./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:38:53,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:38:53,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:38:53,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:38:53,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:38:53,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:38:53,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:38:53,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:38:53,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:38:53,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:38:53,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:38:53,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:38:53,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:38:53,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:38:53,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:38:53,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:38:53,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:38:53,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:38:53,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:38:53,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:38:53,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:38:53,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:38:53,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:38:53,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:38:53,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:38:53,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:38:53,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:38:53,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:38:53,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:38:53,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:38:53,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:38:53,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:38:53,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:38:53,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:38:53,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:38:53,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:38:53,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:38:53,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:38:53,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:38:53,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:38:53,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:38:53,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:38:53,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:38:53,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:38:53,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:38:53,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:38:53,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:38:53,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:38:53,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:38:53,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:38:53,651 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:38:53,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:38:53,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:38:53,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:38:53,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:38:53,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:38:53,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:38:53,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:38:53,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:38:53,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:38:53,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:38:53,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:38:53,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:38:53,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:38:53,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:38:53,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:38:53,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:38:53,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:38:53,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:38:53,658 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:38:53,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:38:53,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:38:53,659 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_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2022-11-02 20:38:54,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:38:54,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:38:54,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:38:54,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:38:54,072 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:38:54,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2022-11-02 20:38:54,177 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/data/7d2a9bc00/9b6245f772344734ae792e337c3fde86/FLAG2d2f11cb9 [2022-11-02 20:38:55,168 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:38:55,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2022-11-02 20:38:55,201 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/data/7d2a9bc00/9b6245f772344734ae792e337c3fde86/FLAG2d2f11cb9 [2022-11-02 20:38:55,666 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/data/7d2a9bc00/9b6245f772344734ae792e337c3fde86 [2022-11-02 20:38:55,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:38:55,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:38:55,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:38:55,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:38:55,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:38:55,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:38:55" (1/1) ... [2022-11-02 20:38:55,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64979ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:55, skipping insertion in model container [2022-11-02 20:38:55,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:38:55" (1/1) ... [2022-11-02 20:38:55,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:38:55,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:38:56,677 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_19a51792-a88f-4d20-bb05-b1b3b5c6e475/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2022-11-02 20:38:56,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:38:56,879 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:38:57,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2022-11-02 20:38:57,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:38:57,136 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:38:57,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57 WrapperNode [2022-11-02 20:38:57,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:38:57,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:38:57,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:38:57,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:38:57,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,271 INFO L138 Inliner]: procedures = 82, calls = 140, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 461 [2022-11-02 20:38:57,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:38:57,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:38:57,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:38:57,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:38:57,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,381 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:38:57,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:38:57,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:38:57,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:38:57,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (1/1) ... [2022-11-02 20:38:57,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:38:57,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:38:57,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:38:57,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:38:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:38:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-02 20:38:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:38:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:38:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-02 20:38:57,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-02 20:38:57,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-02 20:38:57,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-02 20:38:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:38:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:38:57,555 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-02 20:38:57,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-02 20:38:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-02 20:38:57,556 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-02 20:38:57,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 20:38:57,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 20:38:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:38:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:38:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-02 20:38:57,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-02 20:38:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:38:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-02 20:38:57,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-02 20:38:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-02 20:38:57,558 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-02 20:38:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:38:57,559 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:38:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:38:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:38:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2022-11-02 20:38:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2022-11-02 20:38:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-02 20:38:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-02 20:38:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-02 20:38:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:38:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:38:57,938 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:38:57,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:38:58,087 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-02 20:38:58,672 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:38:58,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:38:58,682 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:38:58,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:38:58 BoogieIcfgContainer [2022-11-02 20:38:58,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:38:58,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:38:58,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:38:58,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:38:58,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:38:55" (1/3) ... [2022-11-02 20:38:58,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151d09c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:38:58, skipping insertion in model container [2022-11-02 20:38:58,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:57" (2/3) ... [2022-11-02 20:38:58,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151d09c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:38:58, skipping insertion in model container [2022-11-02 20:38:58,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:38:58" (3/3) ... [2022-11-02 20:38:58,697 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2022-11-02 20:38:58,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:38:58,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:38:58,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:38:58,851 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c408b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:38:58,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:38:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 136 states have internal predecessors, (186), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-02 20:38:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:38:58,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:58,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:58,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:38:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1048731652, now seen corresponding path program 1 times [2022-11-02 20:38:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:58,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456106424] [2022-11-02 20:38:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:59,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:38:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:38:59,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:38:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456106424] [2022-11-02 20:38:59,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456106424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:38:59,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:38:59,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:38:59,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280731833] [2022-11-02 20:38:59,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:38:59,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:38:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:38:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:38:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:38:59,564 INFO L87 Difference]: Start difference. First operand has 164 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 136 states have internal predecessors, (186), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-11-02 20:39:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:00,258 INFO L93 Difference]: Finished difference Result 500 states and 731 transitions. [2022-11-02 20:39:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:00,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-11-02 20:39:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:00,291 INFO L225 Difference]: With dead ends: 500 [2022-11-02 20:39:00,291 INFO L226 Difference]: Without dead ends: 327 [2022-11-02 20:39:00,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:00,314 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 275 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:00,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 496 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:39:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-02 20:39:00,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 279. [2022-11-02 20:39:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 228 states have (on average 1.3421052631578947) internal successors, (306), 228 states have internal predecessors, (306), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-02 20:39:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 373 transitions. [2022-11-02 20:39:00,472 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 373 transitions. Word has length 25 [2022-11-02 20:39:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:00,473 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 373 transitions. [2022-11-02 20:39:00,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-11-02 20:39:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 373 transitions. [2022-11-02 20:39:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:39:00,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:00,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:00,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:39:00,478 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1324273599, now seen corresponding path program 1 times [2022-11-02 20:39:00,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:00,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381101852] [2022-11-02 20:39:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:00,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:00,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381101852] [2022-11-02 20:39:00,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381101852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:00,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:00,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:39:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828604041] [2022-11-02 20:39:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:39:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:39:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:00,751 INFO L87 Difference]: Start difference. First operand 279 states and 373 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-02 20:39:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:01,183 INFO L93 Difference]: Finished difference Result 602 states and 813 transitions. [2022-11-02 20:39:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:39:01,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 [2022-11-02 20:39:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:01,188 INFO L225 Difference]: With dead ends: 602 [2022-11-02 20:39:01,188 INFO L226 Difference]: Without dead ends: 331 [2022-11-02 20:39:01,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:39:01,191 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 49 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:01,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 458 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:39:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-02 20:39:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 280. [2022-11-02 20:39:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 229 states have (on average 1.3406113537117903) internal successors, (307), 229 states have internal predecessors, (307), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-02 20:39:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 374 transitions. [2022-11-02 20:39:01,270 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 374 transitions. Word has length 30 [2022-11-02 20:39:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:01,272 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 374 transitions. [2022-11-02 20:39:01,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-02 20:39:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 374 transitions. [2022-11-02 20:39:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:39:01,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:01,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:39:01,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -115857752, now seen corresponding path program 1 times [2022-11-02 20:39:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:01,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826026053] [2022-11-02 20:39:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:01,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:01,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:01,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:01,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826026053] [2022-11-02 20:39:01,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826026053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:01,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371459342] [2022-11-02 20:39:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:01,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:01,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:01,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:01,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:39:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:01,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:39:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:01,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:01,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371459342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:01,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:01,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-02 20:39:01,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197259412] [2022-11-02 20:39:01,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:01,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:39:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:39:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:01,905 INFO L87 Difference]: Start difference. First operand 280 states and 374 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:39:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:02,415 INFO L93 Difference]: Finished difference Result 612 states and 827 transitions. [2022-11-02 20:39:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-02 20:39:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:02,425 INFO L225 Difference]: With dead ends: 612 [2022-11-02 20:39:02,425 INFO L226 Difference]: Without dead ends: 340 [2022-11-02 20:39:02,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:02,435 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 63 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:02,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 762 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:39:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-02 20:39:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 292. [2022-11-02 20:39:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 241 states have (on average 1.3360995850622406) internal successors, (322), 241 states have internal predecessors, (322), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-02 20:39:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 389 transitions. [2022-11-02 20:39:02,501 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 389 transitions. Word has length 34 [2022-11-02 20:39:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:02,502 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 389 transitions. [2022-11-02 20:39:02,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:39:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 389 transitions. [2022-11-02 20:39:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:39:02,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:02,512 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:02,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:02,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:02,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash -124336931, now seen corresponding path program 2 times [2022-11-02 20:39:02,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:02,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334674887] [2022-11-02 20:39:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:02,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:39:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:02,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334674887] [2022-11-02 20:39:02,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334674887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:02,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:02,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217323577] [2022-11-02 20:39:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:02,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:02,969 INFO L87 Difference]: Start difference. First operand 292 states and 389 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2022-11-02 20:39:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:03,499 INFO L93 Difference]: Finished difference Result 623 states and 837 transitions. [2022-11-02 20:39:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:03,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 46 [2022-11-02 20:39:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:03,503 INFO L225 Difference]: With dead ends: 623 [2022-11-02 20:39:03,503 INFO L226 Difference]: Without dead ends: 339 [2022-11-02 20:39:03,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:39:03,505 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 356 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:03,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 614 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:39:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-02 20:39:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2022-11-02 20:39:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 240 states have (on average 1.325) internal successors, (318), 240 states have internal predecessors, (318), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-02 20:39:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 385 transitions. [2022-11-02 20:39:03,545 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 385 transitions. Word has length 46 [2022-11-02 20:39:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:03,546 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 385 transitions. [2022-11-02 20:39:03,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2022-11-02 20:39:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 385 transitions. [2022-11-02 20:39:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:39:03,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:03,554 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:03,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:39:03,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1440028180, now seen corresponding path program 1 times [2022-11-02 20:39:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117911985] [2022-11-02 20:39:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:03,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:03,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:03,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:39:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:03,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:39:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:39:03,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:03,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117911985] [2022-11-02 20:39:03,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117911985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:03,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:03,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:39:03,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786564140] [2022-11-02 20:39:03,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:03,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:39:03,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:39:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:39:04,000 INFO L87 Difference]: Start difference. First operand 291 states and 385 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:39:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:04,672 INFO L93 Difference]: Finished difference Result 946 states and 1278 transitions. [2022-11-02 20:39:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-11-02 20:39:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:04,683 INFO L225 Difference]: With dead ends: 946 [2022-11-02 20:39:04,684 INFO L226 Difference]: Without dead ends: 658 [2022-11-02 20:39:04,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:39:04,687 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 262 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:04,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 813 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:39:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-02 20:39:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 582. [2022-11-02 20:39:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 479 states have (on average 1.3298538622129437) internal successors, (637), 481 states have internal predecessors, (637), 66 states have call successors, (66), 33 states have call predecessors, (66), 36 states have return successors, (75), 67 states have call predecessors, (75), 65 states have call successors, (75) [2022-11-02 20:39:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 778 transitions. [2022-11-02 20:39:04,746 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 778 transitions. Word has length 67 [2022-11-02 20:39:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:04,747 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 778 transitions. [2022-11-02 20:39:04,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:39:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 778 transitions. [2022-11-02 20:39:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-02 20:39:04,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:04,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2022-11-02 20:39:04,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:39:04,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash 338916268, now seen corresponding path program 1 times [2022-11-02 20:39:04,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:04,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511713531] [2022-11-02 20:39:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:04,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:39:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:39:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:39:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 20:39:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 20:39:04,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511713531] [2022-11-02 20:39:04,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511713531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:04,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:04,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:04,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093191230] [2022-11-02 20:39:04,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:04,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:04,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:04,979 INFO L87 Difference]: Start difference. First operand 582 states and 778 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:39:05,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:05,461 INFO L93 Difference]: Finished difference Result 1034 states and 1386 transitions. [2022-11-02 20:39:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:39:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 104 [2022-11-02 20:39:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:05,465 INFO L225 Difference]: With dead ends: 1034 [2022-11-02 20:39:05,466 INFO L226 Difference]: Without dead ends: 460 [2022-11-02 20:39:05,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:39:05,471 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 104 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:05,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 545 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:39:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-02 20:39:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 378. [2022-11-02 20:39:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 319 states have (on average 1.3322884012539185) internal successors, (425), 321 states have internal predecessors, (425), 37 states have call successors, (37), 19 states have call predecessors, (37), 21 states have return successors, (43), 37 states have call predecessors, (43), 36 states have call successors, (43) [2022-11-02 20:39:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 505 transitions. [2022-11-02 20:39:05,511 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 505 transitions. Word has length 104 [2022-11-02 20:39:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:05,512 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 505 transitions. [2022-11-02 20:39:05,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:39:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 505 transitions. [2022-11-02 20:39:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-02 20:39:05,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:05,515 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2022-11-02 20:39:05,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:39:05,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash 335119820, now seen corresponding path program 2 times [2022-11-02 20:39:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824994028] [2022-11-02 20:39:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:05,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:05,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:39:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:05,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:39:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:05,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:39:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 20:39:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:39:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824994028] [2022-11-02 20:39:06,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824994028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:06,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:06,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:39:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767205380] [2022-11-02 20:39:06,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:06,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:39:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:39:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:39:06,132 INFO L87 Difference]: Start difference. First operand 378 states and 505 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:39:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:06,659 INFO L93 Difference]: Finished difference Result 748 states and 1012 transitions. [2022-11-02 20:39:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:39:06,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 104 [2022-11-02 20:39:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:06,666 INFO L225 Difference]: With dead ends: 748 [2022-11-02 20:39:06,667 INFO L226 Difference]: Without dead ends: 402 [2022-11-02 20:39:06,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:39:06,669 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 72 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:06,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 743 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:39:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-02 20:39:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 376. [2022-11-02 20:39:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 318 states have internal predecessors, (418), 37 states have call successors, (37), 19 states have call predecessors, (37), 22 states have return successors, (46), 38 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:39:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 501 transitions. [2022-11-02 20:39:06,730 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 501 transitions. Word has length 104 [2022-11-02 20:39:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:06,736 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 501 transitions. [2022-11-02 20:39:06,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:39:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 501 transitions. [2022-11-02 20:39:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:39:06,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:06,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-02 20:39:06,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:39:06,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:06,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1793628438, now seen corresponding path program 1 times [2022-11-02 20:39:06,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:06,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678058945] [2022-11-02 20:39:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:06,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:39:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:39:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:39:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 20:39:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:39:07,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:07,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678058945] [2022-11-02 20:39:07,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678058945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:07,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:07,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:39:07,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878096132] [2022-11-02 20:39:07,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:07,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:39:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:39:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:39:07,675 INFO L87 Difference]: Start difference. First operand 376 states and 501 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:39:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:08,856 INFO L93 Difference]: Finished difference Result 970 states and 1346 transitions. [2022-11-02 20:39:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:39:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2022-11-02 20:39:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:08,861 INFO L225 Difference]: With dead ends: 970 [2022-11-02 20:39:08,861 INFO L226 Difference]: Without dead ends: 626 [2022-11-02 20:39:08,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:39:08,864 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 150 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 2634 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:08,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 2634 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:39:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-11-02 20:39:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 382. [2022-11-02 20:39:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 321 states have (on average 1.3115264797507789) internal successors, (421), 322 states have internal predecessors, (421), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (47), 40 states have call predecessors, (47), 36 states have call successors, (47) [2022-11-02 20:39:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 505 transitions. [2022-11-02 20:39:08,914 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 505 transitions. Word has length 111 [2022-11-02 20:39:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:08,914 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 505 transitions. [2022-11-02 20:39:08,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:39:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 505 transitions. [2022-11-02 20:39:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-02 20:39:08,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:08,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-02 20:39:08,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:39:08,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:08,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1834540397, now seen corresponding path program 1 times [2022-11-02 20:39:08,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:08,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762145820] [2022-11-02 20:39:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:08,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:39:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:39:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:39:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 20:39:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-02 20:39:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:39:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:09,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762145820] [2022-11-02 20:39:09,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762145820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:09,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996382417] [2022-11-02 20:39:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:09,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:09,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:09,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:09,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:39:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:39:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:39:09,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:39:09,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996382417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:09,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:09,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2022-11-02 20:39:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611494395] [2022-11-02 20:39:09,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:09,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:39:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:39:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:39:09,974 INFO L87 Difference]: Start difference. First operand 382 states and 505 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-02 20:39:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:10,512 INFO L93 Difference]: Finished difference Result 800 states and 1076 transitions. [2022-11-02 20:39:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:39:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 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 117 [2022-11-02 20:39:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:10,516 INFO L225 Difference]: With dead ends: 800 [2022-11-02 20:39:10,516 INFO L226 Difference]: Without dead ends: 450 [2022-11-02 20:39:10,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:39:10,519 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 117 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:10,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 702 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:39:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-02 20:39:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2022-11-02 20:39:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 369 states have (on average 1.3035230352303524) internal successors, (481), 370 states have internal predecessors, (481), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (47), 40 states have call predecessors, (47), 36 states have call successors, (47) [2022-11-02 20:39:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 565 transitions. [2022-11-02 20:39:10,598 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 565 transitions. Word has length 117 [2022-11-02 20:39:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:10,599 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 565 transitions. [2022-11-02 20:39:10,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-02 20:39:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 565 transitions. [2022-11-02 20:39:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-02 20:39:10,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:10,604 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2022-11-02 20:39:10,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:10,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1065505129, now seen corresponding path program 2 times [2022-11-02 20:39:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:10,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432063303] [2022-11-02 20:39:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 20:39:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 20:39:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:39:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-02 20:39:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:39:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:39:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:11,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432063303] [2022-11-02 20:39:11,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432063303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:11,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943474703] [2022-11-02 20:39:11,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:11,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:11,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:11,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:11,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:39:11,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:39:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:11,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-02 20:39:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-02 20:39:12,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:12,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943474703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:12,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:12,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 29 [2022-11-02 20:39:12,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408267278] [2022-11-02 20:39:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:12,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:39:12,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:39:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:39:12,548 INFO L87 Difference]: Start difference. First operand 430 states and 565 transitions. Second operand has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:39:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:13,262 INFO L93 Difference]: Finished difference Result 1098 states and 1476 transitions. [2022-11-02 20:39:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:39:13,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 141 [2022-11-02 20:39:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:13,267 INFO L225 Difference]: With dead ends: 1098 [2022-11-02 20:39:13,267 INFO L226 Difference]: Without dead ends: 700 [2022-11-02 20:39:13,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:39:13,270 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 297 mSDsluCounter, 3499 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 3822 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:13,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 3822 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:39:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-02 20:39:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 440. [2022-11-02 20:39:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 377 states have (on average 1.297082228116711) internal successors, (489), 378 states have internal predecessors, (489), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (49), 42 states have call predecessors, (49), 38 states have call successors, (49) [2022-11-02 20:39:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 577 transitions. [2022-11-02 20:39:13,406 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 577 transitions. Word has length 141 [2022-11-02 20:39:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:13,407 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 577 transitions. [2022-11-02 20:39:13,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:39:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 577 transitions. [2022-11-02 20:39:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-02 20:39:13,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:13,412 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 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] [2022-11-02 20:39:13,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:13,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:13,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1149357710, now seen corresponding path program 1 times [2022-11-02 20:39:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:13,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879991714] [2022-11-02 20:39:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 20:39:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 20:39:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:39:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-02 20:39:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:39:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:39:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-02 20:39:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-02 20:39:13,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:13,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879991714] [2022-11-02 20:39:13,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879991714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:13,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:13,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:39:13,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038338079] [2022-11-02 20:39:13,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:13,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:39:13,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:13,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:39:13,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:13,988 INFO L87 Difference]: Start difference. First operand 440 states and 577 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-02 20:39:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:14,485 INFO L93 Difference]: Finished difference Result 673 states and 894 transitions. [2022-11-02 20:39:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 154 [2022-11-02 20:39:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:14,489 INFO L225 Difference]: With dead ends: 673 [2022-11-02 20:39:14,490 INFO L226 Difference]: Without dead ends: 462 [2022-11-02 20:39:14,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:39:14,491 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 167 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:14,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 567 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:39:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-02 20:39:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 442. [2022-11-02 20:39:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 379 states have (on average 1.2955145118733509) internal successors, (491), 380 states have internal predecessors, (491), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (49), 42 states have call predecessors, (49), 38 states have call successors, (49) [2022-11-02 20:39:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 579 transitions. [2022-11-02 20:39:14,573 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 579 transitions. Word has length 154 [2022-11-02 20:39:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:14,574 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 579 transitions. [2022-11-02 20:39:14,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-02 20:39:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 579 transitions. [2022-11-02 20:39:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-02 20:39:14,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:14,579 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 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] [2022-11-02 20:39:14,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:39:14,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:14,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1983743405, now seen corresponding path program 1 times [2022-11-02 20:39:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:14,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427286153] [2022-11-02 20:39:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:14,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 20:39:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 20:39:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:39:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-02 20:39:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:39:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:39:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-02 20:39:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-02 20:39:15,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427286153] [2022-11-02 20:39:15,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427286153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:15,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:15,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:39:15,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140283677] [2022-11-02 20:39:15,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:15,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:39:15,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:39:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:39:15,446 INFO L87 Difference]: Start difference. First operand 442 states and 579 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:39:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:16,602 INFO L93 Difference]: Finished difference Result 880 states and 1161 transitions. [2022-11-02 20:39:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:39:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-02 20:39:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:16,606 INFO L225 Difference]: With dead ends: 880 [2022-11-02 20:39:16,606 INFO L226 Difference]: Without dead ends: 470 [2022-11-02 20:39:16,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:39:16,609 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 513 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:16,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 808 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:39:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-02 20:39:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 440. [2022-11-02 20:39:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 377 states have (on average 1.2891246684350133) internal successors, (486), 378 states have internal predecessors, (486), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (48), 42 states have call predecessors, (48), 38 states have call successors, (48) [2022-11-02 20:39:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 573 transitions. [2022-11-02 20:39:16,688 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 573 transitions. Word has length 156 [2022-11-02 20:39:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:16,688 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 573 transitions. [2022-11-02 20:39:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:39:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 573 transitions. [2022-11-02 20:39:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-02 20:39:16,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:16,693 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:16,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:39:16,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2106669318, now seen corresponding path program 1 times [2022-11-02 20:39:16,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886842912] [2022-11-02 20:39:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:16,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 20:39:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 20:39:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:39:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-02 20:39:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:39:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-02 20:39:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-02 20:39:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-02 20:39:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:39:17,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:17,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886842912] [2022-11-02 20:39:17,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886842912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:17,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633967983] [2022-11-02 20:39:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:17,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:17,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:17,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:17,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:39:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:18,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:39:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 19 proven. 190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:39:18,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:39:18,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633967983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:18,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:18,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 30 [2022-11-02 20:39:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738284216] [2022-11-02 20:39:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:18,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:39:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:39:18,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:39:18,583 INFO L87 Difference]: Start difference. First operand 440 states and 573 transitions. Second operand has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:39:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:19,674 INFO L93 Difference]: Finished difference Result 966 states and 1287 transitions. [2022-11-02 20:39:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:39:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 168 [2022-11-02 20:39:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:19,678 INFO L225 Difference]: With dead ends: 966 [2022-11-02 20:39:19,679 INFO L226 Difference]: Without dead ends: 558 [2022-11-02 20:39:19,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=608, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:39:19,682 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 178 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:19,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1338 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:39:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-02 20:39:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 536. [2022-11-02 20:39:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 473 states have (on average 1.2811839323467231) internal successors, (606), 474 states have internal predecessors, (606), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (48), 42 states have call predecessors, (48), 38 states have call successors, (48) [2022-11-02 20:39:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 693 transitions. [2022-11-02 20:39:19,784 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 693 transitions. Word has length 168 [2022-11-02 20:39:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:19,784 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 693 transitions. [2022-11-02 20:39:19,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:39:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 693 transitions. [2022-11-02 20:39:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-02 20:39:19,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:19,789 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:19,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:19,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:39:19,999 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1303518258, now seen corresponding path program 2 times [2022-11-02 20:39:19,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:19,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996429851] [2022-11-02 20:39:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:20,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:21,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:21,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-02 20:39:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:21,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:39:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-02 20:39:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:21,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-02 20:39:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:21,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-02 20:39:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-02 20:39:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-02 20:39:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-11-02 20:39:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:39:22,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996429851] [2022-11-02 20:39:22,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996429851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:22,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475547184] [2022-11-02 20:39:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:22,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:22,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:39:22,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:39:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:39:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2022-11-02 20:39:22,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:22,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475547184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:22,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:22,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [30] total 31 [2022-11-02 20:39:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128596271] [2022-11-02 20:39:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:22,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:39:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:39:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:39:22,540 INFO L87 Difference]: Start difference. First operand 536 states and 693 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:39:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:22,712 INFO L93 Difference]: Finished difference Result 1346 states and 1766 transitions. [2022-11-02 20:39:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:39:22,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 216 [2022-11-02 20:39:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:22,717 INFO L225 Difference]: With dead ends: 1346 [2022-11-02 20:39:22,717 INFO L226 Difference]: Without dead ends: 842 [2022-11-02 20:39:22,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:39:22,720 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 83 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:22,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 471 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-02 20:39:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 532. [2022-11-02 20:39:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 471 states have (on average 1.2781316348195328) internal successors, (602), 472 states have internal predecessors, (602), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:39:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 685 transitions. [2022-11-02 20:39:22,824 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 685 transitions. Word has length 216 [2022-11-02 20:39:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:22,825 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 685 transitions. [2022-11-02 20:39:22,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:39:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 685 transitions. [2022-11-02 20:39:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-02 20:39:22,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:22,829 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:22,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:23,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:23,043 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1768078862, now seen corresponding path program 1 times [2022-11-02 20:39:23,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:23,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780732703] [2022-11-02 20:39:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:23,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-02 20:39:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:39:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-02 20:39:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-02 20:39:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-02 20:39:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-02 20:39:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-02 20:39:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-11-02 20:39:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:39:24,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:24,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780732703] [2022-11-02 20:39:24,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780732703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:24,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963858106] [2022-11-02 20:39:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:24,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:24,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:24,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:39:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:25,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:39:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 19 proven. 946 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:39:25,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:39:26,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963858106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:26,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:26,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 54 [2022-11-02 20:39:26,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564966472] [2022-11-02 20:39:26,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 20:39:26,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 20:39:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 20:39:26,889 INFO L87 Difference]: Start difference. First operand 532 states and 685 transitions. Second operand has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:39:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:28,018 INFO L93 Difference]: Finished difference Result 1246 states and 1653 transitions. [2022-11-02 20:39:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:39:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 216 [2022-11-02 20:39:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:28,023 INFO L225 Difference]: With dead ends: 1246 [2022-11-02 20:39:28,023 INFO L226 Difference]: Without dead ends: 746 [2022-11-02 20:39:28,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1198, Invalid=1772, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 20:39:28,029 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 512 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:28,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 967 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:39:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-02 20:39:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 724. [2022-11-02 20:39:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 663 states have (on average 1.2699849170437405) internal successors, (842), 664 states have internal predecessors, (842), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:39:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 925 transitions. [2022-11-02 20:39:28,157 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 925 transitions. Word has length 216 [2022-11-02 20:39:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:28,158 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 925 transitions. [2022-11-02 20:39:28,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:39:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 925 transitions. [2022-11-02 20:39:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-11-02 20:39:28,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:28,165 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:28,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:28,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:39:28,387 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1934856118, now seen corresponding path program 2 times [2022-11-02 20:39:28,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:28,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220587398] [2022-11-02 20:39:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-11-02 20:39:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-11-02 20:39:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-11-02 20:39:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-11-02 20:39:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-11-02 20:39:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-11-02 20:39:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2022-11-02 20:39:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2022-11-02 20:39:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:39:33,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220587398] [2022-11-02 20:39:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220587398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26635978] [2022-11-02 20:39:33,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:33,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:33,271 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:33,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:39:33,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:39:33,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:39:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:39:33,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4216 trivial. 0 not checked. [2022-11-02 20:39:33,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:39:33,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26635978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:33,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:39:33,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [54] total 57 [2022-11-02 20:39:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228056075] [2022-11-02 20:39:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:33,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=1994, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 20:39:33,884 INFO L87 Difference]: Start difference. First operand 724 states and 925 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 20:39:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:34,235 INFO L93 Difference]: Finished difference Result 1924 states and 2484 transitions. [2022-11-02 20:39:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:39:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 312 [2022-11-02 20:39:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:34,244 INFO L225 Difference]: With dead ends: 1924 [2022-11-02 20:39:34,244 INFO L226 Difference]: Without dead ends: 1228 [2022-11-02 20:39:34,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1202, Invalid=2104, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:39:34,249 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 84 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:34,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1018 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:39:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-11-02 20:39:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 726. [2022-11-02 20:39:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 665 states have (on average 1.2691729323308272) internal successors, (844), 666 states have internal predecessors, (844), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:39:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 927 transitions. [2022-11-02 20:39:34,385 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 927 transitions. Word has length 312 [2022-11-02 20:39:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:34,387 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 927 transitions. [2022-11-02 20:39:34,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 20:39:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 927 transitions. [2022-11-02 20:39:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-02 20:39:34,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:34,393 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:34,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:34,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:39:34,609 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:34,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1480488866, now seen corresponding path program 1 times [2022-11-02 20:39:34,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:34,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020519165] [2022-11-02 20:39:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:34,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-11-02 20:39:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-11-02 20:39:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-11-02 20:39:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-11-02 20:39:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-11-02 20:39:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-11-02 20:39:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2022-11-02 20:39:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2022-11-02 20:39:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 20:39:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020519165] [2022-11-02 20:39:39,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020519165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:39,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799401228] [2022-11-02 20:39:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:39,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:39,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:39,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:39,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:39:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:40,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:39:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 19 proven. 4186 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:39:40,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 20:39:44,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799401228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:44,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:44,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 49, 49] total 102 [2022-11-02 20:39:44,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613010667] [2022-11-02 20:39:44,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:44,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-02 20:39:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-02 20:39:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4672, Invalid=5630, Unknown=0, NotChecked=0, Total=10302 [2022-11-02 20:39:44,440 INFO L87 Difference]: Start difference. First operand 726 states and 927 transitions. Second operand has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:39:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:46,838 INFO L93 Difference]: Finished difference Result 1822 states and 2419 transitions. [2022-11-02 20:39:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-02 20:39:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 313 [2022-11-02 20:39:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:46,844 INFO L225 Difference]: With dead ends: 1822 [2022-11-02 20:39:46,845 INFO L226 Difference]: Without dead ends: 1128 [2022-11-02 20:39:46,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4678, Invalid=5828, Unknown=0, NotChecked=0, Total=10506 [2022-11-02 20:39:46,850 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 968 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:46,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 1384 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:39:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-02 20:39:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1110. [2022-11-02 20:39:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1049 states have (on average 1.2621544327931362) internal successors, (1324), 1050 states have internal predecessors, (1324), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:39:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1407 transitions. [2022-11-02 20:39:47,157 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1407 transitions. Word has length 313 [2022-11-02 20:39:47,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:47,159 INFO L495 AbstractCegarLoop]: Abstraction has 1110 states and 1407 transitions. [2022-11-02 20:39:47,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:39:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1407 transitions. [2022-11-02 20:39:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-11-02 20:39:47,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:47,177 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:47,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:39:47,403 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1574301454, now seen corresponding path program 2 times [2022-11-02 20:39:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:47,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153920888] [2022-11-02 20:39:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2022-11-02 20:39:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2022-11-02 20:39:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 421 [2022-11-02 20:39:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2022-11-02 20:39:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:39:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:39:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2022-11-02 20:39:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2022-11-02 20:39:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2022-11-02 20:39:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 481 [2022-11-02 20:39:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17616 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 20:39:59,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:59,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153920888] [2022-11-02 20:39:59,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153920888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:59,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195520624] [2022-11-02 20:39:59,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:39:59,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:59,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:59,542 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:59,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:40:00,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:40:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:40:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17616 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17609 trivial. 0 not checked. [2022-11-02 20:40:00,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:40:00,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195520624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:00,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:40:00,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [102] total 105 [2022-11-02 20:40:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382050457] [2022-11-02 20:40:00,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:00,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:40:00,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:00,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:40:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2022-11-02 20:40:00,468 INFO L87 Difference]: Start difference. First operand 1110 states and 1407 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 20:40:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:01,062 INFO L93 Difference]: Finished difference Result 3078 states and 3928 transitions. [2022-11-02 20:40:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:40:01,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 505 [2022-11-02 20:40:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:01,072 INFO L225 Difference]: With dead ends: 3078 [2022-11-02 20:40:01,072 INFO L226 Difference]: Without dead ends: 1998 [2022-11-02 20:40:01,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4682, Invalid=6448, Unknown=0, NotChecked=0, Total=11130 [2022-11-02 20:40:01,079 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 83 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:01,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1018 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-11-02 20:40:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1112. [2022-11-02 20:40:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1051 states have (on average 1.2616555661274975) internal successors, (1326), 1052 states have internal predecessors, (1326), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:40:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1409 transitions. [2022-11-02 20:40:01,337 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1409 transitions. Word has length 505 [2022-11-02 20:40:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:01,338 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1409 transitions. [2022-11-02 20:40:01,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 20:40:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1409 transitions. [2022-11-02 20:40:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-11-02 20:40:01,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:01,353 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:01,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:01,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:40:01,567 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash -249914232, now seen corresponding path program 1 times [2022-11-02 20:40:01,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:01,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131207589] [2022-11-02 20:40:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2022-11-02 20:40:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2022-11-02 20:40:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 421 [2022-11-02 20:40:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2022-11-02 20:40:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:40:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:40:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2022-11-02 20:40:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2022-11-02 20:40:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2022-11-02 20:40:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2022-11-02 20:40:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:40:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:12,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131207589] [2022-11-02 20:40:12,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131207589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:12,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018791990] [2022-11-02 20:40:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:12,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:12,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:40:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2961 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-02 20:40:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 19 proven. 17578 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:40:14,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:40:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018791990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:27,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:27,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 97, 97] total 198 [2022-11-02 20:40:27,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321593875] [2022-11-02 20:40:27,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:27,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-11-02 20:40:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:27,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-11-02 20:40:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18544, Invalid=20462, Unknown=0, NotChecked=0, Total=39006 [2022-11-02 20:40:27,697 INFO L87 Difference]: Start difference. First operand 1112 states and 1409 transitions. Second operand has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:40:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:36,082 INFO L93 Difference]: Finished difference Result 2974 states and 3953 transitions. [2022-11-02 20:40:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-11-02 20:40:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 506 [2022-11-02 20:40:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:36,091 INFO L225 Difference]: With dead ends: 2974 [2022-11-02 20:40:36,091 INFO L226 Difference]: Without dead ends: 1894 [2022-11-02 20:40:36,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=18550, Invalid=20852, Unknown=0, NotChecked=0, Total=39402 [2022-11-02 20:40:36,098 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1839 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:36,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 1895 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-02 20:40:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2022-11-02 20:40:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1880. [2022-11-02 20:40:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1819 states have (on average 1.2567344694887301) internal successors, (2286), 1820 states have internal predecessors, (2286), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:40:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2369 transitions. [2022-11-02 20:40:36,417 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2369 transitions. Word has length 506 [2022-11-02 20:40:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:36,418 INFO L495 AbstractCegarLoop]: Abstraction has 1880 states and 2369 transitions. [2022-11-02 20:40:36,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:40:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2369 transitions. [2022-11-02 20:40:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 891 [2022-11-02 20:40:36,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:36,429 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:36,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:36,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:36,643 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash 164952872, now seen corresponding path program 2 times [2022-11-02 20:40:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650453956] [2022-11-02 20:40:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 784 [2022-11-02 20:41:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 790 [2022-11-02 20:41:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 805 [2022-11-02 20:41:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 812 [2022-11-02 20:41:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:41:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:41:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:16,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 836 [2022-11-02 20:41:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:16,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2022-11-02 20:41:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 855 [2022-11-02 20:41:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:16,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 866 [2022-11-02 20:41:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72049 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:41:16,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650453956] [2022-11-02 20:41:16,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650453956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120799972] [2022-11-02 20:41:16,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:16,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:16,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:16,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:41:17,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:41:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 4977 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-02 20:41:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72049 backedges. 19 proven. 72010 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:41:19,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72049 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:41:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120799972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:45,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:45,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 193, 193] total 264 [2022-11-02 20:41:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885594111] [2022-11-02 20:41:45,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:45,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 264 states [2022-11-02 20:41:45,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 264 interpolants. [2022-11-02 20:41:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33427, Invalid=36005, Unknown=0, NotChecked=0, Total=69432 [2022-11-02 20:41:45,822 INFO L87 Difference]: Start difference. First operand 1880 states and 2369 transitions. Second operand has 264 states, 264 states have (on average 4.393939393939394) internal successors, (1160), 259 states have internal predecessors, (1160), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:42:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:04,190 INFO L93 Difference]: Finished difference Result 4270 states and 5513 transitions. [2022-11-02 20:42:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-11-02 20:42:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 264 states, 264 states have (on average 4.393939393939394) internal successors, (1160), 259 states have internal predecessors, (1160), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 890 [2022-11-02 20:42:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:04,201 INFO L225 Difference]: With dead ends: 4270 [2022-11-02 20:42:04,201 INFO L226 Difference]: Without dead ends: 2422 [2022-11-02 20:42:04,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1606 SyntacticMatches, 126 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18176 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=33433, Invalid=36527, Unknown=0, NotChecked=0, Total=69960 [2022-11-02 20:42:04,210 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 2204 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:04,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2205 Valid, 1916 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 20:42:04,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2022-11-02 20:42:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2408. [2022-11-02 20:42:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2347 states have (on average 1.2552194290583725) internal successors, (2946), 2348 states have internal predecessors, (2946), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2022-11-02 20:42:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3029 transitions. [2022-11-02 20:42:04,617 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3029 transitions. Word has length 890 [2022-11-02 20:42:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:04,619 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 3029 transitions. [2022-11-02 20:42:04,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 264 states, 264 states have (on average 4.393939393939394) internal successors, (1160), 259 states have internal predecessors, (1160), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-02 20:42:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3029 transitions. [2022-11-02 20:42:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1155 [2022-11-02 20:42:04,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:04,634 INFO L195 NwaCegarLoop]: trace histogram [256, 256, 256, 256, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:04,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:04,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19a51792-a88f-4d20-bb05-b1b3b5c6e475/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:04,851 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash -166726346, now seen corresponding path program 3 times [2022-11-02 20:42:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:04,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090888561] [2022-11-02 20:42:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1048 [2022-11-02 20:42:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1054 [2022-11-02 20:42:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1069 [2022-11-02 20:42:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1076 [2022-11-02 20:42:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:42:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1100 [2022-11-02 20:42:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1111 [2022-11-02 20:42:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1119 [2022-11-02 20:42:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1130 [2022-11-02 20:42:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 130855 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 130848 trivial. 0 not checked. [2022-11-02 20:42:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090888561] [2022-11-02 20:42:08,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090888561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:08,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:08,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 20:42:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176537829] [2022-11-02 20:42:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:08,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:42:08,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:42:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:08,446 INFO L87 Difference]: Start difference. First operand 2408 states and 3029 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 8 states have internal predecessors, (99), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:42:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:10,076 INFO L93 Difference]: Finished difference Result 4846 states and 6105 transitions. [2022-11-02 20:42:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:42:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 8 states have internal predecessors, (99), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 1154 [2022-11-02 20:42:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:10,091 INFO L225 Difference]: With dead ends: 4846 [2022-11-02 20:42:10,092 INFO L226 Difference]: Without dead ends: 3649 [2022-11-02 20:42:10,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:42:10,096 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1233 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:10,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 1429 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:42:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2022-11-02 20:42:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 3601. [2022-11-02 20:42:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3511 states have (on average 1.2560524067217318) internal successors, (4410), 3514 states have internal predecessors, (4410), 54 states have call successors, (54), 27 states have call predecessors, (54), 35 states have return successors, (69), 59 states have call predecessors, (69), 53 states have call successors, (69) [2022-11-02 20:42:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 4533 transitions. [2022-11-02 20:42:10,718 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 4533 transitions. Word has length 1154 [2022-11-02 20:42:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:10,721 INFO L495 AbstractCegarLoop]: Abstraction has 3601 states and 4533 transitions. [2022-11-02 20:42:10,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 8 states have internal predecessors, (99), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:42:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 4533 transitions. [2022-11-02 20:42:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1157 [2022-11-02 20:42:10,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:10,736 INFO L195 NwaCegarLoop]: trace histogram [256, 256, 256, 256, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:10,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:42:10,737 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash 263245175, now seen corresponding path program 1 times [2022-11-02 20:42:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:10,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417406682] [2022-11-02 20:42:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1048 [2022-11-02 20:42:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1054 [2022-11-02 20:42:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1069 [2022-11-02 20:42:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1076 [2022-11-02 20:42:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:42:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1100 [2022-11-02 20:42:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1111 [2022-11-02 20:42:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1119 [2022-11-02 20:42:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1130 [2022-11-02 20:42:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 130855 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 130848 trivial. 0 not checked. [2022-11-02 20:42:12,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:12,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417406682] [2022-11-02 20:42:12,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417406682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:12,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:12,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:42:12,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250602468] [2022-11-02 20:42:12,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:12,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:42:12,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:12,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:42:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:42:12,627 INFO L87 Difference]: Start difference. First operand 3601 states and 4533 transitions. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-02 20:42:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:13,431 INFO L93 Difference]: Finished difference Result 6010 states and 7577 transitions. [2022-11-02 20:42:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:42:13,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 1156 [2022-11-02 20:42:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:13,448 INFO L225 Difference]: With dead ends: 6010 [2022-11-02 20:42:13,449 INFO L226 Difference]: Without dead ends: 3623 [2022-11-02 20:42:13,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:13,454 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 96 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:13,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 906 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:42:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states.