./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.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_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/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_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/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_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/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 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- 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 20:27:35,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:27:35,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:27:35,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:27:35,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:27:35,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:27:35,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:27:35,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:27:35,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:27:35,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:27:35,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:27:35,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:27:35,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:27:35,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:27:35,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:27:35,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:27:35,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:27:35,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:27:35,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:27:35,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:27:35,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:27:35,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:27:35,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:27:35,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:27:35,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:27:35,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:27:35,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:27:35,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:27:35,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:27:35,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:27:35,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:27:35,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:27:35,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:27:35,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:27:35,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:27:35,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:27:35,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:27:35,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:27:35,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:27:35,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:27:35,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:27:35,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:27:35,633 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:27:35,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:27:35,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:27:35,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:27:35,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:27:35,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:27:35,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:27:35,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:27:35,637 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:27:35,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:27:35,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:27:35,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:27:35,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:27:35,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:27:35,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:27:35,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:27:35,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:27:35,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:27:35,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:27:35,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:27:35,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:27:35,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:27:35,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:27:35,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:27:35,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:27:35,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:27:35,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:27:35,642 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:27:35,642 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:27:35,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:27:35,643 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_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-11-18 20:27:35,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:27:36,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:27:36,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:27:36,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:27:36,031 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:27:36,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-18 20:27:36,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/data/3c656339b/c4de2fc9fef14748bd37965a7613c1a1/FLAG74c64eeb4 [2022-11-18 20:27:37,145 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:27:37,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-18 20:27:37,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/data/3c656339b/c4de2fc9fef14748bd37965a7613c1a1/FLAG74c64eeb4 [2022-11-18 20:27:37,583 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/data/3c656339b/c4de2fc9fef14748bd37965a7613c1a1 [2022-11-18 20:27:37,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:27:37,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:27:37,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:27:37,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:27:37,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:27:37,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:27:37" (1/1) ... [2022-11-18 20:27:37,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cce227b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:37, skipping insertion in model container [2022-11-18 20:27:37,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:27:37" (1/1) ... [2022-11-18 20:27:37,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:27:37,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:27:38,715 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_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-18 20:27:39,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:27:39,362 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:27:39,554 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_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-18 20:27:39,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:27:39,945 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:27:39,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39 WrapperNode [2022-11-18 20:27:39,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:27:39,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:27:39,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:27:39,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:27:39,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,188 INFO L138 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2007 [2022-11-18 20:27:40,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:27:40,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:27:40,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:27:40,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:27:40,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:27:40,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:27:40,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:27:40,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:27:40,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (1/1) ... [2022-11-18 20:27:40,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:27:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:40,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:27:40,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:27:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-11-18 20:27:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-11-18 20:27:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-18 20:27:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-18 20:27:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-18 20:27:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-18 20:27:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-18 20:27:40,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-18 20:27:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:27:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-18 20:27:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-18 20:27:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-18 20:27:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-18 20:27:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-18 20:27:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-18 20:27:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-18 20:27:40,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-18 20:27:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-18 20:27:40,488 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-18 20:27:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-11-18 20:27:40,489 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-11-18 20:27:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-18 20:27:40,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-18 20:27:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-18 20:27:40,489 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-18 20:27:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-11-18 20:27:40,490 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-11-18 20:27:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:27:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-11-18 20:27:40,490 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-11-18 20:27:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-18 20:27:40,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-18 20:27:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-18 20:27:40,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-18 20:27:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-18 20:27:40,492 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-18 20:27:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:27:40,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:27:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-18 20:27:40,493 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-18 20:27:40,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:27:40,493 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-18 20:27:40,493 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-18 20:27:40,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-11-18 20:27:40,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-11-18 20:27:40,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:27:40,494 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-11-18 20:27:40,494 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-11-18 20:27:40,495 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-11-18 20:27:40,495 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-11-18 20:27:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-18 20:27:40,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-18 20:27:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-11-18 20:27:40,497 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-11-18 20:27:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-11-18 20:27:40,497 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-11-18 20:27:40,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:27:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:27:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-18 20:27:40,500 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-18 20:27:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-11-18 20:27:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-11-18 20:27:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-18 20:27:40,502 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-18 20:27:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:27:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-18 20:27:40,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-18 20:27:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-11-18 20:27:40,503 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-11-18 20:27:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-18 20:27:40,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-18 20:27:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:27:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-18 20:27:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-18 20:27:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 20:27:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-18 20:27:40,506 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-18 20:27:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-11-18 20:27:40,506 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-11-18 20:27:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-18 20:27:40,507 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-18 20:27:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-18 20:27:40,507 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-18 20:27:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-18 20:27:40,508 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-18 20:27:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-18 20:27:40,508 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-18 20:27:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-18 20:27:40,508 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-18 20:27:40,509 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-18 20:27:40,509 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-18 20:27:40,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:27:40,510 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-18 20:27:40,510 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-18 20:27:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-11-18 20:27:40,511 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-11-18 20:27:40,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-18 20:27:40,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-18 20:27:40,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-18 20:27:40,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:27:40,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:27:40,514 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-18 20:27:40,514 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-18 20:27:41,182 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:27:41,188 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:27:41,681 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-18 20:27:43,537 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:27:43,553 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:27:43,553 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:27:43,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:27:43 BoogieIcfgContainer [2022-11-18 20:27:43,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:27:43,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:27:43,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:27:43,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:27:43,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:27:37" (1/3) ... [2022-11-18 20:27:43,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f59d863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:27:43, skipping insertion in model container [2022-11-18 20:27:43,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:39" (2/3) ... [2022-11-18 20:27:43,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f59d863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:27:43, skipping insertion in model container [2022-11-18 20:27:43,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:27:43" (3/3) ... [2022-11-18 20:27:43,578 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-18 20:27:43,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:27:43,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:27:43,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:27:43,731 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;@3f3fb041, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:27:43,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:27:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 728 states, 532 states have (on average 1.3740601503759398) internal successors, (731), 548 states have internal predecessors, (731), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-18 20:27:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 20:27:43,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:43,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:43,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash 94820773, now seen corresponding path program 1 times [2022-11-18 20:27:43,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:43,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200581310] [2022-11-18 20:27:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:43,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:27:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:27:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-18 20:27:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 20:27:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:27:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:27:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:27:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:44,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200581310] [2022-11-18 20:27:44,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200581310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:44,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:44,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:27:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552700312] [2022-11-18 20:27:44,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:44,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:27:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:27:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:27:44,771 INFO L87 Difference]: Start difference. First operand has 728 states, 532 states have (on average 1.3740601503759398) internal successors, (731), 548 states have internal predecessors, (731), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:27:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:48,774 INFO L93 Difference]: Finished difference Result 2359 states and 3534 transitions. [2022-11-18 20:27:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:27:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-11-18 20:27:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:48,810 INFO L225 Difference]: With dead ends: 2359 [2022-11-18 20:27:48,810 INFO L226 Difference]: Without dead ends: 1618 [2022-11-18 20:27:48,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:27:48,827 INFO L413 NwaCegarLoop]: 909 mSDtfsCounter, 1477 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:48,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1614 Valid, 2649 Invalid, 1876 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [515 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 20:27:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-11-18 20:27:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1372. [2022-11-18 20:27:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1010 states have (on average 1.3544554455445545) internal successors, (1368), 1028 states have internal predecessors, (1368), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-11-18 20:27:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1925 transitions. [2022-11-18 20:27:49,069 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1925 transitions. Word has length 53 [2022-11-18 20:27:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:49,070 INFO L495 AbstractCegarLoop]: Abstraction has 1372 states and 1925 transitions. [2022-11-18 20:27:49,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:27:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1925 transitions. [2022-11-18 20:27:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 20:27:49,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:49,082 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:49,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:27:49,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash -520235721, now seen corresponding path program 1 times [2022-11-18 20:27:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:49,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992465109] [2022-11-18 20:27:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:49,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:49,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:27:49,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679896560] [2022-11-18 20:27:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:49,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:49,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:49,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:27:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:27:49,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:27:49,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:27:49,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992465109] [2022-11-18 20:27:49,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:27:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679896560] [2022-11-18 20:27:49,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679896560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:49,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:49,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:27:49,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984902455] [2022-11-18 20:27:49,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:49,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:27:49,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:49,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:27:49,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:49,899 INFO L87 Difference]: Start difference. First operand 1372 states and 1925 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:27:50,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:50,088 INFO L93 Difference]: Finished difference Result 2730 states and 3831 transitions. [2022-11-18 20:27:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:27:50,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-11-18 20:27:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:50,100 INFO L225 Difference]: With dead ends: 2730 [2022-11-18 20:27:50,100 INFO L226 Difference]: Without dead ends: 1372 [2022-11-18 20:27:50,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:50,107 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 974 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:50,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 995 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:27:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-11-18 20:27:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1372. [2022-11-18 20:27:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1010 states have (on average 1.3534653465346536) internal successors, (1367), 1028 states have internal predecessors, (1367), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-11-18 20:27:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1924 transitions. [2022-11-18 20:27:50,220 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1924 transitions. Word has length 55 [2022-11-18 20:27:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:50,221 INFO L495 AbstractCegarLoop]: Abstraction has 1372 states and 1924 transitions. [2022-11-18 20:27:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:27:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1924 transitions. [2022-11-18 20:27:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 20:27:50,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:50,225 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:50,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:50,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-18 20:27:50,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1531352971, now seen corresponding path program 1 times [2022-11-18 20:27:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:50,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744233606] [2022-11-18 20:27:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:50,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:27:50,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272409534] [2022-11-18 20:27:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:50,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:50,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:50,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:50,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:27:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:27:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:27:51,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:27:51,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:51,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744233606] [2022-11-18 20:27:51,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:27:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272409534] [2022-11-18 20:27:51,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272409534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:51,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:51,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:27:51,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185707457] [2022-11-18 20:27:51,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:51,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:27:51,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:27:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:27:51,189 INFO L87 Difference]: Start difference. First operand 1372 states and 1924 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:27:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:51,578 INFO L93 Difference]: Finished difference Result 4085 states and 5810 transitions. [2022-11-18 20:27:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:27:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-11-18 20:27:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:51,599 INFO L225 Difference]: With dead ends: 4085 [2022-11-18 20:27:51,600 INFO L226 Difference]: Without dead ends: 2703 [2022-11-18 20:27:51,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:27:51,612 INFO L413 NwaCegarLoop]: 1232 mSDtfsCounter, 978 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 4697 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:51,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 4697 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:27:51,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2022-11-18 20:27:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2695. [2022-11-18 20:27:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 1983 states have (on average 1.3550176500252142) internal successors, (2687), 2019 states have internal predecessors, (2687), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2022-11-18 20:27:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 3836 transitions. [2022-11-18 20:27:51,890 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 3836 transitions. Word has length 55 [2022-11-18 20:27:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:51,891 INFO L495 AbstractCegarLoop]: Abstraction has 2695 states and 3836 transitions. [2022-11-18 20:27:51,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:27:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 3836 transitions. [2022-11-18 20:27:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 20:27:51,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:51,899 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-18 20:27:51,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:52,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:52,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1177753049, now seen corresponding path program 1 times [2022-11-18 20:27:52,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:52,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772427864] [2022-11-18 20:27:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:52,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:52,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:52,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772427864] [2022-11-18 20:27:52,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:27:52,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086278820] [2022-11-18 20:27:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:52,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:52,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:52,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:52,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:27:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:27:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:27:52,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:27:52,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086278820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:52,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:52,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:27:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6828363] [2022-11-18 20:27:52,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:52,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:27:52,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:27:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:52,792 INFO L87 Difference]: Start difference. First operand 2695 states and 3836 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 20:27:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:53,296 INFO L93 Difference]: Finished difference Result 7655 states and 10865 transitions. [2022-11-18 20:27:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:27:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 89 [2022-11-18 20:27:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:53,329 INFO L225 Difference]: With dead ends: 7655 [2022-11-18 20:27:53,329 INFO L226 Difference]: Without dead ends: 4974 [2022-11-18 20:27:53,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:53,342 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 830 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:53,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 2073 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:27:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4974 states. [2022-11-18 20:27:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4974 to 4965. [2022-11-18 20:27:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 3706 states have (on average 1.3559093362115489) internal successors, (5025), 3767 states have internal predecessors, (5025), 946 states have call successors, (946), 313 states have call predecessors, (946), 312 states have return successors, (1021), 932 states have call predecessors, (1021), 945 states have call successors, (1021) [2022-11-18 20:27:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 6992 transitions. [2022-11-18 20:27:53,728 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 6992 transitions. Word has length 89 [2022-11-18 20:27:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:53,730 INFO L495 AbstractCegarLoop]: Abstraction has 4965 states and 6992 transitions. [2022-11-18 20:27:53,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 20:27:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 6992 transitions. [2022-11-18 20:27:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-18 20:27:53,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:53,740 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-18 20:27:53,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:53,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:53,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1306322781, now seen corresponding path program 1 times [2022-11-18 20:27:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:53,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111975275] [2022-11-18 20:27:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:54,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:54,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111975275] [2022-11-18 20:27:54,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:27:54,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063894727] [2022-11-18 20:27:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:54,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:54,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:54,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:54,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:27:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:27:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:27:54,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:27:54,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063894727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:54,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:54,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:27:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46306832] [2022-11-18 20:27:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:54,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:27:54,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:27:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:54,707 INFO L87 Difference]: Start difference. First operand 4965 states and 6992 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 20:27:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:55,422 INFO L93 Difference]: Finished difference Result 13617 states and 19128 transitions. [2022-11-18 20:27:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:27:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2022-11-18 20:27:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:55,488 INFO L225 Difference]: With dead ends: 13617 [2022-11-18 20:27:55,488 INFO L226 Difference]: Without dead ends: 8666 [2022-11-18 20:27:55,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:55,512 INFO L413 NwaCegarLoop]: 1122 mSDtfsCounter, 779 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:55,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 2065 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:27:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2022-11-18 20:27:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 8637. [2022-11-18 20:27:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8637 states, 6514 states have (on average 1.3533926926619588) internal successors, (8816), 6627 states have internal predecessors, (8816), 1548 states have call successors, (1548), 575 states have call predecessors, (1548), 574 states have return successors, (1683), 1510 states have call predecessors, (1683), 1547 states have call successors, (1683) [2022-11-18 20:27:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8637 states to 8637 states and 12047 transitions. [2022-11-18 20:27:56,285 INFO L78 Accepts]: Start accepts. Automaton has 8637 states and 12047 transitions. Word has length 104 [2022-11-18 20:27:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:56,288 INFO L495 AbstractCegarLoop]: Abstraction has 8637 states and 12047 transitions. [2022-11-18 20:27:56,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-18 20:27:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8637 states and 12047 transitions. [2022-11-18 20:27:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-18 20:27:56,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:56,311 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-11-18 20:27:56,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:56,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:56,521 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash 559024434, now seen corresponding path program 1 times [2022-11-18 20:27:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:56,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059000440] [2022-11-18 20:27:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:56,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:56,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059000440] [2022-11-18 20:27:56,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:27:56,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602742681] [2022-11-18 20:27:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:56,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:56,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:56,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:27:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:27:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-18 20:27:57,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:27:57,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602742681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:57,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:57,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:27:57,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369077948] [2022-11-18 20:27:57,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:57,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:27:57,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:57,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:27:57,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:57,291 INFO L87 Difference]: Start difference. First operand 8637 states and 12047 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:27:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:57,802 INFO L93 Difference]: Finished difference Result 17276 states and 24107 transitions. [2022-11-18 20:27:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:27:57,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-11-18 20:27:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:57,898 INFO L225 Difference]: With dead ends: 17276 [2022-11-18 20:27:57,898 INFO L226 Difference]: Without dead ends: 8653 [2022-11-18 20:27:57,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:57,936 INFO L413 NwaCegarLoop]: 1002 mSDtfsCounter, 0 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:57,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2000 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:27:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8653 states. [2022-11-18 20:27:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8653 to 8653. [2022-11-18 20:27:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8653 states, 6530 states have (on average 1.3525267993874426) internal successors, (8832), 6643 states have internal predecessors, (8832), 1548 states have call successors, (1548), 575 states have call predecessors, (1548), 574 states have return successors, (1683), 1510 states have call predecessors, (1683), 1547 states have call successors, (1683) [2022-11-18 20:27:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8653 states to 8653 states and 12063 transitions. [2022-11-18 20:27:58,576 INFO L78 Accepts]: Start accepts. Automaton has 8653 states and 12063 transitions. Word has length 118 [2022-11-18 20:27:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:58,577 INFO L495 AbstractCegarLoop]: Abstraction has 8653 states and 12063 transitions. [2022-11-18 20:27:58,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:27:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 8653 states and 12063 transitions. [2022-11-18 20:27:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-18 20:27:58,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:58,590 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-11-18 20:27:58,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:58,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:27:58,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash 799264180, now seen corresponding path program 1 times [2022-11-18 20:27:58,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943111312] [2022-11-18 20:27:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:58,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943111312] [2022-11-18 20:27:58,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:27:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672317698] [2022-11-18 20:27:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:58,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:58,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:58,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:58,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:27:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:27:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-18 20:27:59,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:27:59,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672317698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:59,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:59,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:27:59,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185447500] [2022-11-18 20:27:59,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:27:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:27:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:59,663 INFO L87 Difference]: Start difference. First operand 8653 states and 12063 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:28:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:00,548 INFO L93 Difference]: Finished difference Result 22051 states and 30664 transitions. [2022-11-18 20:28:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:28:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-11-18 20:28:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:00,632 INFO L225 Difference]: With dead ends: 22051 [2022-11-18 20:28:00,632 INFO L226 Difference]: Without dead ends: 13412 [2022-11-18 20:28:00,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:00,669 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 681 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:00,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 2308 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:28:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13412 states. [2022-11-18 20:28:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13412 to 13391. [2022-11-18 20:28:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13391 states, 10126 states have (on average 1.3421884258344854) internal successors, (13591), 10300 states have internal predecessors, (13591), 2322 states have call successors, (2322), 943 states have call predecessors, (2322), 942 states have return successors, (2559), 2267 states have call predecessors, (2559), 2321 states have call successors, (2559) [2022-11-18 20:28:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13391 states to 13391 states and 18472 transitions. [2022-11-18 20:28:01,796 INFO L78 Accepts]: Start accepts. Automaton has 13391 states and 18472 transitions. Word has length 118 [2022-11-18 20:28:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:01,797 INFO L495 AbstractCegarLoop]: Abstraction has 13391 states and 18472 transitions. [2022-11-18 20:28:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:28:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 13391 states and 18472 transitions. [2022-11-18 20:28:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 20:28:01,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:01,813 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:01,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-18 20:28:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:02,023 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash -382360909, now seen corresponding path program 1 times [2022-11-18 20:28:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407618723] [2022-11-18 20:28:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:02,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509546910] [2022-11-18 20:28:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:02,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:02,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:02,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:02,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:28:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:02,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:28:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-18 20:28:02,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:02,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:02,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407618723] [2022-11-18 20:28:02,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:02,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509546910] [2022-11-18 20:28:02,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509546910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:02,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:02,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:28:02,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702002150] [2022-11-18 20:28:02,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:02,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:28:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:28:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:02,739 INFO L87 Difference]: Start difference. First operand 13391 states and 18472 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-18 20:28:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:03,996 INFO L93 Difference]: Finished difference Result 34193 states and 47122 transitions. [2022-11-18 20:28:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:28:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 123 [2022-11-18 20:28:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:04,115 INFO L225 Difference]: With dead ends: 34193 [2022-11-18 20:28:04,115 INFO L226 Difference]: Without dead ends: 20827 [2022-11-18 20:28:04,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:04,161 INFO L413 NwaCegarLoop]: 1140 mSDtfsCounter, 944 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:04,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 2064 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:28:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20827 states. [2022-11-18 20:28:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20827 to 20814. [2022-11-18 20:28:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20814 states, 15694 states have (on average 1.3384095832802345) internal successors, (21005), 15981 states have internal predecessors, (21005), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1508 states have return successors, (3956), 3523 states have call predecessors, (3956), 3610 states have call successors, (3956) [2022-11-18 20:28:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20814 states to 20814 states and 28572 transitions. [2022-11-18 20:28:05,956 INFO L78 Accepts]: Start accepts. Automaton has 20814 states and 28572 transitions. Word has length 123 [2022-11-18 20:28:05,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:05,958 INFO L495 AbstractCegarLoop]: Abstraction has 20814 states and 28572 transitions. [2022-11-18 20:28:05,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-18 20:28:05,959 INFO L276 IsEmpty]: Start isEmpty. Operand 20814 states and 28572 transitions. [2022-11-18 20:28:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 20:28:05,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:05,975 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:05,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:28:06,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:06,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash -272803969, now seen corresponding path program 1 times [2022-11-18 20:28:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:06,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616017478] [2022-11-18 20:28:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:06,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053331158] [2022-11-18 20:28:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:06,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:06,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:06,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:28:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:28:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-18 20:28:06,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616017478] [2022-11-18 20:28:06,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053331158] [2022-11-18 20:28:06,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053331158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:06,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:06,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:28:06,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367633041] [2022-11-18 20:28:06,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:06,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:28:06,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:28:06,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:06,849 INFO L87 Difference]: Start difference. First operand 20814 states and 28572 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:28:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:07,991 INFO L93 Difference]: Finished difference Result 31470 states and 43627 transitions. [2022-11-18 20:28:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:28:07,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2022-11-18 20:28:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:08,114 INFO L225 Difference]: With dead ends: 31470 [2022-11-18 20:28:08,114 INFO L226 Difference]: Without dead ends: 20902 [2022-11-18 20:28:08,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:08,156 INFO L413 NwaCegarLoop]: 1002 mSDtfsCounter, 5 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:08,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1996 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:28:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20902 states. [2022-11-18 20:28:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20902 to 20902. [2022-11-18 20:28:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20902 states, 15760 states have (on average 1.336992385786802) internal successors, (21071), 16069 states have internal predecessors, (21071), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1530 states have return successors, (3998), 3523 states have call predecessors, (3998), 3610 states have call successors, (3998) [2022-11-18 20:28:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20902 states to 20902 states and 28680 transitions. [2022-11-18 20:28:09,682 INFO L78 Accepts]: Start accepts. Automaton has 20902 states and 28680 transitions. Word has length 123 [2022-11-18 20:28:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:09,682 INFO L495 AbstractCegarLoop]: Abstraction has 20902 states and 28680 transitions. [2022-11-18 20:28:09,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:28:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 20902 states and 28680 transitions. [2022-11-18 20:28:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-18 20:28:09,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:09,700 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:09,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:09,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:28:09,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1940341376, now seen corresponding path program 1 times [2022-11-18 20:28:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:09,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239872504] [2022-11-18 20:28:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:09,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:09,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220592323] [2022-11-18 20:28:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:09,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:09,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:09,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:28:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:28:10,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 20:28:10,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:10,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:10,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239872504] [2022-11-18 20:28:10,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:10,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220592323] [2022-11-18 20:28:10,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220592323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:10,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:10,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:28:10,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246283275] [2022-11-18 20:28:10,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:10,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:28:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:28:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:28:10,591 INFO L87 Difference]: Start difference. First operand 20902 states and 28680 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:28:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:11,930 INFO L93 Difference]: Finished difference Result 41857 states and 57443 transitions. [2022-11-18 20:28:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:28:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 125 [2022-11-18 20:28:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:12,052 INFO L225 Difference]: With dead ends: 41857 [2022-11-18 20:28:12,052 INFO L226 Difference]: Without dead ends: 20944 [2022-11-18 20:28:12,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 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 20:28:12,120 INFO L413 NwaCegarLoop]: 1005 mSDtfsCounter, 12 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3003 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:12,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3003 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:28:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20944 states. [2022-11-18 20:28:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20944 to 20905. [2022-11-18 20:28:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20905 states, 15763 states have (on average 1.3361669732918862) internal successors, (21062), 16072 states have internal predecessors, (21062), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1530 states have return successors, (3998), 3523 states have call predecessors, (3998), 3610 states have call successors, (3998) [2022-11-18 20:28:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20905 states to 20905 states and 28671 transitions. [2022-11-18 20:28:13,527 INFO L78 Accepts]: Start accepts. Automaton has 20905 states and 28671 transitions. Word has length 125 [2022-11-18 20:28:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:13,527 INFO L495 AbstractCegarLoop]: Abstraction has 20905 states and 28671 transitions. [2022-11-18 20:28:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-18 20:28:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20905 states and 28671 transitions. [2022-11-18 20:28:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-18 20:28:13,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:13,543 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:13,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 20:28:13,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:13,753 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash -755194514, now seen corresponding path program 1 times [2022-11-18 20:28:13,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:13,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766788325] [2022-11-18 20:28:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:13,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:13,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:13,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649956430] [2022-11-18 20:28:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:13,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:13,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:13,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:13,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:28:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:28:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 20:28:14,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:14,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:14,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766788325] [2022-11-18 20:28:14,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:14,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649956430] [2022-11-18 20:28:14,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649956430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:14,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:14,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:28:14,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178881779] [2022-11-18 20:28:14,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:14,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:28:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:28:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:28:14,604 INFO L87 Difference]: Start difference. First operand 20905 states and 28671 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 20:28:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:19,531 INFO L93 Difference]: Finished difference Result 43005 states and 59410 transitions. [2022-11-18 20:28:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:28:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 126 [2022-11-18 20:28:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:19,637 INFO L225 Difference]: With dead ends: 43005 [2022-11-18 20:28:19,638 INFO L226 Difference]: Without dead ends: 22125 [2022-11-18 20:28:19,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:28:19,686 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 1308 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 3015 SdHoareTripleChecker+Invalid, 2948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:19,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 3015 Invalid, 2948 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [485 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 20:28:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22125 states. [2022-11-18 20:28:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22125 to 21267. [2022-11-18 20:28:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21267 states, 15979 states have (on average 1.3294949621378058) internal successors, (21244), 16286 states have internal predecessors, (21244), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-18 20:28:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21267 states to 21267 states and 28897 transitions. [2022-11-18 20:28:21,112 INFO L78 Accepts]: Start accepts. Automaton has 21267 states and 28897 transitions. Word has length 126 [2022-11-18 20:28:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:21,112 INFO L495 AbstractCegarLoop]: Abstraction has 21267 states and 28897 transitions. [2022-11-18 20:28:21,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 20:28:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 21267 states and 28897 transitions. [2022-11-18 20:28:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-18 20:28:21,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:21,129 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:21,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:21,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:28:21,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash -350658489, now seen corresponding path program 1 times [2022-11-18 20:28:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:21,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612849922] [2022-11-18 20:28:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:21,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:21,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719138228] [2022-11-18 20:28:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:21,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:21,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:21,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:28:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:22,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:28:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:22,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:22,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:22,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612849922] [2022-11-18 20:28:22,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:22,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719138228] [2022-11-18 20:28:22,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719138228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:22,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:22,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:28:22,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758661959] [2022-11-18 20:28:22,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:22,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:28:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:28:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:28:22,254 INFO L87 Difference]: Start difference. First operand 21267 states and 28897 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 20:28:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:24,102 INFO L93 Difference]: Finished difference Result 21484 states and 29191 transitions. [2022-11-18 20:28:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:28:24,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 133 [2022-11-18 20:28:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:24,218 INFO L225 Difference]: With dead ends: 21484 [2022-11-18 20:28:24,218 INFO L226 Difference]: Without dead ends: 21435 [2022-11-18 20:28:24,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:28:24,233 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 947 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:24,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1691 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:28:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21435 states. [2022-11-18 20:28:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21435 to 21279. [2022-11-18 20:28:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21279 states, 15991 states have (on average 1.3292477018322806) internal successors, (21256), 16298 states have internal predecessors, (21256), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-18 20:28:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21279 states to 21279 states and 28909 transitions. [2022-11-18 20:28:25,696 INFO L78 Accepts]: Start accepts. Automaton has 21279 states and 28909 transitions. Word has length 133 [2022-11-18 20:28:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:25,697 INFO L495 AbstractCegarLoop]: Abstraction has 21279 states and 28909 transitions. [2022-11-18 20:28:25,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 20:28:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 21279 states and 28909 transitions. [2022-11-18 20:28:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-18 20:28:25,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:25,726 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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] [2022-11-18 20:28:25,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:25,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:25,935 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2087140266, now seen corresponding path program 1 times [2022-11-18 20:28:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:25,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810821128] [2022-11-18 20:28:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:25,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:25,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437341748] [2022-11-18 20:28:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:25,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:25,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:25,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:26,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:28:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:26,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:28:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-18 20:28:26,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:26,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:26,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810821128] [2022-11-18 20:28:26,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:26,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437341748] [2022-11-18 20:28:26,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437341748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:26,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:26,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:28:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199290965] [2022-11-18 20:28:26,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:26,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:28:26,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:28:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:26,707 INFO L87 Difference]: Start difference. First operand 21279 states and 28909 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-18 20:28:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:27,449 INFO L93 Difference]: Finished difference Result 31944 states and 43424 transitions. [2022-11-18 20:28:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:28:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 137 [2022-11-18 20:28:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:27,481 INFO L225 Difference]: With dead ends: 31944 [2022-11-18 20:28:27,481 INFO L226 Difference]: Without dead ends: 10309 [2022-11-18 20:28:27,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:27,525 INFO L413 NwaCegarLoop]: 1121 mSDtfsCounter, 899 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:27,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 1279 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:28:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10309 states. [2022-11-18 20:28:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10309 to 10309. [2022-11-18 20:28:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 7724 states have (on average 1.3256084930088037) internal successors, (10239), 7880 states have internal predecessors, (10239), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2022-11-18 20:28:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 13982 transitions. [2022-11-18 20:28:28,287 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 13982 transitions. Word has length 137 [2022-11-18 20:28:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:28,288 INFO L495 AbstractCegarLoop]: Abstraction has 10309 states and 13982 transitions. [2022-11-18 20:28:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-18 20:28:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 13982 transitions. [2022-11-18 20:28:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 20:28:28,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:28,302 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:28,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:28,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:28,512 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1573998102, now seen corresponding path program 1 times [2022-11-18 20:28:28,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:28,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521095647] [2022-11-18 20:28:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:28,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:28,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:28,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671742616] [2022-11-18 20:28:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:28,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:28,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:28,563 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:28,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:28:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:28:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:29,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:29,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521095647] [2022-11-18 20:28:29,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671742616] [2022-11-18 20:28:29,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671742616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:29,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:29,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-18 20:28:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015120029] [2022-11-18 20:28:29,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:28:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:28:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:28:29,666 INFO L87 Difference]: Start difference. First operand 10309 states and 13982 transitions. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-18 20:28:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:31,277 INFO L93 Difference]: Finished difference Result 10862 states and 14768 transitions. [2022-11-18 20:28:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:28:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 134 [2022-11-18 20:28:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:31,307 INFO L225 Difference]: With dead ends: 10862 [2022-11-18 20:28:31,308 INFO L226 Difference]: Without dead ends: 10813 [2022-11-18 20:28:31,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:28:31,314 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 1037 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:31,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 3080 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:28:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10813 states. [2022-11-18 20:28:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10813 to 10813. [2022-11-18 20:28:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 8102 states have (on average 1.319303875586275) internal successors, (10689), 8276 states have internal predecessors, (10689), 1938 states have call successors, (1938), 737 states have call predecessors, (1938), 772 states have return successors, (2057), 1896 states have call predecessors, (2057), 1937 states have call successors, (2057) [2022-11-18 20:28:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 14684 transitions. [2022-11-18 20:28:32,036 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 14684 transitions. Word has length 134 [2022-11-18 20:28:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:32,036 INFO L495 AbstractCegarLoop]: Abstraction has 10813 states and 14684 transitions. [2022-11-18 20:28:32,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-18 20:28:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 14684 transitions. [2022-11-18 20:28:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-18 20:28:32,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:32,054 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:32,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-18 20:28:32,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:28:32,262 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:32,262 INFO L85 PathProgramCache]: Analyzing trace with hash 554637123, now seen corresponding path program 1 times [2022-11-18 20:28:32,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:32,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913442298] [2022-11-18 20:28:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:32,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:32,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:32,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308146938] [2022-11-18 20:28:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:32,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:32,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:32,320 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:32,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:28:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:28:32,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:33,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:33,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:33,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913442298] [2022-11-18 20:28:33,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:33,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308146938] [2022-11-18 20:28:33,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308146938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:33,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:33,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-18 20:28:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88993396] [2022-11-18 20:28:33,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:33,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:28:33,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:28:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:28:33,400 INFO L87 Difference]: Start difference. First operand 10813 states and 14684 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-18 20:28:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:35,355 INFO L93 Difference]: Finished difference Result 11870 states and 16208 transitions. [2022-11-18 20:28:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:28:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 149 [2022-11-18 20:28:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:35,391 INFO L225 Difference]: With dead ends: 11870 [2022-11-18 20:28:35,391 INFO L226 Difference]: Without dead ends: 11821 [2022-11-18 20:28:35,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:28:35,399 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 1882 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:35,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 3853 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 20:28:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11821 states. [2022-11-18 20:28:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11821 to 11821. [2022-11-18 20:28:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11821 states, 8858 states have (on average 1.3083088733348385) internal successors, (11589), 9068 states have internal predecessors, (11589), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 772 states have return successors, (2309), 2112 states have call predecessors, (2309), 2189 states have call successors, (2309) [2022-11-18 20:28:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11821 states to 11821 states and 16088 transitions. [2022-11-18 20:28:36,095 INFO L78 Accepts]: Start accepts. Automaton has 11821 states and 16088 transitions. Word has length 149 [2022-11-18 20:28:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:36,096 INFO L495 AbstractCegarLoop]: Abstraction has 11821 states and 16088 transitions. [2022-11-18 20:28:36,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-18 20:28:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 11821 states and 16088 transitions. [2022-11-18 20:28:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-18 20:28:36,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:36,124 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:36,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 20:28:36,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:28:36,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:36,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2135664481, now seen corresponding path program 2 times [2022-11-18 20:28:36,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:36,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694467405] [2022-11-18 20:28:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:36,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:36,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2813467] [2022-11-18 20:28:36,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:36,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:36,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:36,395 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:36,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:28:36,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:28:36,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:28:36,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-11-18 20:28:36,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:36,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694467405] [2022-11-18 20:28:36,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2813467] [2022-11-18 20:28:36,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2813467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:36,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:36,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:28:36,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942459504] [2022-11-18 20:28:36,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:36,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:28:36,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:28:36,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:28:36,890 INFO L87 Difference]: Start difference. First operand 11821 states and 16088 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 20:28:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:37,420 INFO L93 Difference]: Finished difference Result 23630 states and 32397 transitions. [2022-11-18 20:28:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:28:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 170 [2022-11-18 20:28:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:37,446 INFO L225 Difference]: With dead ends: 23630 [2022-11-18 20:28:37,447 INFO L226 Difference]: Without dead ends: 11943 [2022-11-18 20:28:37,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:28:37,464 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 2 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3977 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:37,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3977 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:28:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11943 states. [2022-11-18 20:28:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11943 to 11901. [2022-11-18 20:28:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11901 states, 8918 states have (on average 1.3062345817447858) internal successors, (11649), 9128 states have internal predecessors, (11649), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 792 states have return successors, (2338), 2132 states have call predecessors, (2338), 2189 states have call successors, (2338) [2022-11-18 20:28:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11901 states to 11901 states and 16177 transitions. [2022-11-18 20:28:38,036 INFO L78 Accepts]: Start accepts. Automaton has 11901 states and 16177 transitions. Word has length 170 [2022-11-18 20:28:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:38,037 INFO L495 AbstractCegarLoop]: Abstraction has 11901 states and 16177 transitions. [2022-11-18 20:28:38,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 20:28:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 11901 states and 16177 transitions. [2022-11-18 20:28:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-18 20:28:38,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:38,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:38,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:38,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:28:38,261 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1917830457, now seen corresponding path program 1 times [2022-11-18 20:28:38,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:38,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800344521] [2022-11-18 20:28:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:38,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:38,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:38,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747832728] [2022-11-18 20:28:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:38,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:38,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:38,312 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:38,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:28:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:38,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1389 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:28:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:39,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:39,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800344521] [2022-11-18 20:28:39,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747832728] [2022-11-18 20:28:39,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747832728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:39,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:39,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-11-18 20:28:39,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010471031] [2022-11-18 20:28:39,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:39,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:28:39,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:39,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:28:39,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:28:39,887 INFO L87 Difference]: Start difference. First operand 11901 states and 16177 transitions. Second operand has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 26 states have internal predecessors, (227), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-18 20:28:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:42,896 INFO L93 Difference]: Finished difference Result 13966 states and 19177 transitions. [2022-11-18 20:28:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:28:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 26 states have internal predecessors, (227), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 177 [2022-11-18 20:28:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:42,953 INFO L225 Difference]: With dead ends: 13966 [2022-11-18 20:28:42,954 INFO L226 Difference]: Without dead ends: 13917 [2022-11-18 20:28:42,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:28:42,965 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 2320 mSDsluCounter, 3759 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 4745 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:42,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2364 Valid, 4745 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-18 20:28:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2022-11-18 20:28:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 13917. [2022-11-18 20:28:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13917 states, 10430 states have (on average 1.2894534995206137) internal successors, (13449), 10712 states have internal predecessors, (13449), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 792 states have return successors, (2842), 2564 states have call predecessors, (2842), 2693 states have call successors, (2842) [2022-11-18 20:28:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13917 states to 13917 states and 18985 transitions. [2022-11-18 20:28:43,663 INFO L78 Accepts]: Start accepts. Automaton has 13917 states and 18985 transitions. Word has length 177 [2022-11-18 20:28:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:43,664 INFO L495 AbstractCegarLoop]: Abstraction has 13917 states and 18985 transitions. [2022-11-18 20:28:43,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 26 states have internal predecessors, (227), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-18 20:28:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 13917 states and 18985 transitions. [2022-11-18 20:28:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-18 20:28:43,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:43,696 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:43,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:43,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:43,906 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1384376787, now seen corresponding path program 2 times [2022-11-18 20:28:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022894010] [2022-11-18 20:28:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:43,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:43,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:43,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878789959] [2022-11-18 20:28:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:43,956 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:43,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:28:44,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:28:44,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:28:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-11-18 20:28:44,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:44,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022894010] [2022-11-18 20:28:44,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878789959] [2022-11-18 20:28:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878789959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:44,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:44,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-18 20:28:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507873665] [2022-11-18 20:28:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:44,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:28:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:28:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:28:44,768 INFO L87 Difference]: Start difference. First operand 13917 states and 18985 transitions. Second operand has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-18 20:28:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:46,255 INFO L93 Difference]: Finished difference Result 27978 states and 38331 transitions. [2022-11-18 20:28:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:28:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 225 [2022-11-18 20:28:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:46,320 INFO L225 Difference]: With dead ends: 27978 [2022-11-18 20:28:46,321 INFO L226 Difference]: Without dead ends: 14195 [2022-11-18 20:28:46,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:28:46,366 INFO L413 NwaCegarLoop]: 1022 mSDtfsCounter, 22 mSDsluCounter, 12168 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13190 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:46,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13190 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:28:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14195 states. [2022-11-18 20:28:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14195 to 14029. [2022-11-18 20:28:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14029 states, 10510 states have (on average 1.2845861084681256) internal successors, (13501), 10792 states have internal predecessors, (13501), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 824 states have return successors, (2898), 2596 states have call predecessors, (2898), 2693 states have call successors, (2898) [2022-11-18 20:28:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14029 states to 14029 states and 19093 transitions. [2022-11-18 20:28:47,517 INFO L78 Accepts]: Start accepts. Automaton has 14029 states and 19093 transitions. Word has length 225 [2022-11-18 20:28:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:47,518 INFO L495 AbstractCegarLoop]: Abstraction has 14029 states and 19093 transitions. [2022-11-18 20:28:47,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-18 20:28:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 14029 states and 19093 transitions. [2022-11-18 20:28:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-18 20:28:47,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:47,577 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:47,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:28:47,791 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:47,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:47,791 INFO L85 PathProgramCache]: Analyzing trace with hash -191597566, now seen corresponding path program 1 times [2022-11-18 20:28:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:47,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069558302] [2022-11-18 20:28:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:47,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:47,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191369511] [2022-11-18 20:28:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:47,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:47,853 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:47,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:28:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:28:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:49,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:28:50,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:50,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069558302] [2022-11-18 20:28:50,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:50,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191369511] [2022-11-18 20:28:50,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191369511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:50,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:28:50,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-11-18 20:28:50,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177011101] [2022-11-18 20:28:50,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:50,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:28:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:28:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 20:28:50,651 INFO L87 Difference]: Start difference. First operand 14029 states and 19093 transitions. Second operand has 50 states, 50 states have (on average 6.66) internal successors, (333), 50 states have internal predecessors, (333), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-18 20:28:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:55,265 INFO L93 Difference]: Finished difference Result 18110 states and 25045 transitions. [2022-11-18 20:28:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 20:28:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.66) internal successors, (333), 50 states have internal predecessors, (333), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 230 [2022-11-18 20:28:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:55,310 INFO L225 Difference]: With dead ends: 18110 [2022-11-18 20:28:55,311 INFO L226 Difference]: Without dead ends: 18061 [2022-11-18 20:28:55,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 20:28:55,322 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 3263 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3355 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:55,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3355 Valid, 3158 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-18 20:28:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18061 states. [2022-11-18 20:28:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18061 to 18061. [2022-11-18 20:28:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18061 states, 13534 states have (on average 1.2635584453967785) internal successors, (17101), 13960 states have internal predecessors, (17101), 3702 states have call successors, (3702), 737 states have call predecessors, (3702), 824 states have return successors, (3906), 3460 states have call predecessors, (3906), 3701 states have call successors, (3906) [2022-11-18 20:28:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18061 states to 18061 states and 24709 transitions. [2022-11-18 20:28:56,573 INFO L78 Accepts]: Start accepts. Automaton has 18061 states and 24709 transitions. Word has length 230 [2022-11-18 20:28:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:56,574 INFO L495 AbstractCegarLoop]: Abstraction has 18061 states and 24709 transitions. [2022-11-18 20:28:56,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.66) internal successors, (333), 50 states have internal predecessors, (333), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-18 20:28:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 18061 states and 24709 transitions. [2022-11-18 20:28:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-18 20:28:56,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:56,649 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:56,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:56,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:56,858 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:28:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1046721002, now seen corresponding path program 2 times [2022-11-18 20:28:56,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:56,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768575836] [2022-11-18 20:28:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:56,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:56,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:28:56,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436291554] [2022-11-18 20:28:56,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:56,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:56,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:56,923 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:56,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8e94e2d-926b-45d3-b0b5-d16fe6f46f49/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:28:57,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:28:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:28:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 4317 trivial. 0 not checked. [2022-11-18 20:28:57,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768575836] [2022-11-18 20:28:57,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:28:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436291554] [2022-11-18 20:28:57,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436291554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:57,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:57,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-18 20:28:57,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111745484] [2022-11-18 20:28:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:28:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:28:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:28:57,733 INFO L87 Difference]: Start difference. First operand 18061 states and 24709 transitions. Second operand has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15)