./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro --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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- 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-8393723 [2022-11-18 20:43:44,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:43:44,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:43:44,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:43:44,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:43:44,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:43:44,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:43:44,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:43:44,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:43:44,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:43:44,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:43:44,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:43:44,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:43:44,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:43:44,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:43:44,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:43:44,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:43:44,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:43:44,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:43:44,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:43:44,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:43:44,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:43:44,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:43:44,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:43:44,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:43:44,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:43:44,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:43:44,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:43:44,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:43:44,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:43:44,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:43:44,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:43:44,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:43:44,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:43:44,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:43:44,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:43:44,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:43:44,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:43:44,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:43:44,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:43:44,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:43:44,582 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:43:44,621 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:43:44,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:43:44,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:43:44,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:43:44,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:43:44,623 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:43:44,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:43:44,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:43:44,625 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:43:44,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:43:44,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:43:44,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:43:44,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:43:44,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:43:44,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:43:44,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:43:44,627 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:43:44,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:43:44,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:43:44,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:43:44,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:43:44,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:43:44,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:43:44,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:43:44,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:43:44,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:43:44,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:43:44,629 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:43:44,630 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:43:44,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:43:44,630 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_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2022-11-18 20:43:44,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:43:44,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:43:44,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:43:44,988 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:43:44,989 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:43:45,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-18 20:43:45,086 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/data/e8e4f33b1/7082dead1ab94e6f93b4695490052176/FLAG1bc186ced [2022-11-18 20:43:45,999 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:43:46,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-18 20:43:46,047 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/data/e8e4f33b1/7082dead1ab94e6f93b4695490052176/FLAG1bc186ced [2022-11-18 20:43:46,528 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/data/e8e4f33b1/7082dead1ab94e6f93b4695490052176 [2022-11-18 20:43:46,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:43:46,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:43:46,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:43:46,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:43:46,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:43:46,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:43:46" (1/1) ... [2022-11-18 20:43:46,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b64d776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:46, skipping insertion in model container [2022-11-18 20:43:46,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:43:46" (1/1) ... [2022-11-18 20:43:46,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:43:46,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:43:47,774 WARN L234 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_cccfcd33-7b20-4189-91ec-84b2f7091eb2/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-11-18 20:43:48,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:43:48,579 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:43:48,758 WARN L234 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_cccfcd33-7b20-4189-91ec-84b2f7091eb2/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-11-18 20:43:48,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:43:48,986 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:43:48,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48 WrapperNode [2022-11-18 20:43:48,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:43:48,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:43:48,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:43:48,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:43:49,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,304 INFO L138 Inliner]: procedures = 175, calls = 797, calls flagged for inlining = 84, calls inlined = 84, statements flattened = 2228 [2022-11-18 20:43:49,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:43:49,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:43:49,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:43:49,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:43:49,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:43:49,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:43:49,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:43:49,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:43:49,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (1/1) ... [2022-11-18 20:43:49,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:43:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:49,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:43:49,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:43:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-18 20:43:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-18 20:43:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-18 20:43:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-18 20:43:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-18 20:43:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-18 20:43:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2022-11-18 20:43:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2022-11-18 20:43:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-18 20:43:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-18 20:43:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-18 20:43:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-18 20:43:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-18 20:43:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-18 20:43:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-18 20:43:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-18 20:43:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-18 20:43:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:43:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-18 20:43:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-18 20:43:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-18 20:43:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-18 20:43:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-18 20:43:49,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-18 20:43:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-18 20:43:49,730 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-18 20:43:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-18 20:43:49,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-18 20:43:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-18 20:43:49,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-18 20:43:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-18 20:43:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-18 20:43:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2022-11-18 20:43:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2022-11-18 20:43:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-18 20:43:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-18 20:43:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-18 20:43:49,732 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-18 20:43:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:43:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-18 20:43:49,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-18 20:43:49,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-18 20:43:49,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-18 20:43:49,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-18 20:43:49,733 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-18 20:43:49,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:43:49,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:43:49,733 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-18 20:43:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-18 20:43:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:43:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-18 20:43:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-18 20:43:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-18 20:43:49,735 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-18 20:43:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:43:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-18 20:43:49,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-18 20:43:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:43:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:43:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-18 20:43:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-18 20:43:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-18 20:43:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-18 20:43:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-18 20:43:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-18 20:43:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:43:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-18 20:43:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-18 20:43:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-18 20:43:49,741 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-18 20:43:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-18 20:43:49,741 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-18 20:43:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2022-11-18 20:43:49,741 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2022-11-18 20:43:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:43:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 20:43:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2022-11-18 20:43:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2022-11-18 20:43:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-18 20:43:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-18 20:43:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-18 20:43:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-18 20:43:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-18 20:43:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-18 20:43:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-18 20:43:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-18 20:43:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-18 20:43:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-18 20:43:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-18 20:43:49,746 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-18 20:43:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:43:49,747 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-18 20:43:49,747 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-18 20:43:49,747 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-18 20:43:49,747 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-18 20:43:49,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-18 20:43:49,748 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2022-11-18 20:43:49,749 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2022-11-18 20:43:49,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-18 20:43:49,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-18 20:43:49,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:43:49,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:43:49,750 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2022-11-18 20:43:49,750 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2022-11-18 20:43:50,440 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:43:50,446 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:43:50,745 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-18 20:43:51,514 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-18 20:43:56,472 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:43:56,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:43:56,484 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-18 20:43:56,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:43:56 BoogieIcfgContainer [2022-11-18 20:43:56,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:43:56,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:43:56,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:43:56,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:43:56,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:43:46" (1/3) ... [2022-11-18 20:43:56,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a08c712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:43:56, skipping insertion in model container [2022-11-18 20:43:56,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:48" (2/3) ... [2022-11-18 20:43:56,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a08c712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:43:56, skipping insertion in model container [2022-11-18 20:43:56,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:43:56" (3/3) ... [2022-11-18 20:43:56,500 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-18 20:43:56,518 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:43:56,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:43:56,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:43:56,622 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;@446a261a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:43:56,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:43:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 659 states, 483 states have (on average 1.339544513457557) internal successors, (647), 502 states have internal predecessors, (647), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2022-11-18 20:43:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:43:56,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:56,654 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:43:56,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash -878443670, now seen corresponding path program 1 times [2022-11-18 20:43:56,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:56,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510808013] [2022-11-18 20:43:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:56,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:57,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:43:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:57,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:43:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:43:57,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:57,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510808013] [2022-11-18 20:43:57,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510808013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:43:57,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:43:57,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:43:57,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693686730] [2022-11-18 20:43:57,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:57,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:43:57,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:43:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:43:57,391 INFO L87 Difference]: Start difference. First operand has 659 states, 483 states have (on average 1.339544513457557) internal successors, (647), 502 states have internal predecessors, (647), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:44:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:02,943 INFO L93 Difference]: Finished difference Result 2039 states and 2896 transitions. [2022-11-18 20:44:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:44:02,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-18 20:44:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:02,991 INFO L225 Difference]: With dead ends: 2039 [2022-11-18 20:44:02,999 INFO L226 Difference]: Without dead ends: 1361 [2022-11-18 20:44:03,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:03,017 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 1137 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:03,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1243 Valid, 1895 Invalid, 1122 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [346 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-18 20:44:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-11-18 20:44:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1255. [2022-11-18 20:44:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 929 states have (on average 1.3164693218514532) internal successors, (1223), 947 states have internal predecessors, (1223), 243 states have call successors, (243), 83 states have call predecessors, (243), 82 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) [2022-11-18 20:44:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1704 transitions. [2022-11-18 20:44:03,290 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1704 transitions. Word has length 28 [2022-11-18 20:44:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:03,291 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1704 transitions. [2022-11-18 20:44:03,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:44:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1704 transitions. [2022-11-18 20:44:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:44:03,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:03,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:03,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:44:03,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 863297475, now seen corresponding path program 1 times [2022-11-18 20:44:03,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:03,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107401323] [2022-11-18 20:44:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:03,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:03,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:03,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:44:03,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:03,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107401323] [2022-11-18 20:44:03,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107401323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:03,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:03,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:44:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850561252] [2022-11-18 20:44:03,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:03,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:44:03,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:03,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:44:03,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:44:03,973 INFO L87 Difference]: Start difference. First operand 1255 states and 1704 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:05,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:44:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:09,641 INFO L93 Difference]: Finished difference Result 3962 states and 5495 transitions. [2022-11-18 20:44:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:44:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-11-18 20:44:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:09,661 INFO L225 Difference]: With dead ends: 3962 [2022-11-18 20:44:09,661 INFO L226 Difference]: Without dead ends: 2714 [2022-11-18 20:44:09,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:09,674 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 1047 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:09,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 2306 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-18 20:44:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-11-18 20:44:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2492. [2022-11-18 20:44:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 1848 states have (on average 1.3149350649350648) internal successors, (2430), 1880 states have internal predecessors, (2430), 479 states have call successors, (479), 165 states have call predecessors, (479), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-18 20:44:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3397 transitions. [2022-11-18 20:44:09,887 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3397 transitions. Word has length 38 [2022-11-18 20:44:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:09,888 INFO L495 AbstractCegarLoop]: Abstraction has 2492 states and 3397 transitions. [2022-11-18 20:44:09,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3397 transitions. [2022-11-18 20:44:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:44:09,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:09,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:09,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:44:09,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash 992051553, now seen corresponding path program 1 times [2022-11-18 20:44:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:09,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462164303] [2022-11-18 20:44:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:10,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:10,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:10,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:44:10,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:10,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462164303] [2022-11-18 20:44:10,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462164303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:10,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:10,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:44:10,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959633172] [2022-11-18 20:44:10,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:10,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:44:10,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:44:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:44:10,283 INFO L87 Difference]: Start difference. First operand 2492 states and 3397 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:14,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:44:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:15,049 INFO L93 Difference]: Finished difference Result 2706 states and 3776 transitions. [2022-11-18 20:44:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:44:15,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-18 20:44:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:15,065 INFO L225 Difference]: With dead ends: 2706 [2022-11-18 20:44:15,065 INFO L226 Difference]: Without dead ends: 2703 [2022-11-18 20:44:15,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:15,074 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 964 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:15,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 1104 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-18 20:44:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2022-11-18 20:44:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2491. [2022-11-18 20:44:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1848 states have (on average 1.3143939393939394) internal successors, (2429), 1879 states have internal predecessors, (2429), 478 states have call successors, (478), 165 states have call predecessors, (478), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-18 20:44:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3395 transitions. [2022-11-18 20:44:15,267 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3395 transitions. Word has length 39 [2022-11-18 20:44:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:15,268 INFO L495 AbstractCegarLoop]: Abstraction has 2491 states and 3395 transitions. [2022-11-18 20:44:15,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3395 transitions. [2022-11-18 20:44:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 20:44:15,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:15,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:15,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:44:15,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash 688465542, now seen corresponding path program 1 times [2022-11-18 20:44:15,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:15,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003535898] [2022-11-18 20:44:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:15,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:15,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:15,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:15,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:44:15,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:15,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003535898] [2022-11-18 20:44:15,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003535898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:15,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:15,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:44:15,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254055300] [2022-11-18 20:44:15,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:15,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:44:15,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:44:15,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:44:15,526 INFO L87 Difference]: Start difference. First operand 2491 states and 3395 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:17,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:44:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:19,693 INFO L93 Difference]: Finished difference Result 2705 states and 3774 transitions. [2022-11-18 20:44:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:44:19,694 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-18 20:44:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:19,711 INFO L225 Difference]: With dead ends: 2705 [2022-11-18 20:44:19,712 INFO L226 Difference]: Without dead ends: 2702 [2022-11-18 20:44:19,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:19,717 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 959 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:19,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 1103 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-18 20:44:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2022-11-18 20:44:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2490. [2022-11-18 20:44:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1848 states have (on average 1.3138528138528138) internal successors, (2428), 1878 states have internal predecessors, (2428), 477 states have call successors, (477), 165 states have call predecessors, (477), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-18 20:44:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3393 transitions. [2022-11-18 20:44:19,917 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3393 transitions. Word has length 40 [2022-11-18 20:44:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:19,920 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3393 transitions. [2022-11-18 20:44:19,921 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3393 transitions. [2022-11-18 20:44:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:44:19,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:19,923 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:19,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:44:19,923 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash -132761340, now seen corresponding path program 1 times [2022-11-18 20:44:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772367824] [2022-11-18 20:44:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:19,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:20,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:20,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:20,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:44:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772367824] [2022-11-18 20:44:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772367824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:20,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:20,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:44:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092889548] [2022-11-18 20:44:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:44:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:44:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:44:20,118 INFO L87 Difference]: Start difference. First operand 2490 states and 3393 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:24,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:44:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:24,696 INFO L93 Difference]: Finished difference Result 2704 states and 3772 transitions. [2022-11-18 20:44:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:44:24,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-11-18 20:44:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:24,713 INFO L225 Difference]: With dead ends: 2704 [2022-11-18 20:44:24,713 INFO L226 Difference]: Without dead ends: 2701 [2022-11-18 20:44:24,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:24,716 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 958 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:24,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 1098 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 20:44:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-11-18 20:44:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2489. [2022-11-18 20:44:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 1848 states have (on average 1.3133116883116882) internal successors, (2427), 1877 states have internal predecessors, (2427), 476 states have call successors, (476), 165 states have call predecessors, (476), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-18 20:44:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 3391 transitions. [2022-11-18 20:44:24,917 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 3391 transitions. Word has length 41 [2022-11-18 20:44:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:24,917 INFO L495 AbstractCegarLoop]: Abstraction has 2489 states and 3391 transitions. [2022-11-18 20:44:24,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 3391 transitions. [2022-11-18 20:44:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 20:44:24,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:24,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:24,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:44:24,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash 179013961, now seen corresponding path program 1 times [2022-11-18 20:44:24,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:24,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354530271] [2022-11-18 20:44:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:24,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:25,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:25,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:44:25,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354530271] [2022-11-18 20:44:25,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354530271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:25,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:25,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:44:25,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949686601] [2022-11-18 20:44:25,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:25,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:44:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:44:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:44:25,095 INFO L87 Difference]: Start difference. First operand 2489 states and 3391 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:26,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:44:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:29,363 INFO L93 Difference]: Finished difference Result 2703 states and 3770 transitions. [2022-11-18 20:44:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:44:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-11-18 20:44:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:29,378 INFO L225 Difference]: With dead ends: 2703 [2022-11-18 20:44:29,378 INFO L226 Difference]: Without dead ends: 2691 [2022-11-18 20:44:29,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:29,382 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 955 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:29,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 1095 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-18 20:44:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-11-18 20:44:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2479. [2022-11-18 20:44:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 1839 states have (on average 1.3126699293094073) internal successors, (2414), 1867 states have internal predecessors, (2414), 475 states have call successors, (475), 165 states have call predecessors, (475), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-18 20:44:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3377 transitions. [2022-11-18 20:44:29,581 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3377 transitions. Word has length 42 [2022-11-18 20:44:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:29,583 INFO L495 AbstractCegarLoop]: Abstraction has 2479 states and 3377 transitions. [2022-11-18 20:44:29,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:44:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3377 transitions. [2022-11-18 20:44:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 20:44:29,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:29,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:29,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:44:29,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 504205047, now seen corresponding path program 1 times [2022-11-18 20:44:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:29,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102182225] [2022-11-18 20:44:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 20:44:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 20:44:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:44:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:44:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 20:44:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:44:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:29,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102182225] [2022-11-18 20:44:29,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102182225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:29,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:29,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:44:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095511768] [2022-11-18 20:44:29,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:29,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:44:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:44:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:44:29,886 INFO L87 Difference]: Start difference. First operand 2479 states and 3377 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:44:33,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:44:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:39,617 INFO L93 Difference]: Finished difference Result 6060 states and 8291 transitions. [2022-11-18 20:44:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:44:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 82 [2022-11-18 20:44:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:39,636 INFO L225 Difference]: With dead ends: 6060 [2022-11-18 20:44:39,636 INFO L226 Difference]: Without dead ends: 3588 [2022-11-18 20:44:39,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:44:39,646 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 686 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:39,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 2336 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-18 20:44:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-11-18 20:44:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3272. [2022-11-18 20:44:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2436 states have (on average 1.2947454844006567) internal successors, (3154), 2472 states have internal predecessors, (3154), 598 states have call successors, (598), 232 states have call predecessors, (598), 237 states have return successors, (629), 595 states have call predecessors, (629), 597 states have call successors, (629) [2022-11-18 20:44:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 4381 transitions. [2022-11-18 20:44:39,936 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 4381 transitions. Word has length 82 [2022-11-18 20:44:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:39,936 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 4381 transitions. [2022-11-18 20:44:39,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:44:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 4381 transitions. [2022-11-18 20:44:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 20:44:39,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:39,941 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:44:39,942 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1260517544, now seen corresponding path program 1 times [2022-11-18 20:44:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:39,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081062378] [2022-11-18 20:44:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:39,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:44:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 20:44:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:44:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:44:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:44:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:44:40,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:40,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081062378] [2022-11-18 20:44:40,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081062378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:40,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:40,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:44:40,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908629362] [2022-11-18 20:44:40,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:40,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:44:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:44:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:44:40,209 INFO L87 Difference]: Start difference. First operand 3272 states and 4381 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-18 20:44:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:49,720 INFO L93 Difference]: Finished difference Result 7692 states and 10393 transitions. [2022-11-18 20:44:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:44:49,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 98 [2022-11-18 20:44:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:49,739 INFO L225 Difference]: With dead ends: 7692 [2022-11-18 20:44:49,740 INFO L226 Difference]: Without dead ends: 4434 [2022-11-18 20:44:49,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:44:49,750 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 632 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:49,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 2658 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-11-18 20:44:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2022-11-18 20:44:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4082. [2022-11-18 20:44:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4082 states, 3060 states have (on average 1.2862745098039217) internal successors, (3936), 3100 states have internal predecessors, (3936), 718 states have call successors, (718), 298 states have call predecessors, (718), 303 states have return successors, (749), 715 states have call predecessors, (749), 717 states have call successors, (749) [2022-11-18 20:44:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4082 states to 4082 states and 5403 transitions. [2022-11-18 20:44:50,084 INFO L78 Accepts]: Start accepts. Automaton has 4082 states and 5403 transitions. Word has length 98 [2022-11-18 20:44:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:50,084 INFO L495 AbstractCegarLoop]: Abstraction has 4082 states and 5403 transitions. [2022-11-18 20:44:50,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-18 20:44:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4082 states and 5403 transitions. [2022-11-18 20:44:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-18 20:44:50,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:50,095 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:44:50,096 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1570548632, now seen corresponding path program 1 times [2022-11-18 20:44:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:50,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320956451] [2022-11-18 20:44:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:50,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:44:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 20:44:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 20:44:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:44:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:44:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:44:50,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320956451] [2022-11-18 20:44:50,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320956451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593312297] [2022-11-18 20:44:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:50,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:50,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:50,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:44:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:51,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:44:51,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:44:51,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:44:51,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593312297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:51,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:44:51,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-18 20:44:51,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459835673] [2022-11-18 20:44:51,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:51,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:44:51,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:44:51,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:44:51,260 INFO L87 Difference]: Start difference. First operand 4082 states and 5403 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:44:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:51,766 INFO L93 Difference]: Finished difference Result 9832 states and 12970 transitions. [2022-11-18 20:44:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:44:51,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2022-11-18 20:44:51,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:51,801 INFO L225 Difference]: With dead ends: 9832 [2022-11-18 20:44:51,801 INFO L226 Difference]: Without dead ends: 5764 [2022-11-18 20:44:51,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:44:51,814 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 686 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:51,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1673 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:44:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2022-11-18 20:44:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 5756. [2022-11-18 20:44:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5756 states, 4340 states have (on average 1.294930875576037) internal successors, (5620), 4404 states have internal predecessors, (5620), 952 states have call successors, (952), 452 states have call predecessors, (952), 463 states have return successors, (997), 947 states have call predecessors, (997), 951 states have call successors, (997) [2022-11-18 20:44:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 7569 transitions. [2022-11-18 20:44:52,284 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 7569 transitions. Word has length 110 [2022-11-18 20:44:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:52,286 INFO L495 AbstractCegarLoop]: Abstraction has 5756 states and 7569 transitions. [2022-11-18 20:44:52,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:44:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 7569 transitions. [2022-11-18 20:44:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-18 20:44:52,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:52,292 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-18 20:44:52,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:52,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:52,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash -820473403, now seen corresponding path program 1 times [2022-11-18 20:44:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:52,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398581385] [2022-11-18 20:44:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:44:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:44:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:44:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:44:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:44:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:44:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 20:44:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 20:44:52,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398581385] [2022-11-18 20:44:52,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398581385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:52,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231763310] [2022-11-18 20:44:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:52,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:52,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:52,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:44:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:44:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:44:53,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:44:53,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231763310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:53,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:44:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-11-18 20:44:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183985190] [2022-11-18 20:44:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:44:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:44:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:44:53,716 INFO L87 Difference]: Start difference. First operand 5756 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 20:44:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:55,973 INFO L93 Difference]: Finished difference Result 17242 states and 22674 transitions. [2022-11-18 20:44:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:44:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-18 20:44:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:56,034 INFO L225 Difference]: With dead ends: 17242 [2022-11-18 20:44:56,034 INFO L226 Difference]: Without dead ends: 17234 [2022-11-18 20:44:56,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:44:56,041 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 2061 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2061 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:56,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2061 Valid, 2728 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:44:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17234 states. [2022-11-18 20:44:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17234 to 17204. [2022-11-18 20:44:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 12968 states have (on average 1.2956508328192473) internal successors, (16802), 13176 states have internal predecessors, (16802), 2848 states have call successors, (2848), 1352 states have call predecessors, (2848), 1387 states have return successors, (2985), 2819 states have call predecessors, (2985), 2847 states have call successors, (2985) [2022-11-18 20:44:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 22635 transitions. [2022-11-18 20:44:57,270 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 22635 transitions. Word has length 121 [2022-11-18 20:44:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:57,271 INFO L495 AbstractCegarLoop]: Abstraction has 17204 states and 22635 transitions. [2022-11-18 20:44:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 20:44:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 22635 transitions. [2022-11-18 20:44:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-18 20:44:57,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:57,293 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:57,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:57,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:44:57,502 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1046181982, now seen corresponding path program 1 times [2022-11-18 20:44:57,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:57,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444744491] [2022-11-18 20:44:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:57,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:44:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:57,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:44:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:57,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:44:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:57,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:44:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:57,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:44:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:57,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:44:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:58,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:44:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:58,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:44:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:58,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:44:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:58,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 20:44:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:58,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-18 20:44:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 20:44:58,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:58,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444744491] [2022-11-18 20:44:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444744491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220825598] [2022-11-18 20:44:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:58,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:58,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:58,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:44:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:44:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:44:58,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:44:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220825598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:58,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:44:58,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-18 20:44:58,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258007633] [2022-11-18 20:44:58,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:58,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:44:58,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:44:58,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:44:58,871 INFO L87 Difference]: Start difference. First operand 17204 states and 22635 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-18 20:44:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:59,998 INFO L93 Difference]: Finished difference Result 26220 states and 34492 transitions. [2022-11-18 20:44:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:44:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-11-18 20:44:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:00,028 INFO L225 Difference]: With dead ends: 26220 [2022-11-18 20:45:00,028 INFO L226 Difference]: Without dead ends: 8482 [2022-11-18 20:45:00,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:45:00,067 INFO L413 NwaCegarLoop]: 1034 mSDtfsCounter, 763 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:00,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 1287 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:45:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2022-11-18 20:45:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 8482. [2022-11-18 20:45:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 6387 states have (on average 1.2921559417566932) internal successors, (8253), 6491 states have internal predecessors, (8253), 1408 states have call successors, (1408), 669 states have call predecessors, (1408), 686 states have return successors, (1476), 1393 states have call predecessors, (1476), 1407 states have call successors, (1476) [2022-11-18 20:45:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 11137 transitions. [2022-11-18 20:45:00,710 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 11137 transitions. Word has length 131 [2022-11-18 20:45:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:00,711 INFO L495 AbstractCegarLoop]: Abstraction has 8482 states and 11137 transitions. [2022-11-18 20:45:00,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-18 20:45:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 11137 transitions. [2022-11-18 20:45:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-18 20:45:00,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:00,721 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:00,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:00,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 233374278, now seen corresponding path program 1 times [2022-11-18 20:45:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:00,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490989465] [2022-11-18 20:45:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:45:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:45:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:45:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:45:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:45:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:45:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:45:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:45:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:45:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 20:45:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:45:01,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490989465] [2022-11-18 20:45:01,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490989465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62282351] [2022-11-18 20:45:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:01,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:01,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:01,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:45:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:01,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:45:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:45:02,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:45:02,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62282351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:02,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:45:02,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-18 20:45:02,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565353632] [2022-11-18 20:45:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:02,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:45:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:45:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:45:02,012 INFO L87 Difference]: Start difference. First operand 8482 states and 11137 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-18 20:45:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:03,261 INFO L93 Difference]: Finished difference Result 16328 states and 21485 transitions. [2022-11-18 20:45:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:45:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 133 [2022-11-18 20:45:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:03,297 INFO L225 Difference]: With dead ends: 16328 [2022-11-18 20:45:03,297 INFO L226 Difference]: Without dead ends: 8490 [2022-11-18 20:45:03,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:45:03,325 INFO L413 NwaCegarLoop]: 1323 mSDtfsCounter, 676 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:03,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 2005 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:45:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8490 states. [2022-11-18 20:45:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8490 to 8482. [2022-11-18 20:45:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 6387 states have (on average 1.2888680131517145) internal successors, (8232), 6491 states have internal predecessors, (8232), 1408 states have call successors, (1408), 669 states have call predecessors, (1408), 686 states have return successors, (1476), 1393 states have call predecessors, (1476), 1407 states have call successors, (1476) [2022-11-18 20:45:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 11116 transitions. [2022-11-18 20:45:04,132 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 11116 transitions. Word has length 133 [2022-11-18 20:45:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:04,132 INFO L495 AbstractCegarLoop]: Abstraction has 8482 states and 11116 transitions. [2022-11-18 20:45:04,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-18 20:45:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 11116 transitions. [2022-11-18 20:45:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-18 20:45:04,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:04,144 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:04,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:04,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:04,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash 295413892, now seen corresponding path program 1 times [2022-11-18 20:45:04,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:04,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248096363] [2022-11-18 20:45:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:04,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:45:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:45:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:45:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:45:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:45:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:45:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:45:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:04,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:45:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:45:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:05,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 20:45:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:45:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248096363] [2022-11-18 20:45:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248096363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:05,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:45:05,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565119896] [2022-11-18 20:45:05,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:05,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:45:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:05,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:45:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:45:05,032 INFO L87 Difference]: Start difference. First operand 8482 states and 11116 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 20:45:09,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:10,173 INFO L93 Difference]: Finished difference Result 17198 states and 22891 transitions. [2022-11-18 20:45:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:45:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 133 [2022-11-18 20:45:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:10,208 INFO L225 Difference]: With dead ends: 17198 [2022-11-18 20:45:10,208 INFO L226 Difference]: Without dead ends: 9360 [2022-11-18 20:45:10,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:45:10,226 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 608 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:10,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 2598 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-18 20:45:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2022-11-18 20:45:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 8524. [2022-11-18 20:45:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8524 states, 6417 states have (on average 1.2875175315568022) internal successors, (8262), 6521 states have internal predecessors, (8262), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2022-11-18 20:45:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8524 states to 8524 states and 11200 transitions. [2022-11-18 20:45:10,796 INFO L78 Accepts]: Start accepts. Automaton has 8524 states and 11200 transitions. Word has length 133 [2022-11-18 20:45:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:10,797 INFO L495 AbstractCegarLoop]: Abstraction has 8524 states and 11200 transitions. [2022-11-18 20:45:10,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 20:45:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 8524 states and 11200 transitions. [2022-11-18 20:45:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-18 20:45:10,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:10,810 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:10,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:45:10,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:10,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1488902701, now seen corresponding path program 1 times [2022-11-18 20:45:10,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:10,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766492191] [2022-11-18 20:45:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:10,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:45:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:45:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:45:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:45:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:45:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:45:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:45:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:45:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:45:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:45:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 20:45:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:45:12,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766492191] [2022-11-18 20:45:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766492191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:12,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:12,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 20:45:12,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825124611] [2022-11-18 20:45:12,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:12,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:45:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:45:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:45:12,790 INFO L87 Difference]: Start difference. First operand 8524 states and 11200 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 20:45:22,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:31,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:36,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:37,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:39,774 INFO L93 Difference]: Finished difference Result 22361 states and 30728 transitions. [2022-11-18 20:45:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:45:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 139 [2022-11-18 20:45:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:39,835 INFO L225 Difference]: With dead ends: 22361 [2022-11-18 20:45:39,835 INFO L226 Difference]: Without dead ends: 14481 [2022-11-18 20:45:39,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:45:39,855 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 3024 mSDsluCounter, 10758 mSDsCounter, 0 mSdLazyCounter, 9244 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3177 SdHoareTripleChecker+Valid, 11966 SdHoareTripleChecker+Invalid, 10294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 9244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:39,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3177 Valid, 11966 Invalid, 10294 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1050 Valid, 9244 Invalid, 0 Unknown, 0 Unchecked, 24.2s Time] [2022-11-18 20:45:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14481 states. [2022-11-18 20:45:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14481 to 8524. [2022-11-18 20:45:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8524 states, 6417 states have (on average 1.287050023375409) internal successors, (8259), 6521 states have internal predecessors, (8259), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2022-11-18 20:45:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8524 states to 8524 states and 11197 transitions. [2022-11-18 20:45:41,124 INFO L78 Accepts]: Start accepts. Automaton has 8524 states and 11197 transitions. Word has length 139 [2022-11-18 20:45:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:41,124 INFO L495 AbstractCegarLoop]: Abstraction has 8524 states and 11197 transitions. [2022-11-18 20:45:41,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 20:45:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 8524 states and 11197 transitions. [2022-11-18 20:45:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-18 20:45:41,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:41,141 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:41,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:45:41,141 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash 10389512, now seen corresponding path program 1 times [2022-11-18 20:45:41,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:41,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310874292] [2022-11-18 20:45:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:41,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:45:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:45:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:45:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:45:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:45:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:45:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-18 20:45:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:45:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:45:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:45:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-18 20:45:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:45:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:45:41,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:41,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310874292] [2022-11-18 20:45:41,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310874292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:41,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:41,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 20:45:41,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415253742] [2022-11-18 20:45:41,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:41,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:45:41,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:45:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:45:41,566 INFO L87 Difference]: Start difference. First operand 8524 states and 11197 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:45:45,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:49,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:45:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:57,087 INFO L93 Difference]: Finished difference Result 21044 states and 29223 transitions. [2022-11-18 20:45:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:45:57,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 152 [2022-11-18 20:45:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:57,141 INFO L225 Difference]: With dead ends: 21044 [2022-11-18 20:45:57,141 INFO L226 Difference]: Without dead ends: 13164 [2022-11-18 20:45:57,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:45:57,162 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 1460 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 3118 SdHoareTripleChecker+Invalid, 3281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:57,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 3118 Invalid, 3281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2022-11-18 20:45:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2022-11-18 20:45:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 8536. [2022-11-18 20:45:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8536 states, 6429 states have (on average 1.2865142323845078) internal successors, (8271), 6533 states have internal predecessors, (8271), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2022-11-18 20:45:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8536 states to 8536 states and 11209 transitions. [2022-11-18 20:45:58,626 INFO L78 Accepts]: Start accepts. Automaton has 8536 states and 11209 transitions. Word has length 152 [2022-11-18 20:45:58,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:58,626 INFO L495 AbstractCegarLoop]: Abstraction has 8536 states and 11209 transitions. [2022-11-18 20:45:58,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:45:58,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8536 states and 11209 transitions. [2022-11-18 20:45:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-18 20:45:58,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:58,646 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2022-11-18 20:45:58,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:45:58,646 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2074959600, now seen corresponding path program 1 times [2022-11-18 20:45:58,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:58,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618533711] [2022-11-18 20:45:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:58,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:46:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:46:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:46:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:46:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:46:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:46:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:46:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:46:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-18 20:46:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:46:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:00,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-18 20:46:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:01,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 20:46:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-18 20:46:01,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618533711] [2022-11-18 20:46:01,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618533711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671489187] [2022-11-18 20:46:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:01,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:01,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:01,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:01,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:46:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-18 20:46:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:46:02,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-18 20:46:03,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671489187] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:03,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:03,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [19, 16] total 29 [2022-11-18 20:46:03,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070882786] [2022-11-18 20:46:03,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:46:03,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:46:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:46:03,668 INFO L87 Difference]: Start difference. First operand 8536 states and 11209 transitions. Second operand has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-18 20:46:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:13,765 INFO L93 Difference]: Finished difference Result 20667 states and 27210 transitions. [2022-11-18 20:46:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:46:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 157 [2022-11-18 20:46:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:13,891 INFO L225 Difference]: With dead ends: 20667 [2022-11-18 20:46:13,891 INFO L226 Difference]: Without dead ends: 12222 [2022-11-18 20:46:13,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:46:13,908 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 2417 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2471 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 4178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:13,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2471 Valid, 2860 Invalid, 4178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [627 Valid, 3551 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-18 20:46:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12222 states. [2022-11-18 20:46:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12222 to 12186. [2022-11-18 20:46:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12186 states, 9179 states have (on average 1.2889203616951737) internal successors, (11831), 9328 states have internal predecessors, (11831), 2026 states have call successors, (2026), 951 states have call predecessors, (2026), 980 states have return successors, (2184), 2011 states have call predecessors, (2184), 2025 states have call successors, (2184) [2022-11-18 20:46:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12186 states to 12186 states and 16041 transitions. [2022-11-18 20:46:16,138 INFO L78 Accepts]: Start accepts. Automaton has 12186 states and 16041 transitions. Word has length 157 [2022-11-18 20:46:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:16,138 INFO L495 AbstractCegarLoop]: Abstraction has 12186 states and 16041 transitions. [2022-11-18 20:46:16,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-18 20:46:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 12186 states and 16041 transitions. [2022-11-18 20:46:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 20:46:16,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:16,158 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:16,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:16,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:46:16,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash 23234702, now seen corresponding path program 1 times [2022-11-18 20:46:16,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:16,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948471909] [2022-11-18 20:46:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:16,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:46:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:46:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:46:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:46:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:46:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:46:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:46:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:46:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:46:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:46:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:16,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-18 20:46:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:46:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:46:17,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948471909] [2022-11-18 20:46:17,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948471909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469568558] [2022-11-18 20:46:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:17,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:17,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:17,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:17,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:46:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:46:17,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-18 20:46:17,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:46:17,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469568558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:17,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:46:17,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2022-11-18 20:46:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228608954] [2022-11-18 20:46:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:46:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:46:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:46:17,994 INFO L87 Difference]: Start difference. First operand 12186 states and 16041 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:46:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:20,593 INFO L93 Difference]: Finished difference Result 30043 states and 39592 transitions. [2022-11-18 20:46:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:46:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 162 [2022-11-18 20:46:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:20,646 INFO L225 Difference]: With dead ends: 30043 [2022-11-18 20:46:20,647 INFO L226 Difference]: Without dead ends: 17875 [2022-11-18 20:46:20,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:46:20,677 INFO L413 NwaCegarLoop]: 1315 mSDtfsCounter, 760 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:20,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 2051 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:46:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17875 states. [2022-11-18 20:46:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17875 to 17233. [2022-11-18 20:46:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17233 states, 13040 states have (on average 1.3024539877300614) internal successors, (16984), 13254 states have internal predecessors, (16984), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1418 states have return successors, (3002), 2768 states have call predecessors, (3002), 2773 states have call successors, (3002) [2022-11-18 20:46:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17233 states to 17233 states and 22760 transitions. [2022-11-18 20:46:23,732 INFO L78 Accepts]: Start accepts. Automaton has 17233 states and 22760 transitions. Word has length 162 [2022-11-18 20:46:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:23,733 INFO L495 AbstractCegarLoop]: Abstraction has 17233 states and 22760 transitions. [2022-11-18 20:46:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:46:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 17233 states and 22760 transitions. [2022-11-18 20:46:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-18 20:46:23,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:23,752 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:23,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:23,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:46:23,961 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:23,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1976683420, now seen corresponding path program 1 times [2022-11-18 20:46:23,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:23,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738823749] [2022-11-18 20:46:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:23,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:46:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:46:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:46:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:46:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:46:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:46:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:46:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:46:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:46:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:46:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-18 20:46:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-18 20:46:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:46:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-18 20:46:24,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738823749] [2022-11-18 20:46:24,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738823749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:24,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:46:24,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 20:46:24,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147704144] [2022-11-18 20:46:24,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:24,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:46:24,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:46:24,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:46:24,440 INFO L87 Difference]: Start difference. First operand 17233 states and 22760 transitions. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (16), 7 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-18 20:46:29,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:46:39,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:46:40,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:46:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:45,978 INFO L93 Difference]: Finished difference Result 54855 states and 76393 transitions. [2022-11-18 20:46:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:46:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (16), 7 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 182 [2022-11-18 20:46:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:46,089 INFO L225 Difference]: With dead ends: 54855 [2022-11-18 20:46:46,089 INFO L226 Difference]: Without dead ends: 37640 [2022-11-18 20:46:46,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:46:46,133 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 2089 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 4070 mSolverCounterSat, 1337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 3829 SdHoareTripleChecker+Invalid, 5407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1337 IncrementalHoareTripleChecker+Valid, 4070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:46,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2154 Valid, 3829 Invalid, 5407 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1337 Valid, 4070 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2022-11-18 20:46:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37640 states. [2022-11-18 20:46:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37640 to 17291. [2022-11-18 20:46:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17291 states, 13098 states have (on average 1.30111467399603) internal successors, (17042), 13312 states have internal predecessors, (17042), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1418 states have return successors, (3002), 2768 states have call predecessors, (3002), 2773 states have call successors, (3002) [2022-11-18 20:46:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17291 states to 17291 states and 22818 transitions. [2022-11-18 20:46:49,120 INFO L78 Accepts]: Start accepts. Automaton has 17291 states and 22818 transitions. Word has length 182 [2022-11-18 20:46:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:49,121 INFO L495 AbstractCegarLoop]: Abstraction has 17291 states and 22818 transitions. [2022-11-18 20:46:49,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (16), 7 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-18 20:46:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 17291 states and 22818 transitions. [2022-11-18 20:46:49,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-18 20:46:49,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:49,140 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:49,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 20:46:49,141 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1175836332, now seen corresponding path program 1 times [2022-11-18 20:46:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:49,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045594607] [2022-11-18 20:46:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:46:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:46:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:46:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:46:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:46:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:46:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:46:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:46:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:46:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-18 20:46:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:46:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-18 20:46:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 20:46:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-18 20:46:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:49,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 20:46:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:46:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:50,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-18 20:46:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-18 20:46:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-18 20:46:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045594607] [2022-11-18 20:46:50,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045594607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:50,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:46:50,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 20:46:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538208238] [2022-11-18 20:46:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:46:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:46:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:46:50,160 INFO L87 Difference]: Start difference. First operand 17291 states and 22818 transitions. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:47:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:21,118 INFO L93 Difference]: Finished difference Result 54265 states and 77076 transitions. [2022-11-18 20:47:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:47:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 190 [2022-11-18 20:47:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:21,215 INFO L225 Difference]: With dead ends: 54265 [2022-11-18 20:47:21,215 INFO L226 Difference]: Without dead ends: 37236 [2022-11-18 20:47:21,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:47:21,244 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1607 mSDsluCounter, 8035 mSDsCounter, 0 mSdLazyCounter, 7302 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 9149 SdHoareTripleChecker+Invalid, 7983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 7302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:21,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1753 Valid, 9149 Invalid, 7983 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [681 Valid, 7302 Invalid, 0 Unknown, 0 Unchecked, 24.2s Time] [2022-11-18 20:47:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37236 states. [2022-11-18 20:47:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37236 to 17381. [2022-11-18 20:47:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17381 states, 13173 states have (on average 1.2994002884688378) internal successors, (17117), 13387 states have internal predecessors, (17117), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1433 states have return successors, (3032), 2783 states have call predecessors, (3032), 2773 states have call successors, (3032) [2022-11-18 20:47:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17381 states to 17381 states and 22923 transitions. [2022-11-18 20:47:24,454 INFO L78 Accepts]: Start accepts. Automaton has 17381 states and 22923 transitions. Word has length 190 [2022-11-18 20:47:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:24,454 INFO L495 AbstractCegarLoop]: Abstraction has 17381 states and 22923 transitions. [2022-11-18 20:47:24,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:47:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 17381 states and 22923 transitions. [2022-11-18 20:47:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-18 20:47:24,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:24,469 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:24,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 20:47:24,470 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:47:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1178033111, now seen corresponding path program 1 times [2022-11-18 20:47:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:24,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130590449] [2022-11-18 20:47:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:24,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:47:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:47:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:47:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:47:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:47:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:47:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:47:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:47:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:47:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:47:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-18 20:47:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:47:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-18 20:47:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 20:47:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-18 20:47:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 20:47:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:24,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:47:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:25,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-18 20:47:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-11-18 20:47:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-18 20:47:25,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130590449] [2022-11-18 20:47:25,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130590449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825726129] [2022-11-18 20:47:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:25,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:25,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:25,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:25,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:47:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:47:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 20:47:25,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:47:25,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825726129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:47:25,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:47:25,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-18 20:47:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550719135] [2022-11-18 20:47:25,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:47:25,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:47:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:25,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:47:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:47:25,783 INFO L87 Difference]: Start difference. First operand 17381 states and 22923 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:47:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:29,360 INFO L93 Difference]: Finished difference Result 39600 states and 53095 transitions. [2022-11-18 20:47:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:47:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 191 [2022-11-18 20:47:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:29,403 INFO L225 Difference]: With dead ends: 39600 [2022-11-18 20:47:29,403 INFO L226 Difference]: Without dead ends: 22481 [2022-11-18 20:47:29,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:47:29,423 INFO L413 NwaCegarLoop]: 1173 mSDtfsCounter, 222 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:29,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 2075 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:47:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22481 states. [2022-11-18 20:47:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22481 to 17411. [2022-11-18 20:47:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17411 states, 13203 states have (on average 1.298719987881542) internal successors, (17147), 13417 states have internal predecessors, (17147), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1433 states have return successors, (3032), 2783 states have call predecessors, (3032), 2773 states have call successors, (3032) [2022-11-18 20:47:32,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17411 states to 17411 states and 22953 transitions. [2022-11-18 20:47:32,274 INFO L78 Accepts]: Start accepts. Automaton has 17411 states and 22953 transitions. Word has length 191 [2022-11-18 20:47:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:32,275 INFO L495 AbstractCegarLoop]: Abstraction has 17411 states and 22953 transitions. [2022-11-18 20:47:32,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:47:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 17411 states and 22953 transitions. [2022-11-18 20:47:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-18 20:47:32,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:32,287 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:32,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:32,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:32,498 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:47:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1096572583, now seen corresponding path program 1 times [2022-11-18 20:47:32,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:32,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383641941] [2022-11-18 20:47:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:32,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:47:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:47:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:47:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:47:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:47:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:47:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:47:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:47:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:47:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:47:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:47:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:47:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-18 20:47:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-18 20:47:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-18 20:47:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:47:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-18 20:47:32,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:32,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383641941] [2022-11-18 20:47:32,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383641941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:47:32,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:47:32,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 20:47:32,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46694775] [2022-11-18 20:47:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:47:32,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:47:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:47:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:47:32,939 INFO L87 Difference]: Start difference. First operand 17411 states and 22953 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-18 20:47:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:49,233 INFO L93 Difference]: Finished difference Result 55312 states and 76889 transitions. [2022-11-18 20:47:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:47:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 190 [2022-11-18 20:47:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:49,337 INFO L225 Difference]: With dead ends: 55312 [2022-11-18 20:47:49,337 INFO L226 Difference]: Without dead ends: 37919 [2022-11-18 20:47:49,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:47:49,370 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 2313 mSDsluCounter, 2462 mSDsCounter, 0 mSdLazyCounter, 3767 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 5283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 3767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:49,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 3417 Invalid, 5283 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1516 Valid, 3767 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-18 20:47:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37919 states. [2022-11-18 20:47:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37919 to 17411. [2022-11-18 20:47:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17411 states, 13203 states have (on average 1.298719987881542) internal successors, (17147), 13417 states have internal predecessors, (17147), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1433 states have return successors, (3032), 2783 states have call predecessors, (3032), 2773 states have call successors, (3032) [2022-11-18 20:47:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17411 states to 17411 states and 22953 transitions. [2022-11-18 20:47:52,889 INFO L78 Accepts]: Start accepts. Automaton has 17411 states and 22953 transitions. Word has length 190 [2022-11-18 20:47:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:52,890 INFO L495 AbstractCegarLoop]: Abstraction has 17411 states and 22953 transitions. [2022-11-18 20:47:52,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-18 20:47:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17411 states and 22953 transitions. [2022-11-18 20:47:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-18 20:47:52,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:52,897 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:52,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 20:47:52,898 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:47:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:52,898 INFO L85 PathProgramCache]: Analyzing trace with hash -488337116, now seen corresponding path program 1 times [2022-11-18 20:47:52,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:52,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745773257] [2022-11-18 20:47:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:52,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:47:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:47:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:47:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:47:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:47:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:47:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:47:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:47:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:47:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:47:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-18 20:47:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:47:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-18 20:47:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 20:47:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-18 20:47:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 20:47:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:47:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-18 20:47:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-18 20:47:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-18 20:47:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-11-18 20:47:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:47:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745773257] [2022-11-18 20:47:53,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745773257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:47:53,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:47:53,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 20:47:53,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756559818] [2022-11-18 20:47:53,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:47:53,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:47:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:47:53,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:47:53,861 INFO L87 Difference]: Start difference. First operand 17411 states and 22953 transitions. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-18 20:48:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:07,258 INFO L93 Difference]: Finished difference Result 43930 states and 61140 transitions. [2022-11-18 20:48:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:48:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 199 [2022-11-18 20:48:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:07,330 INFO L225 Difference]: With dead ends: 43930 [2022-11-18 20:48:07,330 INFO L226 Difference]: Without dead ends: 26781 [2022-11-18 20:48:07,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:48:07,360 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 1475 mSDsluCounter, 4225 mSDsCounter, 0 mSdLazyCounter, 4987 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 4954 SdHoareTripleChecker+Invalid, 5812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 4987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:07,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 4954 Invalid, 5812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [825 Valid, 4987 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-18 20:48:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26781 states. [2022-11-18 20:48:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26781 to 17486. [2022-11-18 20:48:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17486 states, 13263 states have (on average 1.297368619467692) internal successors, (17207), 13462 states have internal predecessors, (17207), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1448 states have return successors, (3047), 2813 states have call predecessors, (3047), 2773 states have call successors, (3047) [2022-11-18 20:48:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17486 states to 17486 states and 23028 transitions. [2022-11-18 20:48:10,645 INFO L78 Accepts]: Start accepts. Automaton has 17486 states and 23028 transitions. Word has length 199 [2022-11-18 20:48:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:10,646 INFO L495 AbstractCegarLoop]: Abstraction has 17486 states and 23028 transitions. [2022-11-18 20:48:10,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-18 20:48:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 17486 states and 23028 transitions. [2022-11-18 20:48:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-18 20:48:10,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:10,654 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 20:48:10,654 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:48:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1300699659, now seen corresponding path program 1 times [2022-11-18 20:48:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:10,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258396060] [2022-11-18 20:48:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:10,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:48:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:48:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:48:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:48:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:48:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:48:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:48:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:48:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:48:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:48:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:12,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-18 20:48:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:48:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:48:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-18 20:48:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 20:48:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-18 20:48:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:48:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:48:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-18 20:48:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-11-18 20:48:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-11-18 20:48:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-18 20:48:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:48:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258396060] [2022-11-18 20:48:13,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258396060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019333866] [2022-11-18 20:48:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:13,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:13,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:13,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:48:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:15,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:48:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-18 20:48:15,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:48:15,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019333866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:48:15,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:48:15,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 28 [2022-11-18 20:48:15,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392690106] [2022-11-18 20:48:15,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:48:15,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:48:15,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:48:15,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:48:15,810 INFO L87 Difference]: Start difference. First operand 17486 states and 23028 transitions. Second operand has 11 states, 10 states have (on average 13.2) internal successors, (132), 9 states have internal predecessors, (132), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-18 20:48:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:37,716 INFO L93 Difference]: Finished difference Result 55206 states and 74515 transitions. [2022-11-18 20:48:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:48:37,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 9 states have internal predecessors, (132), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 205 [2022-11-18 20:48:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:37,849 INFO L225 Difference]: With dead ends: 55206 [2022-11-18 20:48:37,850 INFO L226 Difference]: Without dead ends: 36986 [2022-11-18 20:48:37,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:48:37,897 INFO L413 NwaCegarLoop]: 932 mSDtfsCounter, 2924 mSDsluCounter, 5561 mSDsCounter, 0 mSdLazyCounter, 10764 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3077 SdHoareTripleChecker+Valid, 6493 SdHoareTripleChecker+Invalid, 11905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 10764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:37,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3077 Valid, 6493 Invalid, 11905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1141 Valid, 10764 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-18 20:48:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36986 states. [2022-11-18 20:48:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36986 to 20640. [2022-11-18 20:48:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20640 states, 15684 states have (on average 1.29265493496557) internal successors, (20274), 15897 states have internal predecessors, (20274), 3246 states have call successors, (3246), 1637 states have call predecessors, (3246), 1709 states have return successors, (3532), 3280 states have call predecessors, (3532), 3245 states have call successors, (3532) [2022-11-18 20:48:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20640 states to 20640 states and 27052 transitions. [2022-11-18 20:48:42,066 INFO L78 Accepts]: Start accepts. Automaton has 20640 states and 27052 transitions. Word has length 205 [2022-11-18 20:48:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:42,067 INFO L495 AbstractCegarLoop]: Abstraction has 20640 states and 27052 transitions. [2022-11-18 20:48:42,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 9 states have internal predecessors, (132), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-18 20:48:42,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20640 states and 27052 transitions. [2022-11-18 20:48:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-18 20:48:42,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:42,079 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:42,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:42,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:48:42,294 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:48:42,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1684241477, now seen corresponding path program 1 times [2022-11-18 20:48:42,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:42,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733785283] [2022-11-18 20:48:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:42,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:48:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:48:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:48:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:48:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:48:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:48:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:48:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:48:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:48:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:48:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:48:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:48:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-18 20:48:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-18 20:48:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-18 20:48:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-18 20:48:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-11-18 20:48:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-18 20:48:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-18 20:48:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-11-18 20:48:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-11-18 20:48:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:48:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 20:48:42,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733785283] [2022-11-18 20:48:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733785283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:48:42,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:48:42,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:48:42,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72395322] [2022-11-18 20:48:42,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:48:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:48:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:48:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:48:42,760 INFO L87 Difference]: Start difference. First operand 20640 states and 27052 transitions. Second operand has 10 states, 10 states have (on average 14.1) internal successors, (141), 3 states have internal predecessors, (141), 2 states have call successors, (23), 9 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-18 20:48:46,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:48:50,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:48:58,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:49:01,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:49:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:07,840 INFO L93 Difference]: Finished difference Result 47765 states and 65718 transitions. [2022-11-18 20:49:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:49:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 3 states have internal predecessors, (141), 2 states have call successors, (23), 9 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 232 [2022-11-18 20:49:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:07,945 INFO L225 Difference]: With dead ends: 47765 [2022-11-18 20:49:07,945 INFO L226 Difference]: Without dead ends: 27143 [2022-11-18 20:49:07,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:49:07,992 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 908 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 3855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:07,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 3026 Invalid, 3855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2022-11-18 20:49:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27143 states. [2022-11-18 20:49:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27143 to 20677. [2022-11-18 20:49:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20677 states, 15721 states have (on average 1.2919661599134915) internal successors, (20311), 15934 states have internal predecessors, (20311), 3246 states have call successors, (3246), 1637 states have call predecessors, (3246), 1709 states have return successors, (3532), 3280 states have call predecessors, (3532), 3245 states have call successors, (3532) [2022-11-18 20:49:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20677 states to 20677 states and 27089 transitions. [2022-11-18 20:49:12,469 INFO L78 Accepts]: Start accepts. Automaton has 20677 states and 27089 transitions. Word has length 232 [2022-11-18 20:49:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:12,470 INFO L495 AbstractCegarLoop]: Abstraction has 20677 states and 27089 transitions. [2022-11-18 20:49:12,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 3 states have internal predecessors, (141), 2 states have call successors, (23), 9 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-18 20:49:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 20677 states and 27089 transitions. [2022-11-18 20:49:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-18 20:49:12,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:12,481 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:12,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 20:49:12,481 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:49:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1416624415, now seen corresponding path program 1 times [2022-11-18 20:49:12,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:12,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168744143] [2022-11-18 20:49:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:12,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:49:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:49:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:49:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:49:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:49:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:49:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:49:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:49:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:49:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-18 20:49:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-18 20:49:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-18 20:49:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-18 20:49:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-11-18 20:49:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-18 20:49:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-11-18 20:49:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:12,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-11-18 20:49:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:13,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-11-18 20:49:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:49:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 20:49:13,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:13,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168744143] [2022-11-18 20:49:13,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168744143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:13,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033071206] [2022-11-18 20:49:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:13,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:13,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:49:13,039 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:49:13,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:49:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 2415 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:49:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-18 20:49:14,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:49:14,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033071206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:49:14,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:49:14,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-18 20:49:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300459946] [2022-11-18 20:49:14,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:49:14,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:49:14,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:49:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:49:14,369 INFO L87 Difference]: Start difference. First operand 20677 states and 27089 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 4 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-18 20:49:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:18,726 INFO L93 Difference]: Finished difference Result 38681 states and 50668 transitions. [2022-11-18 20:49:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:49:18,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 4 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 234 [2022-11-18 20:49:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:18,775 INFO L225 Difference]: With dead ends: 38681 [2022-11-18 20:49:18,775 INFO L226 Difference]: Without dead ends: 18086 [2022-11-18 20:49:18,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:49:18,807 INFO L413 NwaCegarLoop]: 1017 mSDtfsCounter, 1429 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:18,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 1232 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:49:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18086 states. [2022-11-18 20:49:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18086 to 18057. [2022-11-18 20:49:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18057 states, 13897 states have (on average 1.2933007123839677) internal successors, (17973), 14064 states have internal predecessors, (17973), 2707 states have call successors, (2707), 1395 states have call predecessors, (2707), 1452 states have return successors, (2926), 2734 states have call predecessors, (2926), 2706 states have call successors, (2926) [2022-11-18 20:49:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18057 states to 18057 states and 23606 transitions. [2022-11-18 20:49:22,351 INFO L78 Accepts]: Start accepts. Automaton has 18057 states and 23606 transitions. Word has length 234 [2022-11-18 20:49:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:22,351 INFO L495 AbstractCegarLoop]: Abstraction has 18057 states and 23606 transitions. [2022-11-18 20:49:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 4 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-18 20:49:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 18057 states and 23606 transitions. [2022-11-18 20:49:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-18 20:49:22,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:22,367 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:22,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:49:22,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:49:22,574 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:49:22,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash -852946903, now seen corresponding path program 1 times [2022-11-18 20:49:22,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:22,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860183578] [2022-11-18 20:49:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:22,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:49:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:49:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:49:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:49:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:49:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:49:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:49:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:49:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:49:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:49:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 20:49:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:49:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:49:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:49:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-18 20:49:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:49:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:49:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-11-18 20:49:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:49:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 20:49:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-11-18 20:49:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-11-18 20:49:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-18 20:49:23,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:23,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860183578] [2022-11-18 20:49:23,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860183578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:49:23,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:49:23,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 20:49:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803375469] [2022-11-18 20:49:23,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:49:23,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:49:23,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:49:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:49:23,417 INFO L87 Difference]: Start difference. First operand 18057 states and 23606 transitions. Second operand has 13 states, 12 states have (on average 12.75) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (28), 7 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-18 20:49:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:37,466 INFO L93 Difference]: Finished difference Result 39473 states and 52912 transitions. [2022-11-18 20:49:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:49:37,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 12.75) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (28), 7 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 249 [2022-11-18 20:49:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:37,520 INFO L225 Difference]: With dead ends: 39473 [2022-11-18 20:49:37,521 INFO L226 Difference]: Without dead ends: 21679 [2022-11-18 20:49:37,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:49:37,553 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 831 mSDsluCounter, 4186 mSDsCounter, 0 mSdLazyCounter, 3570 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 4802 SdHoareTripleChecker+Invalid, 4243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 3570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:37,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 4802 Invalid, 4243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 3570 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-18 20:49:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21679 states. [2022-11-18 20:49:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21679 to 18105. [2022-11-18 20:49:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18105 states, 13929 states have (on average 1.292626893531481) internal successors, (18005), 14096 states have internal predecessors, (18005), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-18 20:49:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18105 states to 18105 states and 23670 transitions. [2022-11-18 20:49:41,119 INFO L78 Accepts]: Start accepts. Automaton has 18105 states and 23670 transitions. Word has length 249 [2022-11-18 20:49:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:41,120 INFO L495 AbstractCegarLoop]: Abstraction has 18105 states and 23670 transitions. [2022-11-18 20:49:41,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 12.75) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (28), 7 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-18 20:49:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 18105 states and 23670 transitions. [2022-11-18 20:49:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-18 20:49:41,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:41,134 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:41,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-18 20:49:41,134 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:49:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1240168155, now seen corresponding path program 1 times [2022-11-18 20:49:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:41,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541339590] [2022-11-18 20:49:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:41,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:49:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:49:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:49:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:49:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:49:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:49:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:49:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:49:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:49:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:49:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 20:49:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:49:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:49:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:49:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-18 20:49:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:49:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:49:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-18 20:49:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:49:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 20:49:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-11-18 20:49:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-11-18 20:49:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:49:41,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:41,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541339590] [2022-11-18 20:49:41,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541339590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:49:41,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:49:41,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:49:41,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029679310] [2022-11-18 20:49:41,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:49:41,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:49:41,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:41,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:49:41,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:49:41,594 INFO L87 Difference]: Start difference. First operand 18105 states and 23670 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (28), 7 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-18 20:49:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:53,441 INFO L93 Difference]: Finished difference Result 39720 states and 53529 transitions. [2022-11-18 20:49:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:49:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (28), 7 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 250 [2022-11-18 20:49:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:53,487 INFO L225 Difference]: With dead ends: 39720 [2022-11-18 20:49:53,487 INFO L226 Difference]: Without dead ends: 21633 [2022-11-18 20:49:53,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:49:53,512 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 651 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:53,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 2249 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-18 20:49:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21633 states. [2022-11-18 20:49:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21633 to 18138. [2022-11-18 20:49:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18138 states, 13962 states have (on average 1.2919352528291075) internal successors, (18038), 14129 states have internal predecessors, (18038), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-18 20:49:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18138 states to 18138 states and 23703 transitions. [2022-11-18 20:49:57,250 INFO L78 Accepts]: Start accepts. Automaton has 18138 states and 23703 transitions. Word has length 250 [2022-11-18 20:49:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:57,251 INFO L495 AbstractCegarLoop]: Abstraction has 18138 states and 23703 transitions. [2022-11-18 20:49:57,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (28), 7 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-18 20:49:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 18138 states and 23703 transitions. [2022-11-18 20:49:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-18 20:49:57,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:57,262 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-18 20:49:57,262 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:49:57,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:57,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1173492887, now seen corresponding path program 1 times [2022-11-18 20:49:57,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:57,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70346451] [2022-11-18 20:49:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:57,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:49:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:49:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:49:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:49:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:49:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:49:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:49:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:49:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:49:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:49:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:49:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 20:49:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:49:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:49:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:49:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-18 20:49:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:49:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:49:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-18 20:49:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:49:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:49:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 20:49:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-18 20:49:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-11-18 20:49:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:49:57,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:57,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70346451] [2022-11-18 20:49:57,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70346451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:57,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492441444] [2022-11-18 20:49:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:57,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:49:57,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:49:57,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:49:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:58,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 2340 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:49:58,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:49:58,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:49:58,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492441444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:49:58,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:49:58,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 11 [2022-11-18 20:49:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507195678] [2022-11-18 20:49:58,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:58,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:49:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:49:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:49:58,878 INFO L87 Difference]: Start difference. First operand 18138 states and 23703 transitions. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 6 states have internal predecessors, (169), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-18 20:50:01,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:08,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:12,731 INFO L93 Difference]: Finished difference Result 39918 states and 53793 transitions. [2022-11-18 20:50:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:50:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 6 states have internal predecessors, (169), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 252 [2022-11-18 20:50:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:12,919 INFO L225 Difference]: With dead ends: 39918 [2022-11-18 20:50:12,919 INFO L226 Difference]: Without dead ends: 21798 [2022-11-18 20:50:12,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:50:12,940 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 492 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:12,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 2161 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-18 20:50:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21798 states. [2022-11-18 20:50:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21798 to 18336. [2022-11-18 20:50:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18336 states, 14160 states have (on average 1.2878531073446329) internal successors, (18236), 14327 states have internal predecessors, (18236), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-18 20:50:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18336 states to 18336 states and 23901 transitions. [2022-11-18 20:50:16,589 INFO L78 Accepts]: Start accepts. Automaton has 18336 states and 23901 transitions. Word has length 252 [2022-11-18 20:50:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:16,590 INFO L495 AbstractCegarLoop]: Abstraction has 18336 states and 23901 transitions. [2022-11-18 20:50:16,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 6 states have internal predecessors, (169), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-18 20:50:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 18336 states and 23901 transitions. [2022-11-18 20:50:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-11-18 20:50:16,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:16,610 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:16,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:16,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:50:16,821 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash -41815093, now seen corresponding path program 2 times [2022-11-18 20:50:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:16,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513429188] [2022-11-18 20:50:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:16,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:50:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:50:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:50:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:50:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:50:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:50:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:50:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:50:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:50:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:50:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:50:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:50:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:50:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 20:50:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:50:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:50:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:50:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-18 20:50:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:50:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:50:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:50:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-18 20:50:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:50:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:50:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 20:50:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-11-18 20:50:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-11-18 20:50:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:50:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:17,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513429188] [2022-11-18 20:50:17,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513429188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223947771] [2022-11-18 20:50:17,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:50:17,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:17,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:17,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:17,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:50:18,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:50:18,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2385 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:50:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:50:18,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:50:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223947771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:19,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:19,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2022-11-18 20:50:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088228077] [2022-11-18 20:50:19,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:50:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:50:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:50:19,007 INFO L87 Difference]: Start difference. First operand 18336 states and 23901 transitions. Second operand has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 12 states have internal predecessors, (181), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-18 20:50:30,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:31,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:37,159 INFO L93 Difference]: Finished difference Result 40512 states and 54486 transitions. [2022-11-18 20:50:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:50:37,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 12 states have internal predecessors, (181), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 258 [2022-11-18 20:50:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:37,207 INFO L225 Difference]: With dead ends: 40512 [2022-11-18 20:50:37,207 INFO L226 Difference]: Without dead ends: 22194 [2022-11-18 20:50:37,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:50:37,234 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 511 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:37,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 3418 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-18 20:50:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22194 states. [2022-11-18 20:50:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22194 to 18732. [2022-11-18 20:50:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18732 states, 14556 states have (on average 1.2800219840615554) internal successors, (18632), 14723 states have internal predecessors, (18632), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-18 20:50:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18732 states to 18732 states and 24297 transitions. [2022-11-18 20:50:41,082 INFO L78 Accepts]: Start accepts. Automaton has 18732 states and 24297 transitions. Word has length 258 [2022-11-18 20:50:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:41,082 INFO L495 AbstractCegarLoop]: Abstraction has 18732 states and 24297 transitions. [2022-11-18 20:50:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 12 states have internal predecessors, (181), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-18 20:50:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 18732 states and 24297 transitions. [2022-11-18 20:50:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-18 20:50:41,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:41,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:41,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:41,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:50:41,300 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1373667663, now seen corresponding path program 1 times [2022-11-18 20:50:41,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:41,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735654503] [2022-11-18 20:50:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:41,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:50:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:50:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:50:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:50:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:50:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:50:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:50:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:50:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:50:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:50:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-18 20:50:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:50:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:50:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-18 20:50:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 20:50:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-18 20:50:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:50:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:50:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:41,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-18 20:50:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-11-18 20:50:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:50:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 20:50:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:50:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:50:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:50:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:50:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:50:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:50:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-11-18 20:50:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-18 20:50:42,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735654503] [2022-11-18 20:50:42,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735654503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629020038] [2022-11-18 20:50:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:42,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:42,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:42,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:42,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:50:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:43,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:50:43,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:50:43,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-18 20:50:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629020038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:43,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:43,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 15 [2022-11-18 20:50:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160818904] [2022-11-18 20:50:43,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:43,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:50:43,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:43,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:50:43,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:50:43,467 INFO L87 Difference]: Start difference. First operand 18732 states and 24297 transitions. Second operand has 15 states, 15 states have (on average 16.733333333333334) internal successors, (251), 7 states have internal predecessors, (251), 5 states have call successors, (65), 10 states have call predecessors, (65), 2 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) [2022-11-18 20:51:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:13,620 INFO L93 Difference]: Finished difference Result 67069 states and 96082 transitions. [2022-11-18 20:51:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:51:13,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 16.733333333333334) internal successors, (251), 7 states have internal predecessors, (251), 5 states have call successors, (65), 10 states have call predecessors, (65), 2 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) Word has length 265 [2022-11-18 20:51:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:13,735 INFO L225 Difference]: With dead ends: 67069 [2022-11-18 20:51:13,735 INFO L226 Difference]: Without dead ends: 48619 [2022-11-18 20:51:13,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:51:13,767 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 3251 mSDsluCounter, 3659 mSDsCounter, 0 mSdLazyCounter, 5787 mSolverCounterSat, 1880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3556 SdHoareTripleChecker+Valid, 4515 SdHoareTripleChecker+Invalid, 7667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1880 IncrementalHoareTripleChecker+Valid, 5787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:13,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3556 Valid, 4515 Invalid, 7667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1880 Valid, 5787 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2022-11-18 20:51:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48619 states. [2022-11-18 20:51:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48619 to 19416. [2022-11-18 20:51:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19416 states, 15028 states have (on average 1.273356401384083) internal successors, (19136), 15175 states have internal predecessors, (19136), 2935 states have call successors, (2935), 1395 states have call predecessors, (2935), 1452 states have return successors, (3258), 2982 states have call predecessors, (3258), 2934 states have call successors, (3258) [2022-11-18 20:51:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19416 states to 19416 states and 25329 transitions. [2022-11-18 20:51:18,898 INFO L78 Accepts]: Start accepts. Automaton has 19416 states and 25329 transitions. Word has length 265 [2022-11-18 20:51:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:18,898 INFO L495 AbstractCegarLoop]: Abstraction has 19416 states and 25329 transitions. [2022-11-18 20:51:18,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.733333333333334) internal successors, (251), 7 states have internal predecessors, (251), 5 states have call successors, (65), 10 states have call predecessors, (65), 2 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) [2022-11-18 20:51:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 19416 states and 25329 transitions. [2022-11-18 20:51:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-11-18 20:51:18,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:18,910 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:18,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:19,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:19,111 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:51:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1738441960, now seen corresponding path program 1 times [2022-11-18 20:51:19,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626393873] [2022-11-18 20:51:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:19,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:51:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:51:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:51:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:51:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-18 20:51:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 20:51:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:51:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 20:51:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-18 20:51:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:51:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-18 20:51:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:51:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-18 20:51:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:51:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-11-18 20:51:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-11-18 20:51:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-11-18 20:51:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-11-18 20:51:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-11-18 20:51:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:51:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:51:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:51:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-18 20:51:19,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626393873] [2022-11-18 20:51:19,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626393873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099073357] [2022-11-18 20:51:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:19,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:19,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:19,629 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:19,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:51:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:20,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 2491 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:51:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 20:51:20,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-18 20:51:20,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099073357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:20,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:20,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 14 [2022-11-18 20:51:20,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044168688] [2022-11-18 20:51:20,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:20,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:51:20,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:20,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:51:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:51:20,858 INFO L87 Difference]: Start difference. First operand 19416 states and 25329 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-18 20:51:23,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:51:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:37,053 INFO L93 Difference]: Finished difference Result 44214 states and 60473 transitions. [2022-11-18 20:51:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:51:37,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 258 [2022-11-18 20:51:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:37,108 INFO L225 Difference]: With dead ends: 44214 [2022-11-18 20:51:37,108 INFO L226 Difference]: Without dead ends: 24816 [2022-11-18 20:51:37,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:51:37,132 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 1638 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 1107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1107 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:37,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 2166 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1107 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-18 20:51:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24816 states. [2022-11-18 20:51:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24816 to 19626. [2022-11-18 20:51:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19626 states, 15238 states have (on average 1.269589184932406) internal successors, (19346), 15385 states have internal predecessors, (19346), 2935 states have call successors, (2935), 1395 states have call predecessors, (2935), 1452 states have return successors, (3258), 2982 states have call predecessors, (3258), 2934 states have call successors, (3258) [2022-11-18 20:51:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19626 states to 19626 states and 25539 transitions. [2022-11-18 20:51:41,601 INFO L78 Accepts]: Start accepts. Automaton has 19626 states and 25539 transitions. Word has length 258 [2022-11-18 20:51:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:41,602 INFO L495 AbstractCegarLoop]: Abstraction has 19626 states and 25539 transitions. [2022-11-18 20:51:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-18 20:51:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 19626 states and 25539 transitions. [2022-11-18 20:51:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-18 20:51:41,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:41,621 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:41,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:41,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 20:51:41,824 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:51:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash -796445228, now seen corresponding path program 2 times [2022-11-18 20:51:41,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:41,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983300700] [2022-11-18 20:51:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:51:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:51:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:51:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:51:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-18 20:51:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 20:51:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:51:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 20:51:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-18 20:51:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:51:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-18 20:51:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 20:51:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-18 20:51:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:51:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-11-18 20:51:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-11-18 20:51:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-11-18 20:51:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-11-18 20:51:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-11-18 20:51:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:51:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:51:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:51:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 74 proven. 16 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-18 20:51:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983300700] [2022-11-18 20:51:42,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983300700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667412844] [2022-11-18 20:51:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:51:42,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:42,605 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:51:44,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:51:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:44,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:51:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 96 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 20:51:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 74 proven. 16 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-18 20:51:44,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667412844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:44,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:44,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 20 [2022-11-18 20:51:44,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648310638] [2022-11-18 20:51:44,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:44,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:51:44,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:51:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:51:44,367 INFO L87 Difference]: Start difference. First operand 19626 states and 25539 transitions. Second operand has 20 states, 20 states have (on average 10.7) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-18 20:51:49,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:51:55,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:04,210 INFO L93 Difference]: Finished difference Result 44844 states and 61208 transitions. [2022-11-18 20:52:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:52:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.7) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 264 [2022-11-18 20:52:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:04,275 INFO L225 Difference]: With dead ends: 44844 [2022-11-18 20:52:04,275 INFO L226 Difference]: Without dead ends: 25236 [2022-11-18 20:52:04,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:52:04,305 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1604 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 1095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 4122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1095 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:04,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2857 Invalid, 4122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1095 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-18 20:52:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25236 states. [2022-11-18 20:52:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25236 to 20046. [2022-11-18 20:52:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20046 states, 15658 states have (on average 1.2623579001149572) internal successors, (19766), 15805 states have internal predecessors, (19766), 2935 states have call successors, (2935), 1395 states have call predecessors, (2935), 1452 states have return successors, (3258), 2982 states have call predecessors, (3258), 2934 states have call successors, (3258) [2022-11-18 20:52:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20046 states to 20046 states and 25959 transitions. [2022-11-18 20:52:09,772 INFO L78 Accepts]: Start accepts. Automaton has 20046 states and 25959 transitions. Word has length 264 [2022-11-18 20:52:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:09,773 INFO L495 AbstractCegarLoop]: Abstraction has 20046 states and 25959 transitions. [2022-11-18 20:52:09,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.7) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-18 20:52:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20046 states and 25959 transitions. [2022-11-18 20:52:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-18 20:52:09,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:09,786 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:09,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 20:52:09,987 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:09,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1216957747, now seen corresponding path program 3 times [2022-11-18 20:52:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012746683] [2022-11-18 20:52:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:52:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:52:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:52:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:52:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:52:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:52:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:52:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:52:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:52:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:52:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:52:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:52:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:52:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 20:52:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:52:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:52:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:52:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-18 20:52:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:52:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:52:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:52:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-18 20:52:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:52:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:52:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 20:52:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-11-18 20:52:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-11-18 20:52:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:52:10,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:10,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012746683] [2022-11-18 20:52:10,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012746683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:10,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634652415] [2022-11-18 20:52:10,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:52:10,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:10,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:10,969 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:10,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:52:12,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:52:12,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:52:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-18 20:52:12,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:52:12,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634652415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:52:12,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:52:12,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2022-11-18 20:52:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213237102] [2022-11-18 20:52:12,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:52:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:52:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:52:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:52:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:52:12,614 INFO L87 Difference]: Start difference. First operand 20046 states and 25959 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-18 20:52:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:17,382 INFO L93 Difference]: Finished difference Result 39972 states and 51828 transitions. [2022-11-18 20:52:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:52:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 270 [2022-11-18 20:52:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:17,424 INFO L225 Difference]: With dead ends: 39972 [2022-11-18 20:52:17,424 INFO L226 Difference]: Without dead ends: 19944 [2022-11-18 20:52:17,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:52:17,451 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 31 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:17,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1670 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:52:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19944 states. [2022-11-18 20:52:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19944 to 19944. [2022-11-18 20:52:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19944 states, 15607 states have (on average 1.2599474594733133) internal successors, (19664), 15754 states have internal predecessors, (19664), 2884 states have call successors, (2884), 1395 states have call predecessors, (2884), 1452 states have return successors, (3207), 2931 states have call predecessors, (3207), 2883 states have call successors, (3207) [2022-11-18 20:52:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19944 states to 19944 states and 25755 transitions. [2022-11-18 20:52:22,567 INFO L78 Accepts]: Start accepts. Automaton has 19944 states and 25755 transitions. Word has length 270 [2022-11-18 20:52:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:22,567 INFO L495 AbstractCegarLoop]: Abstraction has 19944 states and 25755 transitions. [2022-11-18 20:52:22,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-18 20:52:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 19944 states and 25755 transitions. [2022-11-18 20:52:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-18 20:52:22,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:22,579 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:22,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:22,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:22,780 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash 78646003, now seen corresponding path program 1 times [2022-11-18 20:52:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:22,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463201786] [2022-11-18 20:52:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:22,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:52:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:52:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:52:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:52:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:52:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-18 20:52:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:52:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:52:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:52:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:52:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:52:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:52:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 20:52:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 20:52:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:52:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:52:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:52:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-18 20:52:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:52:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:52:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:52:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-18 20:52:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:52:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:52:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-18 20:52:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-11-18 20:52:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-11-18 20:52:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:52:23,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:23,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463201786] [2022-11-18 20:52:23,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463201786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:23,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774868687] [2022-11-18 20:52:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:23,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:23,825 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:23,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cccfcd33-7b20-4189-91ec-84b2f7091eb2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:52:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2475 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:52:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:52:25,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:52:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774868687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:25,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:52:25,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 27 [2022-11-18 20:52:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822506408] [2022-11-18 20:52:25,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:25,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:52:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:52:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:52:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:52:25,387 INFO L87 Difference]: Start difference. First operand 19944 states and 25755 transitions. Second operand has 27 states, 27 states have (on average 7.518518518518518) internal successors, (203), 22 states have internal predecessors, (203), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-18 20:52:34,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []