoareTripleChecker+Valid, 4313 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:07,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4011 Valid, 9451 Invalid, 6060 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1746 Valid, 4313 Invalid, 1 Unknown, 0 Unchecked, 17.6s Time] [2021-11-20 06:36:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-11-20 06:36:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3197. [2021-11-20 06:36:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 2537 states have (on average 1.3819471817106819) internal successors, (3506), 2557 states have internal predecessors, (3506), 553 states have call successors, (553), 98 states have call predecessors, (553), 106 states have return successors, (769), 561 states have call predecessors, (769), 551 states have call successors, (769) [2021-11-20 06:36:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4828 transitions. [2021-11-20 06:36:07,622 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4828 transitions. Word has length 264 [2021-11-20 06:36:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:07,623 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 4828 transitions. [2021-11-20 06:36:07,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 06:36:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4828 transitions. [2021-11-20 06:36:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-20 06:36:07,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:07,639 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:07,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:07,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:07,866 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1692400654, now seen corresponding path program 1 times [2021-11-20 06:36:07,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:07,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623504621] [2021-11-20 06:36:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:07,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:36:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:36:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:36:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:36:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:36:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:36:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:36:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:36:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:36:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:36:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:36:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:36:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:36:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-11-20 06:36:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2055 trivial. 0 not checked. [2021-11-20 06:36:08,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:08,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623504621] [2021-11-20 06:36:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623504621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:36:08,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871361691] [2021-11-20 06:36:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:08,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:08,292 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:08,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:36:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:36:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2021-11-20 06:36:09,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:36:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2021-11-20 06:36:10,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871361691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:10,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:36:10,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-20 06:36:10,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138265805] [2021-11-20 06:36:10,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:10,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:36:10,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:36:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:36:10,733 INFO L87 Difference]: Start difference. First operand 3197 states and 4828 transitions. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 06:36:13,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:15,972 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:29,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:33,672 INFO L93 Difference]: Finished difference Result 6806 states and 10614 transitions. [2021-11-20 06:36:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:36:33,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 267 [2021-11-20 06:36:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:33,694 INFO L225 Difference]: With dead ends: 6806 [2021-11-20 06:36:33,695 INFO L226 Difference]: Without dead ends: 4000 [2021-11-20 06:36:33,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:36:33,706 INFO L933 BasicCegarLoop]: 1822 mSDtfsCounter, 1501 mSDsluCounter, 6180 mSDsCounter, 0 mSdLazyCounter, 4414 mSolverCounterSat, 615 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 8002 SdHoareTripleChecker+Invalid, 5032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 4414 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:33,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1629 Valid, 8002 Invalid, 5032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [615 Valid, 4414 Invalid, 3 Unknown, 0 Unchecked, 22.0s Time] [2021-11-20 06:36:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2021-11-20 06:36:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 3333. [2021-11-20 06:36:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 2653 states have (on average 1.3795702977761026) internal successors, (3660), 2674 states have internal predecessors, (3660), 573 states have call successors, (573), 98 states have call predecessors, (573), 106 states have return successors, (809), 580 states have call predecessors, (809), 571 states have call successors, (809) [2021-11-20 06:36:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5042 transitions. [2021-11-20 06:36:33,903 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5042 transitions. Word has length 267 [2021-11-20 06:36:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:33,904 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 5042 transitions. [2021-11-20 06:36:33,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-20 06:36:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5042 transitions. [2021-11-20 06:36:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-11-20 06:36:33,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:33,923 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:36:33,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:34,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:36:34,150 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash -155863204, now seen corresponding path program 1 times [2021-11-20 06:36:34,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:34,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777741427] [2021-11-20 06:36:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:34,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:34,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096806152] [2021-11-20 06:36:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:34,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:34,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:34,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:36:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:35,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 4120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:36:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2021-11-20 06:36:36,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:36:36,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777741427] [2021-11-20 06:36:36,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096806152] [2021-11-20 06:36:36,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096806152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:36,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:36,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:36:36,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368412757] [2021-11-20 06:36:36,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:36,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:36:36,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:36:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:36:36,648 INFO L87 Difference]: Start difference. First operand 3333 states and 5042 transitions. Second operand has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-20 06:36:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:37,072 INFO L93 Difference]: Finished difference Result 5553 states and 8502 transitions. [2021-11-20 06:36:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:36:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) Word has length 534 [2021-11-20 06:36:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:37,092 INFO L225 Difference]: With dead ends: 5553 [2021-11-20 06:36:37,092 INFO L226 Difference]: Without dead ends: 3349 [2021-11-20 06:36:37,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:36:37,105 INFO L933 BasicCegarLoop]: 1707 mSDtfsCounter, 6 mSDsluCounter, 11926 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13633 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:37,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 13633 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2021-11-20 06:36:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 3338. [2021-11-20 06:36:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2657 states have (on average 1.378998870907038) internal successors, (3664), 2678 states have internal predecessors, (3664), 573 states have call successors, (573), 98 states have call predecessors, (573), 107 states have return successors, (824), 581 states have call predecessors, (824), 571 states have call successors, (824) [2021-11-20 06:36:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5061 transitions. [2021-11-20 06:36:37,281 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5061 transitions. Word has length 534 [2021-11-20 06:36:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:37,284 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 5061 transitions. [2021-11-20 06:36:37,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-20 06:36:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5061 transitions. [2021-11-20 06:36:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-20 06:36:37,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:37,302 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:37,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:37,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:37,530 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:37,530 INFO L85 PathProgramCache]: Analyzing trace with hash -341351803, now seen corresponding path program 1 times [2021-11-20 06:36:37,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:37,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872181469] [2021-11-20 06:36:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:37,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:37,565 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:37,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422289270] [2021-11-20 06:36:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:37,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:37,567 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:37,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:36:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:38,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:36:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2021-11-20 06:36:39,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:36:39,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:39,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872181469] [2021-11-20 06:36:39,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:39,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422289270] [2021-11-20 06:36:39,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422289270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:39,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:39,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:36:39,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503428323] [2021-11-20 06:36:39,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:39,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:36:39,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:36:39,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:36:39,083 INFO L87 Difference]: Start difference. First operand 3338 states and 5061 transitions. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 06:36:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:39,529 INFO L93 Difference]: Finished difference Result 5578 states and 8593 transitions. [2021-11-20 06:36:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:36:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 309 [2021-11-20 06:36:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:39,544 INFO L225 Difference]: With dead ends: 5578 [2021-11-20 06:36:39,544 INFO L226 Difference]: Without dead ends: 3369 [2021-11-20 06:36:39,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:36:39,557 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 7 mSDsluCounter, 12036 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13760 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:39,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13760 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-11-20 06:36:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3355. [2021-11-20 06:36:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 2668 states have (on average 1.3774362818590704) internal successors, (3675), 2688 states have internal predecessors, (3675), 577 states have call successors, (577), 98 states have call predecessors, (577), 109 states have return successors, (858), 588 states have call predecessors, (858), 575 states have call successors, (858) [2021-11-20 06:36:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 5110 transitions. [2021-11-20 06:36:39,733 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 5110 transitions. Word has length 309 [2021-11-20 06:36:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:39,734 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 5110 transitions. [2021-11-20 06:36:39,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 06:36:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 5110 transitions. [2021-11-20 06:36:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-20 06:36:39,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:39,753 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 18, 18, 17, 17, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:39,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:39,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:39,978 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash -985129133, now seen corresponding path program 1 times [2021-11-20 06:36:39,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:39,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572627760] [2021-11-20 06:36:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:39,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:40,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:40,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790198494] [2021-11-20 06:36:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:40,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:40,059 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:40,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:36:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 3852 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:36:40,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 134 proven. 86 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2021-11-20 06:36:42,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:36:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 42 proven. 10 refuted. 0 times theorem prover too weak. 2050 trivial. 0 not checked. [2021-11-20 06:36:46,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:46,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572627760] [2021-11-20 06:36:46,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:46,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790198494] [2021-11-20 06:36:46,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790198494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:46,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:36:46,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2021-11-20 06:36:46,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249781322] [2021-11-20 06:36:46,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:46,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:36:46,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:36:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:36:46,060 INFO L87 Difference]: Start difference. First operand 3355 states and 5110 transitions. Second operand has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 8 states have call successors, (60), 8 states have call predecessors, (60), 10 states have return successors, (59), 7 states have call predecessors, (59), 7 states have call successors, (59) [2021-11-20 06:36:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:54,169 INFO L93 Difference]: Finished difference Result 3554 states and 5393 transitions. [2021-11-20 06:36:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:36:54,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 8 states have call successors, (60), 8 states have call predecessors, (60), 10 states have return successors, (59), 7 states have call predecessors, (59), 7 states have call successors, (59) Word has length 504 [2021-11-20 06:36:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:54,191 INFO L225 Difference]: With dead ends: 3554 [2021-11-20 06:36:54,191 INFO L226 Difference]: Without dead ends: 3551 [2021-11-20 06:36:54,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:36:54,196 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 6736 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 2859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6743 SdHoareTripleChecker+Valid, 3304 SdHoareTripleChecker+Invalid, 4724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2859 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:54,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6743 Valid, 3304 Invalid, 4724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2859 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-20 06:36:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-11-20 06:36:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 3483. [2021-11-20 06:36:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2772 states have (on average 1.3834776334776335) internal successors, (3835), 2791 states have internal predecessors, (3835), 586 states have call successors, (586), 111 states have call predecessors, (586), 124 states have return successors, (865), 601 states have call predecessors, (865), 585 states have call successors, (865) [2021-11-20 06:36:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5286 transitions. [2021-11-20 06:36:54,442 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5286 transitions. Word has length 504 [2021-11-20 06:36:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:54,444 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 5286 transitions. [2021-11-20 06:36:54,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 8 states have call successors, (60), 8 states have call predecessors, (60), 10 states have return successors, (59), 7 states have call predecessors, (59), 7 states have call successors, (59) [2021-11-20 06:36:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5286 transitions. [2021-11-20 06:36:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-20 06:36:54,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:54,461 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:54,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:54,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:54,690 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1370146510, now seen corresponding path program 1 times [2021-11-20 06:36:54,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:54,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409148878] [2021-11-20 06:36:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:54,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:36:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:36:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:36:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:36:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:36:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:36:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:36:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:36:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:54,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:36:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:55,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:36:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:55,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:36:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:55,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:36:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:55,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:36:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:55,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-20 06:36:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2021-11-20 06:36:55,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409148878] [2021-11-20 06:36:55,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409148878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:55,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:55,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:36:55,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491291764] [2021-11-20 06:36:55,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:55,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:36:55,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:36:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:36:55,070 INFO L87 Difference]: Start difference. First operand 3483 states and 5286 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:36:57,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:59,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:37:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:07,699 INFO L93 Difference]: Finished difference Result 7362 states and 11512 transitions. [2021-11-20 06:37:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:37:07,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 259 [2021-11-20 06:37:07,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:07,715 INFO L225 Difference]: With dead ends: 7362 [2021-11-20 06:37:07,715 INFO L226 Difference]: Without dead ends: 4270 [2021-11-20 06:37:07,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:37:07,723 INFO L933 BasicCegarLoop]: 1807 mSDtfsCounter, 2099 mSDsluCounter, 2818 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 1278 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 4625 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1278 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:07,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2211 Valid, 4625 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1278 Valid, 1961 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2021-11-20 06:37:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2021-11-20 06:37:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3483. [2021-11-20 06:37:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2772 states have (on average 1.3813131313131313) internal successors, (3829), 2791 states have internal predecessors, (3829), 586 states have call successors, (586), 111 states have call predecessors, (586), 124 states have return successors, (865), 601 states have call predecessors, (865), 585 states have call successors, (865) [2021-11-20 06:37:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5280 transitions. [2021-11-20 06:37:07,936 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5280 transitions. Word has length 259 [2021-11-20 06:37:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:07,937 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 5280 transitions. [2021-11-20 06:37:07,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:37:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5280 transitions. [2021-11-20 06:37:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-20 06:37:07,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:07,954 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:07,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:37:07,955 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:07,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1015980618, now seen corresponding path program 1 times [2021-11-20 06:37:07,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:07,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405348487] [2021-11-20 06:37:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:07,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:37:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:37:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:37:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:37:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:37:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:37:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:37:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:37:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:37:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:37:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:37:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-20 06:37:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2021-11-20 06:37:08,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405348487] [2021-11-20 06:37:08,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405348487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051156169] [2021-11-20 06:37:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:08,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:08,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:08,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:37:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:37:09,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:10,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:37:10,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051156169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:10,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:37:10,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-20 06:37:10,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743607029] [2021-11-20 06:37:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:10,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:37:10,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:37:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:37:10,243 INFO L87 Difference]: Start difference. First operand 3483 states and 5280 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:37:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:10,542 INFO L93 Difference]: Finished difference Result 6773 states and 10316 transitions. [2021-11-20 06:37:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:37:10,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 258 [2021-11-20 06:37:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:10,556 INFO L225 Difference]: With dead ends: 6773 [2021-11-20 06:37:10,556 INFO L226 Difference]: Without dead ends: 3681 [2021-11-20 06:37:10,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:37:10,563 INFO L933 BasicCegarLoop]: 1743 mSDtfsCounter, 135 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 5152 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:10,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 5152 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:37:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-11-20 06:37:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3533. [2021-11-20 06:37:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 2811 states have (on average 1.3820704375667023) internal successors, (3885), 2826 states have internal predecessors, (3885), 597 states have call successors, (597), 111 states have call predecessors, (597), 124 states have return successors, (887), 616 states have call predecessors, (887), 596 states have call successors, (887) [2021-11-20 06:37:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 5369 transitions. [2021-11-20 06:37:10,759 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 5369 transitions. Word has length 258 [2021-11-20 06:37:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:10,760 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 5369 transitions. [2021-11-20 06:37:10,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:37:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 5369 transitions. [2021-11-20 06:37:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-20 06:37:10,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:10,779 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:10,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:11,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:11,006 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash -574412184, now seen corresponding path program 1 times [2021-11-20 06:37:11,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:11,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371426990] [2021-11-20 06:37:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:11,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:37:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:37:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:37:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:37:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:37:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:37:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:37:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:37:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:37:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:37:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:37:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-20 06:37:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2021-11-20 06:37:11,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371426990] [2021-11-20 06:37:11,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371426990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836394665] [2021-11-20 06:37:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:11,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:11,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:11,934 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:11,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:37:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:37:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:12,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:37:12,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836394665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:12,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:37:12,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 12 [2021-11-20 06:37:12,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251542260] [2021-11-20 06:37:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:12,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:37:12,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:37:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:37:12,994 INFO L87 Difference]: Start difference. First operand 3533 states and 5369 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:37:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:13,291 INFO L93 Difference]: Finished difference Result 6709 states and 10210 transitions. [2021-11-20 06:37:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:37:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 259 [2021-11-20 06:37:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:13,352 INFO L225 Difference]: With dead ends: 6709 [2021-11-20 06:37:13,352 INFO L226 Difference]: Without dead ends: 3567 [2021-11-20 06:37:13,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:37:13,359 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 127 mSDsluCounter, 4978 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:13,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 6692 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:37:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-11-20 06:37:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3533. [2021-11-20 06:37:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 2811 states have (on average 1.3810032017075773) internal successors, (3882), 2826 states have internal predecessors, (3882), 597 states have call successors, (597), 111 states have call predecessors, (597), 124 states have return successors, (887), 616 states have call predecessors, (887), 596 states have call successors, (887) [2021-11-20 06:37:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 5366 transitions. [2021-11-20 06:37:13,551 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 5366 transitions. Word has length 259 [2021-11-20 06:37:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:13,552 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 5366 transitions. [2021-11-20 06:37:13,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:37:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 5366 transitions. [2021-11-20 06:37:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-20 06:37:13,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:13,570 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:13,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:13,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:37:13,798 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 211525367, now seen corresponding path program 1 times [2021-11-20 06:37:13,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950129575] [2021-11-20 06:37:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:13,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:37:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:37:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:37:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:37:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:37:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:37:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:37:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:37:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:37:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:37:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:37:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-11-20 06:37:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:14,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:14,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950129575] [2021-11-20 06:37:14,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950129575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788152717] [2021-11-20 06:37:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:14,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:14,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:14,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:37:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:37:14,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:15,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:15,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788152717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:15,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:15,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2021-11-20 06:37:15,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248095635] [2021-11-20 06:37:15,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:15,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:37:15,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:15,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:37:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:37:15,859 INFO L87 Difference]: Start difference. First operand 3533 states and 5366 transitions. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 9 states have internal predecessors, (124), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:37:19,098 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:37:21,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:37:33,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:37:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:37,554 INFO L93 Difference]: Finished difference Result 4385 states and 6991 transitions. [2021-11-20 06:37:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:37:37,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 9 states have internal predecessors, (124), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 261 [2021-11-20 06:37:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:37,577 INFO L225 Difference]: With dead ends: 4385 [2021-11-20 06:37:37,577 INFO L226 Difference]: Without dead ends: 4379 [2021-11-20 06:37:37,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:37:37,582 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 1339 mSDsluCounter, 6200 mSDsCounter, 0 mSdLazyCounter, 4242 mSolverCounterSat, 527 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 8032 SdHoareTripleChecker+Invalid, 4772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 4242 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:37,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 8032 Invalid, 4772 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [527 Valid, 4242 Invalid, 3 Unknown, 0 Unchecked, 21.3s Time] [2021-11-20 06:37:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-11-20 06:37:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3581. [2021-11-20 06:37:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 2851 states have (on average 1.3784636969484392) internal successors, (3930), 2866 states have internal predecessors, (3930), 605 states have call successors, (605), 111 states have call predecessors, (605), 124 states have return successors, (903), 624 states have call predecessors, (903), 604 states have call successors, (903) [2021-11-20 06:37:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5438 transitions. [2021-11-20 06:37:37,915 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5438 transitions. Word has length 261 [2021-11-20 06:37:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:37,915 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5438 transitions. [2021-11-20 06:37:37,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 9 states have internal predecessors, (124), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:37:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5438 transitions. [2021-11-20 06:37:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-20 06:37:37,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:37,936 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:37,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:38,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:37:38,162 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash -162578242, now seen corresponding path program 1 times [2021-11-20 06:37:38,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:38,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862653029] [2021-11-20 06:37:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:38,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:37:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:37:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:37:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:37:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:37:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:37:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:37:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:37:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:37:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:37:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:37:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:37:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-20 06:37:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:38,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:38,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862653029] [2021-11-20 06:37:38,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862653029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:38,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712732382] [2021-11-20 06:37:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:38,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:38,834 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:38,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:37:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:37:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:37:40,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712732382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:40,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:40,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2021-11-20 06:37:40,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286260164] [2021-11-20 06:37:40,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:40,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:37:40,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:37:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:37:40,908 INFO L87 Difference]: Start difference. First operand 3581 states and 5438 transitions. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 17 states have internal predecessors, (154), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:37:44,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:37:46,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:38:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:00,445 INFO L93 Difference]: Finished difference Result 4481 states and 7139 transitions. [2021-11-20 06:38:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:38:00,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 17 states have internal predecessors, (154), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 275 [2021-11-20 06:38:00,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:00,464 INFO L225 Difference]: With dead ends: 4481 [2021-11-20 06:38:00,464 INFO L226 Difference]: Without dead ends: 4475 [2021-11-20 06:38:00,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:38:00,468 INFO L933 BasicCegarLoop]: 1705 mSDtfsCounter, 2308 mSDsluCounter, 8520 mSDsCounter, 0 mSdLazyCounter, 4207 mSolverCounterSat, 1331 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2446 SdHoareTripleChecker+Valid, 10225 SdHoareTripleChecker+Invalid, 5540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1331 IncrementalHoareTripleChecker+Valid, 4207 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:00,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2446 Valid, 10225 Invalid, 5540 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1331 Valid, 4207 Invalid, 2 Unknown, 0 Unchecked, 19.1s Time] [2021-11-20 06:38:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-11-20 06:38:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3677. [2021-11-20 06:38:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 2931 states have (on average 1.3735926305015353) internal successors, (4026), 2946 states have internal predecessors, (4026), 621 states have call successors, (621), 111 states have call predecessors, (621), 124 states have return successors, (935), 640 states have call predecessors, (935), 620 states have call successors, (935) [2021-11-20 06:38:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 5582 transitions. [2021-11-20 06:38:00,648 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 5582 transitions. Word has length 275 [2021-11-20 06:38:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:00,649 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 5582 transitions. [2021-11-20 06:38:00,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 17 states have internal predecessors, (154), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:38:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 5582 transitions. [2021-11-20 06:38:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-20 06:38:00,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:00,676 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 14, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:00,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:00,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:00,890 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 251197785, now seen corresponding path program 1 times [2021-11-20 06:38:00,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:00,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573214355] [2021-11-20 06:38:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:00,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:38:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:38:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:38:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:38:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:38:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:38:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:38:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:38:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:38:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:38:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-11-20 06:38:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:38:02,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:02,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573214355] [2021-11-20 06:38:02,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573214355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:02,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36200108] [2021-11-20 06:38:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:02,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:02,306 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:02,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:38:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:02,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 2134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:38:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:38:03,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:38:05,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36200108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:05,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:05,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 36 [2021-11-20 06:38:05,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620238108] [2021-11-20 06:38:05,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:05,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:38:05,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:38:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:38:05,885 INFO L87 Difference]: Start difference. First operand 3677 states and 5582 transitions. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 33 states have internal predecessors, (216), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:38:09,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:38:11,452 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:38:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:22,822 INFO L93 Difference]: Finished difference Result 4673 states and 7435 transitions. [2021-11-20 06:38:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:38:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 33 states have internal predecessors, (216), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 305 [2021-11-20 06:38:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:22,850 INFO L225 Difference]: With dead ends: 4673 [2021-11-20 06:38:22,851 INFO L226 Difference]: Without dead ends: 4667 [2021-11-20 06:38:22,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:38:22,856 INFO L933 BasicCegarLoop]: 1717 mSDtfsCounter, 2507 mSDsluCounter, 5694 mSDsCounter, 0 mSdLazyCounter, 3254 mSolverCounterSat, 1487 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2679 SdHoareTripleChecker+Valid, 7411 SdHoareTripleChecker+Invalid, 4743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 3254 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:22,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2679 Valid, 7411 Invalid, 4743 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1487 Valid, 3254 Invalid, 2 Unknown, 0 Unchecked, 16.4s Time] [2021-11-20 06:38:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-11-20 06:38:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3869. [2021-11-20 06:38:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3091 states have (on average 1.3646069233257845) internal successors, (4218), 3106 states have internal predecessors, (4218), 653 states have call successors, (653), 111 states have call predecessors, (653), 124 states have return successors, (999), 672 states have call predecessors, (999), 652 states have call successors, (999) [2021-11-20 06:38:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 5870 transitions. [2021-11-20 06:38:23,037 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 5870 transitions. Word has length 305 [2021-11-20 06:38:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:23,038 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 5870 transitions. [2021-11-20 06:38:23,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 33 states have internal predecessors, (216), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:38:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 5870 transitions. [2021-11-20 06:38:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-20 06:38:23,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:23,077 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 30, 30, 30, 30, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:23,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-20 06:38:23,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:23,306 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:23,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:23,306 INFO L85 PathProgramCache]: Analyzing trace with hash -577522956, now seen corresponding path program 1 times [2021-11-20 06:38:23,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:23,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849267404] [2021-11-20 06:38:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:23,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:38:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:38:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:38:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:38:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:38:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:38:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:38:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:38:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:38:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:38:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-11-20 06:38:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:38:26,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:26,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849267404] [2021-11-20 06:38:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849267404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:26,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457031153] [2021-11-20 06:38:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:26,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:26,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:26,370 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:26,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:38:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2293 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 06:38:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:38:28,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-20 06:38:29,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457031153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:29,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:29,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 38 [2021-11-20 06:38:29,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290540500] [2021-11-20 06:38:29,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:29,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 06:38:29,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 06:38:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:38:29,682 INFO L87 Difference]: Start difference. First operand 3869 states and 5870 transitions. Second operand has 38 states, 38 states have (on average 6.2368421052631575) internal successors, (237), 35 states have internal predecessors, (237), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:38:33,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:38:35,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:38:55,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:00,266 INFO L93 Difference]: Finished difference Result 4697 states and 7457 transitions. [2021-11-20 06:39:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 06:39:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.2368421052631575) internal successors, (237), 35 states have internal predecessors, (237), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 378 [2021-11-20 06:39:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:00,288 INFO L225 Difference]: With dead ends: 4697 [2021-11-20 06:39:00,288 INFO L226 Difference]: Without dead ends: 4691 [2021-11-20 06:39:00,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:39:00,292 INFO L933 BasicCegarLoop]: 1871 mSDtfsCounter, 1519 mSDsluCounter, 10573 mSDsCounter, 0 mSdLazyCounter, 6616 mSolverCounterSat, 654 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 12444 SdHoareTripleChecker+Invalid, 7273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 6616 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:00,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1695 Valid, 12444 Invalid, 7273 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [654 Valid, 6616 Invalid, 3 Unknown, 0 Unchecked, 29.9s Time] [2021-11-20 06:39:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-20 06:39:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3893. [2021-11-20 06:39:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3111 states have (on average 1.3635486981677918) internal successors, (4242), 3126 states have internal predecessors, (4242), 657 states have call successors, (657), 111 states have call predecessors, (657), 124 states have return successors, (1007), 676 states have call predecessors, (1007), 656 states have call successors, (1007) [2021-11-20 06:39:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5906 transitions. [2021-11-20 06:39:00,541 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5906 transitions. Word has length 378 [2021-11-20 06:39:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:00,542 INFO L470 AbstractCegarLoop]: Abstraction has 3893 states and 5906 transitions. [2021-11-20 06:39:00,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.2368421052631575) internal successors, (237), 35 states have internal predecessors, (237), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:39:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5906 transitions. [2021-11-20 06:39:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-20 06:39:00,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:00,583 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:00,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:00,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f842dce7-851c-4558-8c09-2563c58132fb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:00,810 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:00,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1923778654, now seen corresponding path program 2 times [2021-11-20 06:39:00,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:00,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653481802] [2021-11-20 06:39:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:00,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:39:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:39:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:39:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:39:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:39:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:39:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:39:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:39:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:39:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:39:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:39:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:01,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 06:39:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:02,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:39:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:02,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-11-20 06:39:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4043 trivial. 0 not checked. [2021-11-20 06:39:02,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:02,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653481802] [2021-11-20 06:39:02,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653481802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:02,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:02,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:39:02,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685009904] [2021-11-20 06:39:02,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:02,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:39:02,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:39:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:39:02,165 INFO L87 Difference]: Start difference. First operand 3893 states and 5906 transitions. Second operand has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 10 states have internal predecessors, (104), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 06:39:05,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:29,422 INFO L93 Difference]: Finished difference Result 5185 states and 8198 transitions. [2021-11-20 06:39:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:39:29,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 10 states have internal predecessors, (104), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 386 [2021-11-20 06:39:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:29,424 INFO L225 Difference]: With dead ends: 5185 [2021-11-20 06:39:29,424 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 06:39:29,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:39:29,442 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6187 mSDsluCounter, 4325 mSDsCounter, 0 mSdLazyCounter, 6252 mSolverCounterSat, 2950 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6277 SdHoareTripleChecker+Valid, 5856 SdHoareTripleChecker+Invalid, 9203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2950 IncrementalHoareTripleChecker+Valid, 6252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:29,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6277 Valid, 5856 Invalid, 9203 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2950 Valid, 6252 Invalid, 1 Unknown, 0 Unchecked, 25.7s Time] [2021-11-20 06:39:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 06:39:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 06:39:29,444 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) [2021-11-20 06:39:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 06:39:29,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 386 [2021-11-20 06:39:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:29,445 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 06:39:29,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.666666666666666) internal successors, (104), 10 states have internal predecessors, (104), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 06:39:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 06:39:29,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 06:39:29,448 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:39:29,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:39:29,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 06:41:05,943 WARN L227 SmtUtils]: Spent 25.30s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 06:41:42,835 WARN L227 SmtUtils]: Spent 25.20s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 06:42:08,000 WARN L227 SmtUtils]: Spent 25.10s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 06:42:43,759 WARN L227 SmtUtils]: Spent 24.32s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 06:42:53,744 WARN L227 SmtUtils]: Spent 9.47s on a formula simplification. DAG size of input: 82 DAG size of output: 82 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 06:43:03,053 WARN L227 SmtUtils]: Spent 9.31s on a formula simplification. DAG size of input: 82 DAG size of output: 82 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 06:43:53,846 WARN L227 SmtUtils]: Spent 25.64s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)