./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP --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 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:27,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:27,588 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-06 21:53:27,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:27,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:27,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:27,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:27,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:27,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:27,651 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:27,653 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:27,654 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:27,654 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:27,656 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:27,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:27,657 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:27,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:27,658 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:27,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:27,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:27,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:27,660 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:27,660 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:27,661 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:27,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:27,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:27,662 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:27,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:27,663 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:27,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:27,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:27,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:27,665 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:27,666 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:27,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:27,666 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:27,667 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 [2023-11-06 21:53:27,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:28,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:28,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:28,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:28,007 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:28,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2023-11-06 21:53:31,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:31,696 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:31,696 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2023-11-06 21:53:31,756 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/data/09cbe0e26/95f732447ece40c5a9507508c7322d72/FLAG5da5b5bb9 [2023-11-06 21:53:31,777 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/data/09cbe0e26/95f732447ece40c5a9507508c7322d72 [2023-11-06 21:53:31,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:31,785 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:31,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:31,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:31,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:31,796 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:31,797 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73078fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31, skipping insertion in model container [2023-11-06 21:53:31,797 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:31,937 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:32,468 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-06 21:53:32,469 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2023-11-06 21:53:32,804 WARN L240 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_403e1d75-d4b0-4c32-845b-8d9770afb119/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2023-11-06 21:53:33,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:33,781 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:33,935 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-06 21:53:33,936 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2023-11-06 21:53:33,939 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [3625] [2023-11-06 21:53:33,941 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0": "+m" (v->counter)); [3632] [2023-11-06 21:53:33,941 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0; sete %1": "+m" (v->counter), "=qm" (c): : "memory"); [3640-3641] [2023-11-06 21:53:33,972 WARN L240 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_403e1d75-d4b0-4c32-845b-8d9770afb119/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2023-11-06 21:53:33,974 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (65), "i" (12UL)); [3856-3857] [2023-11-06 21:53:33,975 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (67), "i" (12UL)); [3864-3865] [2023-11-06 21:53:33,975 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (68), "i" (12UL)); [3872-3873] [2023-11-06 21:53:33,977 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (98), "i" (12UL)); [3899-3900] [2023-11-06 21:53:33,977 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (99), "i" (12UL)); [3907-3908] [2023-11-06 21:53:33,979 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (115), "i" (12UL)); [3931-3932] [2023-11-06 21:53:34,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:34,304 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:34,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34 WrapperNode [2023-11-06 21:53:34,306 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:34,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:34,307 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:34,308 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:34,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,674 INFO L138 Inliner]: procedures = 189, calls = 1841, calls flagged for inlining = 79, calls inlined = 70, statements flattened = 4898 [2023-11-06 21:53:34,675 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:34,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:34,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:34,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:34,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,921 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,000 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,034 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:35,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:35,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:35,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:35,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:35,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:35,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2023-11-06 21:53:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2023-11-06 21:53:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-06 21:53:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-06 21:53:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-06 21:53:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-06 21:53:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-06 21:53:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-06 21:53:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-06 21:53:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-06 21:53:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure free_sglist [2023-11-06 21:53:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure free_sglist [2023-11-06 21:53:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2023-11-06 21:53:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2023-11-06 21:53:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure test_iso_queue [2023-11-06 21:53:35,121 INFO L138 BoogieDeclarations]: Found implementation of procedure test_iso_queue [2023-11-06 21:53:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure simple_check_buf [2023-11-06 21:53:35,121 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_check_buf [2023-11-06 21:53:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-06 21:53:35,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-06 21:53:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:53:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-06 21:53:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-06 21:53:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure perform_sglist [2023-11-06 21:53:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure perform_sglist [2023-11-06 21:53:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure test_unaligned_bulk [2023-11-06 21:53:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure test_unaligned_bulk [2023-11-06 21:53:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-06 21:53:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-06 21:53:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_sglist [2023-11-06 21:53:35,125 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_sglist [2023-11-06 21:53:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-06 21:53:35,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-06 21:53:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-06 21:53:35,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-06 21:53:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2023-11-06 21:53:35,126 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2023-11-06 21:53:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-06 21:53:35,127 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-06 21:53:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-06 21:53:35,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-06 21:53:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-06 21:53:35,127 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-06 21:53:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure set_altsetting [2023-11-06 21:53:35,128 INFO L138 BoogieDeclarations]: Found implementation of procedure set_altsetting [2023-11-06 21:53:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-06 21:53:35,128 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-06 21:53:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:53:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-06 21:53:35,128 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-06 21:53:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-06 21:53:35,129 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-06 21:53:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-06 21:53:35,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-06 21:53:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure verify_not_halted [2023-11-06 21:53:35,129 INFO L138 BoogieDeclarations]: Found implementation of procedure verify_not_halted [2023-11-06 21:53:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2023-11-06 21:53:35,131 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2023-11-06 21:53:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-06 21:53:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-06 21:53:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-06 21:53:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-06 21:53:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-06 21:53:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-06 21:53:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2023-11-06 21:53:35,133 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2023-11-06 21:53:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:53:35,133 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:53:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure test_halt [2023-11-06 21:53:35,133 INFO L138 BoogieDeclarations]: Found implementation of procedure test_halt [2023-11-06 21:53:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_alloc_urb [2023-11-06 21:53:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_alloc_urb [2023-11-06 21:53:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure unlink1 [2023-11-06 21:53:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink1 [2023-11-06 21:53:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:53:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_out [2023-11-06 21:53:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_out [2023-11-06 21:53:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-06 21:53:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-06 21:53:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-06 21:53:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-06 21:53:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_status [2023-11-06 21:53:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_status [2023-11-06 21:53:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure is_good_config [2023-11-06 21:53:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure is_good_config [2023-11-06 21:53:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2023-11-06 21:53:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2023-11-06 21:53:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-06 21:53:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-06 21:53:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:53:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:53:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2023-11-06 21:53:35,138 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2023-11-06 21:53:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-06 21:53:35,138 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-06 21:53:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-06 21:53:35,138 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-06 21:53:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure testdev_to_usbdev [2023-11-06 21:53:35,138 INFO L138 BoogieDeclarations]: Found implementation of procedure testdev_to_usbdev [2023-11-06 21:53:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-06 21:53:35,139 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-06 21:53:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:53:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_simple [2023-11-06 21:53:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_simple [2023-11-06 21:53:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-06 21:53:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-06 21:53:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2023-11-06 21:53:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2023-11-06 21:53:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-06 21:53:35,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-06 21:53:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-06 21:53:35,142 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-06 21:53:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure simple_io [2023-11-06 21:53:35,142 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_io [2023-11-06 21:53:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:53:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 21:53:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure simple_alloc_urb [2023-11-06 21:53:35,143 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_alloc_urb [2023-11-06 21:53:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure simple_free_urb [2023-11-06 21:53:35,143 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_free_urb [2023-11-06 21:53:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-06 21:53:35,143 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-06 21:53:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure simple_fill_buf [2023-11-06 21:53:35,144 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_fill_buf [2023-11-06 21:53:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure do_gettimeofday [2023-11-06 21:53:35,145 INFO L138 BoogieDeclarations]: Found implementation of procedure do_gettimeofday [2023-11-06 21:53:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-06 21:53:35,145 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-06 21:53:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-06 21:53:35,145 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-06 21:53:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_ioctl [2023-11-06 21:53:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_ioctl [2023-11-06 21:53:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_offset [2023-11-06 21:53:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_offset [2023-11-06 21:53:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-06 21:53:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-06 21:53:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-06 21:53:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-06 21:53:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2023-11-06 21:53:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2023-11-06 21:53:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_disconnect [2023-11-06 21:53:35,152 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_disconnect [2023-11-06 21:53:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure check_guard_bytes [2023-11-06 21:53:35,153 INFO L138 BoogieDeclarations]: Found implementation of procedure check_guard_bytes [2023-11-06 21:53:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-06 21:53:35,153 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-06 21:53:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-06 21:53:35,155 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-06 21:53:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-06 21:53:35,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-06 21:53:35,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:35,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:35,161 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_descriptor [2023-11-06 21:53:35,161 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_descriptor [2023-11-06 21:53:35,822 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:35,828 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:36,563 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-06 21:53:40,152 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:40,172 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:40,173 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 21:53:40,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:40 BoogieIcfgContainer [2023-11-06 21:53:40,178 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:40,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:40,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:40,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:40,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:31" (1/3) ... [2023-11-06 21:53:40,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33968804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:40, skipping insertion in model container [2023-11-06 21:53:40,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (2/3) ... [2023-11-06 21:53:40,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33968804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:40, skipping insertion in model container [2023-11-06 21:53:40,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:40" (3/3) ... [2023-11-06 21:53:40,192 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2023-11-06 21:53:40,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:40,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:40,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:40,332 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;@4d450082, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:40,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:53:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 1558 states, 1139 states have (on average 1.4064969271290606) internal successors, (1602), 1154 states have internal predecessors, (1602), 346 states have call successors, (346), 72 states have call predecessors, (346), 71 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) [2023-11-06 21:53:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 21:53:40,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:40,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:40,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:40,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2014808197, now seen corresponding path program 1 times [2023-11-06 21:53:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:40,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705772038] [2023-11-06 21:53:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:53:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 21:53:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-06 21:53:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:53:41,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:41,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705772038] [2023-11-06 21:53:41,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705772038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:41,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:41,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:53:41,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316307265] [2023-11-06 21:53:41,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:41,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:41,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:41,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:41,217 INFO L87 Difference]: Start difference. First operand has 1558 states, 1139 states have (on average 1.4064969271290606) internal successors, (1602), 1154 states have internal predecessors, (1602), 346 states have call successors, (346), 72 states have call predecessors, (346), 71 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:53:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:48,213 INFO L93 Difference]: Finished difference Result 3509 states and 5332 transitions. [2023-11-06 21:53:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:53:48,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-11-06 21:53:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:48,256 INFO L225 Difference]: With dead ends: 3509 [2023-11-06 21:53:48,257 INFO L226 Difference]: Without dead ends: 1919 [2023-11-06 21:53:48,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:53:48,286 INFO L413 NwaCegarLoop]: 1623 mSDtfsCounter, 1422 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 2785 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 4713 SdHoareTripleChecker+Invalid, 3765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 2785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:48,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 4713 Invalid, 3765 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [980 Valid, 2785 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-11-06 21:53:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2023-11-06 21:53:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1571. [2023-11-06 21:53:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1151 states have (on average 1.3857515204170288) internal successors, (1595), 1162 states have internal predecessors, (1595), 345 states have call successors, (345), 75 states have call predecessors, (345), 74 states have return successors, (344), 340 states have call predecessors, (344), 344 states have call successors, (344) [2023-11-06 21:53:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2284 transitions. [2023-11-06 21:53:48,505 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2284 transitions. Word has length 40 [2023-11-06 21:53:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:48,506 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 2284 transitions. [2023-11-06 21:53:48,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:53:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2284 transitions. [2023-11-06 21:53:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 21:53:48,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:48,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-06 21:53:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:53:48,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:48,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash 442324009, now seen corresponding path program 1 times [2023-11-06 21:53:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:48,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884253653] [2023-11-06 21:53:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:53:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 21:53:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 21:53:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 21:53:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 21:53:48,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:48,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884253653] [2023-11-06 21:53:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884253653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:48,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:53:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667328952] [2023-11-06 21:53:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:48,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:48,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:48,781 INFO L87 Difference]: Start difference. First operand 1571 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 21:53:55,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 21:53:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:55,318 INFO L93 Difference]: Finished difference Result 1918 states and 2867 transitions. [2023-11-06 21:53:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2023-11-06 21:53:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:55,338 INFO L225 Difference]: With dead ends: 1918 [2023-11-06 21:53:55,338 INFO L226 Difference]: Without dead ends: 1915 [2023-11-06 21:53:55,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:53:55,380 INFO L413 NwaCegarLoop]: 1588 mSDtfsCounter, 1302 mSDsluCounter, 3059 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 4647 SdHoareTripleChecker+Invalid, 3713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 969 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:55,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 4647 Invalid, 3713 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [969 Valid, 2744 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-06 21:53:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2023-11-06 21:53:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1572. [2023-11-06 21:53:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1152 states have (on average 1.3854166666666667) internal successors, (1596), 1163 states have internal predecessors, (1596), 345 states have call successors, (345), 75 states have call predecessors, (345), 74 states have return successors, (344), 340 states have call predecessors, (344), 344 states have call successors, (344) [2023-11-06 21:53:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2285 transitions. [2023-11-06 21:53:55,527 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2285 transitions. Word has length 61 [2023-11-06 21:53:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:55,528 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2285 transitions. [2023-11-06 21:53:55,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 21:53:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2285 transitions. [2023-11-06 21:53:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 21:53:55,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:55,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-06 21:53:55,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:53:55,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:55,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash -174651010, now seen corresponding path program 1 times [2023-11-06 21:53:55,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:55,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85317040] [2023-11-06 21:53:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:55,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:53:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-06 21:53:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 21:53:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 21:53:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 21:53:56,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:56,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85317040] [2023-11-06 21:53:56,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85317040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:56,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:56,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:53:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967334017] [2023-11-06 21:53:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:56,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:53:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:53:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:53:56,178 INFO L87 Difference]: Start difference. First operand 1572 states and 2285 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 21:54:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:02,901 INFO L93 Difference]: Finished difference Result 3502 states and 5237 transitions. [2023-11-06 21:54:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2023-11-06 21:54:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:02,920 INFO L225 Difference]: With dead ends: 3502 [2023-11-06 21:54:02,920 INFO L226 Difference]: Without dead ends: 1954 [2023-11-06 21:54:02,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:02,934 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 3359 mSDsluCounter, 3102 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 1582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 4694 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1582 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:02,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 4694 Invalid, 4412 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1582 Valid, 2830 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-06 21:54:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2023-11-06 21:54:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1608. [2023-11-06 21:54:03,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1176 states have (on average 1.3801020408163265) internal successors, (1623), 1187 states have internal predecessors, (1623), 349 states have call successors, (349), 83 states have call predecessors, (349), 82 states have return successors, (348), 344 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-06 21:54:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2320 transitions. [2023-11-06 21:54:03,062 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2320 transitions. Word has length 63 [2023-11-06 21:54:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:03,063 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2320 transitions. [2023-11-06 21:54:03,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 21:54:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2320 transitions. [2023-11-06 21:54:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-06 21:54:03,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:03,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:03,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:54:03,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:03,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1362342119, now seen corresponding path program 1 times [2023-11-06 21:54:03,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:03,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703139659] [2023-11-06 21:54:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:03,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703139659] [2023-11-06 21:54:03,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:03,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309693834] [2023-11-06 21:54:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:03,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:03,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:03,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:03,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:54:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:04,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:54:04,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:54:04,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:04,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309693834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:04,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:04,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:04,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544452923] [2023-11-06 21:54:04,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:04,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:04,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:04,408 INFO L87 Difference]: Start difference. First operand 1608 states and 2320 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-06 21:54:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:04,539 INFO L93 Difference]: Finished difference Result 3193 states and 4617 transitions. [2023-11-06 21:54:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:04,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 169 [2023-11-06 21:54:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:04,554 INFO L225 Difference]: With dead ends: 3193 [2023-11-06 21:54:04,554 INFO L226 Difference]: Without dead ends: 1609 [2023-11-06 21:54:04,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:04,566 INFO L413 NwaCegarLoop]: 2243 mSDtfsCounter, 0 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4480 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:04,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4480 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:54:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2023-11-06 21:54:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2023-11-06 21:54:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1177 states have (on average 1.3797790994052677) internal successors, (1624), 1188 states have internal predecessors, (1624), 349 states have call successors, (349), 83 states have call predecessors, (349), 82 states have return successors, (348), 344 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-06 21:54:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2321 transitions. [2023-11-06 21:54:04,672 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2321 transitions. Word has length 169 [2023-11-06 21:54:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:04,673 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2321 transitions. [2023-11-06 21:54:04,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-06 21:54:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2321 transitions. [2023-11-06 21:54:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-06 21:54:04,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:04,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:04,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:04,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:04,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1416735017, now seen corresponding path program 1 times [2023-11-06 21:54:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:04,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125155103] [2023-11-06 21:54:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:05,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:05,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125155103] [2023-11-06 21:54:05,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:05,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039893001] [2023-11-06 21:54:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:05,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:05,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:54:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:06,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:54:06,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:54:06,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:06,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039893001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:06,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:06,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:06,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349504819] [2023-11-06 21:54:06,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:06,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:06,132 INFO L87 Difference]: Start difference. First operand 1609 states and 2321 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-06 21:54:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:06,344 INFO L93 Difference]: Finished difference Result 3296 states and 4735 transitions. [2023-11-06 21:54:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 169 [2023-11-06 21:54:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:06,362 INFO L225 Difference]: With dead ends: 3296 [2023-11-06 21:54:06,362 INFO L226 Difference]: Without dead ends: 1711 [2023-11-06 21:54:06,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:06,373 INFO L413 NwaCegarLoop]: 2247 mSDtfsCounter, 319 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 4240 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:06,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 4240 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:54:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2023-11-06 21:54:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1701. [2023-11-06 21:54:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1249 states have (on average 1.3714971977582067) internal successors, (1713), 1260 states have internal predecessors, (1713), 355 states have call successors, (355), 97 states have call predecessors, (355), 96 states have return successors, (354), 350 states have call predecessors, (354), 354 states have call successors, (354) [2023-11-06 21:54:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2422 transitions. [2023-11-06 21:54:06,578 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2422 transitions. Word has length 169 [2023-11-06 21:54:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:06,579 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 2422 transitions. [2023-11-06 21:54:06,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-06 21:54:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2422 transitions. [2023-11-06 21:54:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-06 21:54:06,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:06,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:06,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 21:54:06,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:06,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:06,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:06,811 INFO L85 PathProgramCache]: Analyzing trace with hash 791555828, now seen corresponding path program 1 times [2023-11-06 21:54:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:06,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101300323] [2023-11-06 21:54:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:06,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:07,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101300323] [2023-11-06 21:54:07,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237849707] [2023-11-06 21:54:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:07,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:07,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:07,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:54:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:07,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:54:07,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:54:08,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:08,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237849707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:08,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:08,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505200517] [2023-11-06 21:54:08,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:08,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:08,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:08,016 INFO L87 Difference]: Start difference. First operand 1701 states and 2422 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-06 21:54:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:08,339 INFO L93 Difference]: Finished difference Result 4790 states and 6852 transitions. [2023-11-06 21:54:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 184 [2023-11-06 21:54:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:08,370 INFO L225 Difference]: With dead ends: 4790 [2023-11-06 21:54:08,370 INFO L226 Difference]: Without dead ends: 3113 [2023-11-06 21:54:08,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:08,381 INFO L413 NwaCegarLoop]: 2383 mSDtfsCounter, 2213 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 4370 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:08,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2213 Valid, 4370 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:54:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2023-11-06 21:54:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 3105. [2023-11-06 21:54:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 2264 states have (on average 1.3736749116607774) internal successors, (3110), 2286 states have internal predecessors, (3110), 668 states have call successors, (668), 173 states have call predecessors, (668), 172 states have return successors, (667), 659 states have call predecessors, (667), 667 states have call successors, (667) [2023-11-06 21:54:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 4445 transitions. [2023-11-06 21:54:08,718 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 4445 transitions. Word has length 184 [2023-11-06 21:54:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:08,720 INFO L495 AbstractCegarLoop]: Abstraction has 3105 states and 4445 transitions. [2023-11-06 21:54:08,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-06 21:54:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 4445 transitions. [2023-11-06 21:54:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-06 21:54:08,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:08,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:08,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:08,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:54:08,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:08,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1019294668, now seen corresponding path program 1 times [2023-11-06 21:54:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485971823] [2023-11-06 21:54:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:09,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:09,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485971823] [2023-11-06 21:54:09,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:09,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565837469] [2023-11-06 21:54:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:09,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:09,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:09,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:09,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:54:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:10,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:10,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:54:10,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565837469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:10,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:10,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:10,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022063663] [2023-11-06 21:54:10,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:10,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:10,261 INFO L87 Difference]: Start difference. First operand 3105 states and 4445 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-06 21:54:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:10,540 INFO L93 Difference]: Finished difference Result 6444 states and 9210 transitions. [2023-11-06 21:54:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:54:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 185 [2023-11-06 21:54:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:10,570 INFO L225 Difference]: With dead ends: 6444 [2023-11-06 21:54:10,570 INFO L226 Difference]: Without dead ends: 3363 [2023-11-06 21:54:10,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:10,585 INFO L413 NwaCegarLoop]: 2563 mSDtfsCounter, 381 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 7296 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:10,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 7296 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:54:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2023-11-06 21:54:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3107. [2023-11-06 21:54:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 2266 states have (on average 1.3733451015004412) internal successors, (3112), 2288 states have internal predecessors, (3112), 668 states have call successors, (668), 173 states have call predecessors, (668), 172 states have return successors, (667), 659 states have call predecessors, (667), 667 states have call successors, (667) [2023-11-06 21:54:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 4447 transitions. [2023-11-06 21:54:10,905 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 4447 transitions. Word has length 185 [2023-11-06 21:54:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:10,905 INFO L495 AbstractCegarLoop]: Abstraction has 3107 states and 4447 transitions. [2023-11-06 21:54:10,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-06 21:54:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 4447 transitions. [2023-11-06 21:54:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-06 21:54:10,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:10,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:10,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:11,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:54:11,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:11,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1960058594, now seen corresponding path program 1 times [2023-11-06 21:54:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:11,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816314115] [2023-11-06 21:54:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:11,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:11,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816314115] [2023-11-06 21:54:11,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30917603] [2023-11-06 21:54:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:11,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:11,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:11,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:11,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:54:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:12,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:12,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:54:12,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:12,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30917603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:12,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:12,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131415053] [2023-11-06 21:54:12,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:12,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:12,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:12,315 INFO L87 Difference]: Start difference. First operand 3107 states and 4447 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-06 21:54:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:12,604 INFO L93 Difference]: Finished difference Result 6449 states and 9215 transitions. [2023-11-06 21:54:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:54:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 196 [2023-11-06 21:54:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:12,647 INFO L225 Difference]: With dead ends: 6449 [2023-11-06 21:54:12,647 INFO L226 Difference]: Without dead ends: 3366 [2023-11-06 21:54:12,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:12,661 INFO L413 NwaCegarLoop]: 2563 mSDtfsCounter, 381 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 7296 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:12,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 7296 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:54:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2023-11-06 21:54:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3107. [2023-11-06 21:54:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 2266 states have (on average 1.3733451015004412) internal successors, (3112), 2288 states have internal predecessors, (3112), 668 states have call successors, (668), 173 states have call predecessors, (668), 172 states have return successors, (667), 659 states have call predecessors, (667), 667 states have call successors, (667) [2023-11-06 21:54:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 4447 transitions. [2023-11-06 21:54:12,887 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 4447 transitions. Word has length 196 [2023-11-06 21:54:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:12,888 INFO L495 AbstractCegarLoop]: Abstraction has 3107 states and 4447 transitions. [2023-11-06 21:54:12,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-06 21:54:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 4447 transitions. [2023-11-06 21:54:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 21:54:12,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:12,907 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:12,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:13,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:13,118 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:13,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:13,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1838392286, now seen corresponding path program 1 times [2023-11-06 21:54:13,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:13,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253839075] [2023-11-06 21:54:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:13,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:13,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:13,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253839075] [2023-11-06 21:54:13,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:13,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107637216] [2023-11-06 21:54:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:13,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:13,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:13,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:54:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:14,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:54:14,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-06 21:54:14,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:14,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107637216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:14,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:14,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007554584] [2023-11-06 21:54:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:14,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:14,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:14,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:14,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:14,386 INFO L87 Difference]: Start difference. First operand 3107 states and 4447 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-06 21:54:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:14,558 INFO L93 Difference]: Finished difference Result 6191 states and 8869 transitions. [2023-11-06 21:54:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 245 [2023-11-06 21:54:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:14,581 INFO L225 Difference]: With dead ends: 6191 [2023-11-06 21:54:14,581 INFO L226 Difference]: Without dead ends: 3108 [2023-11-06 21:54:14,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:14,594 INFO L413 NwaCegarLoop]: 2243 mSDtfsCounter, 0 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4480 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:14,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4480 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:54:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2023-11-06 21:54:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 3108. [2023-11-06 21:54:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 2267 states have (on average 1.3731804146449051) internal successors, (3113), 2289 states have internal predecessors, (3113), 668 states have call successors, (668), 173 states have call predecessors, (668), 172 states have return successors, (667), 659 states have call predecessors, (667), 667 states have call successors, (667) [2023-11-06 21:54:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4448 transitions. [2023-11-06 21:54:14,800 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4448 transitions. Word has length 245 [2023-11-06 21:54:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:14,801 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4448 transitions. [2023-11-06 21:54:14,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-06 21:54:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4448 transitions. [2023-11-06 21:54:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 21:54:14,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:14,820 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:14,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:15,032 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:15,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 433200608, now seen corresponding path program 1 times [2023-11-06 21:54:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133837179] [2023-11-06 21:54:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:15,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:15,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133837179] [2023-11-06 21:54:15,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:15,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837326368] [2023-11-06 21:54:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:15,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:15,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:15,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:54:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:16,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:16,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-06 21:54:16,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:16,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837326368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:16,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:16,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:16,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168718971] [2023-11-06 21:54:16,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:16,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:16,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:16,427 INFO L87 Difference]: Start difference. First operand 3108 states and 4448 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-06 21:54:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:16,712 INFO L93 Difference]: Finished difference Result 6192 states and 8869 transitions. [2023-11-06 21:54:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:16,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 245 [2023-11-06 21:54:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:16,754 INFO L225 Difference]: With dead ends: 6192 [2023-11-06 21:54:16,754 INFO L226 Difference]: Without dead ends: 3108 [2023-11-06 21:54:16,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:16,770 INFO L413 NwaCegarLoop]: 2239 mSDtfsCounter, 2161 mSDsluCounter, 2235 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 4474 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:16,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 4474 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:54:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2023-11-06 21:54:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 3108. [2023-11-06 21:54:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 2267 states have (on average 1.37273930304367) internal successors, (3112), 2289 states have internal predecessors, (3112), 668 states have call successors, (668), 173 states have call predecessors, (668), 172 states have return successors, (667), 659 states have call predecessors, (667), 667 states have call successors, (667) [2023-11-06 21:54:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4447 transitions. [2023-11-06 21:54:17,119 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4447 transitions. Word has length 245 [2023-11-06 21:54:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:17,120 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4447 transitions. [2023-11-06 21:54:17,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-06 21:54:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4447 transitions. [2023-11-06 21:54:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-06 21:54:17,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:17,145 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:17,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:17,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:54:17,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:17,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1879781474, now seen corresponding path program 1 times [2023-11-06 21:54:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:17,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711191251] [2023-11-06 21:54:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:17,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:17,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723366317] [2023-11-06 21:54:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:17,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:17,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:17,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:17,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:54:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:18,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:54:18,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-06 21:54:18,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:18,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711191251] [2023-11-06 21:54:18,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723366317] [2023-11-06 21:54:18,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723366317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:18,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:18,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:54:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081791337] [2023-11-06 21:54:18,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:18,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:54:18,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:54:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:54:18,942 INFO L87 Difference]: Start difference. First operand 3108 states and 4447 transitions. Second operand has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-06 21:54:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:19,660 INFO L93 Difference]: Finished difference Result 6685 states and 9573 transitions. [2023-11-06 21:54:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:54:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 245 [2023-11-06 21:54:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:19,686 INFO L225 Difference]: With dead ends: 6685 [2023-11-06 21:54:19,686 INFO L226 Difference]: Without dead ends: 3601 [2023-11-06 21:54:19,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:54:19,704 INFO L413 NwaCegarLoop]: 2571 mSDtfsCounter, 686 mSDsluCounter, 9989 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 12560 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:19,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 12560 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:54:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2023-11-06 21:54:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 3116. [2023-11-06 21:54:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 2272 states have (on average 1.371919014084507) internal successors, (3117), 2294 states have internal predecessors, (3117), 671 states have call successors, (671), 173 states have call predecessors, (671), 172 states have return successors, (670), 662 states have call predecessors, (670), 670 states have call successors, (670) [2023-11-06 21:54:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 4458 transitions. [2023-11-06 21:54:20,022 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 4458 transitions. Word has length 245 [2023-11-06 21:54:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:20,023 INFO L495 AbstractCegarLoop]: Abstraction has 3116 states and 4458 transitions. [2023-11-06 21:54:20,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-06 21:54:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 4458 transitions. [2023-11-06 21:54:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-06 21:54:20,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:20,046 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:20,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:54:20,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:20,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1455816351, now seen corresponding path program 1 times [2023-11-06 21:54:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500200720] [2023-11-06 21:54:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:20,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:20,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882132685] [2023-11-06 21:54:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:20,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:20,513 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:20,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:54:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:21,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 3017 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:54:21,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:54:22,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:54:22,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-06 21:54:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 21:54:22,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:23,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2023-11-06 21:54:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-06 21:54:23,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:23,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500200720] [2023-11-06 21:54:23,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882132685] [2023-11-06 21:54:23,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882132685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:23,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:23,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-11-06 21:54:23,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714723294] [2023-11-06 21:54:23,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:23,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:54:23,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:23,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:54:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:54:23,774 INFO L87 Difference]: Start difference. First operand 3116 states and 4458 transitions. Second operand has 29 states, 29 states have (on average 10.03448275862069) internal successors, (291), 25 states have internal predecessors, (291), 15 states have call successors, (60), 6 states have call predecessors, (60), 5 states have return successors, (56), 16 states have call predecessors, (56), 14 states have call successors, (56) [2023-11-06 21:54:28,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:54:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:44,577 INFO L93 Difference]: Finished difference Result 7961 states and 11641 transitions. [2023-11-06 21:54:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:54:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 10.03448275862069) internal successors, (291), 25 states have internal predecessors, (291), 15 states have call successors, (60), 6 states have call predecessors, (60), 5 states have return successors, (56), 16 states have call predecessors, (56), 14 states have call successors, (56) Word has length 250 [2023-11-06 21:54:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:44,608 INFO L225 Difference]: With dead ends: 7961 [2023-11-06 21:54:44,608 INFO L226 Difference]: Without dead ends: 4869 [2023-11-06 21:54:44,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=304, Invalid=1336, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 21:54:44,620 INFO L413 NwaCegarLoop]: 1934 mSDtfsCounter, 7466 mSDsluCounter, 25698 mSDsCounter, 0 mSdLazyCounter, 11238 mSolverCounterSat, 1923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7489 SdHoareTripleChecker+Valid, 27632 SdHoareTripleChecker+Invalid, 13161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1923 IncrementalHoareTripleChecker+Valid, 11238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:44,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7489 Valid, 27632 Invalid, 13161 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1923 Valid, 11238 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2023-11-06 21:54:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2023-11-06 21:54:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 4701. [2023-11-06 21:54:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 3456 states have (on average 1.3969907407407407) internal successors, (4828), 3496 states have internal predecessors, (4828), 1055 states have call successors, (1055), 189 states have call predecessors, (1055), 189 states have return successors, (1056), 1037 states have call predecessors, (1056), 1054 states have call successors, (1056) [2023-11-06 21:54:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 6939 transitions. [2023-11-06 21:54:45,213 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 6939 transitions. Word has length 250 [2023-11-06 21:54:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:45,214 INFO L495 AbstractCegarLoop]: Abstraction has 4701 states and 6939 transitions. [2023-11-06 21:54:45,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 10.03448275862069) internal successors, (291), 25 states have internal predecessors, (291), 15 states have call successors, (60), 6 states have call predecessors, (60), 5 states have return successors, (56), 16 states have call predecessors, (56), 14 states have call successors, (56) [2023-11-06 21:54:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 6939 transitions. [2023-11-06 21:54:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-06 21:54:45,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:45,246 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:45,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:45,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:45,460 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:45,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:45,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1484447403, now seen corresponding path program 1 times [2023-11-06 21:54:45,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:45,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150589288] [2023-11-06 21:54:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:45,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:45,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:45,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149602919] [2023-11-06 21:54:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:45,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:45,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:45,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:54:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:46,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-06 21:54:46,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:46,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-06 21:54:47,524 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:54:47,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 21:54:47,558 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:54:47,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 21:54:47,741 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:54:47,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 21:54:47,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-06 21:54:48,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-06 21:54:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 21:54:48,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:48,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:48,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150589288] [2023-11-06 21:54:48,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:48,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149602919] [2023-11-06 21:54:48,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149602919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:48,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:54:48,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-06 21:54:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628204463] [2023-11-06 21:54:48,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:48,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 21:54:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 21:54:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:48,676 INFO L87 Difference]: Start difference. First operand 4701 states and 6939 transitions. Second operand has 22 states, 22 states have (on average 8.090909090909092) internal successors, (178), 18 states have internal predecessors, (178), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-06 21:54:50,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:55:17,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 21:55:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:21,210 INFO L93 Difference]: Finished difference Result 9075 states and 13361 transitions. [2023-11-06 21:55:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:55:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.090909090909092) internal successors, (178), 18 states have internal predecessors, (178), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) Word has length 257 [2023-11-06 21:55:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:21,251 INFO L225 Difference]: With dead ends: 9075 [2023-11-06 21:55:21,251 INFO L226 Difference]: Without dead ends: 5983 [2023-11-06 21:55:21,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 310 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 21:55:21,265 INFO L413 NwaCegarLoop]: 1875 mSDtfsCounter, 1517 mSDsluCounter, 20997 mSDsCounter, 0 mSdLazyCounter, 19020 mSolverCounterSat, 552 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 22872 SdHoareTripleChecker+Invalid, 19573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 19020 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:21,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 22872 Invalid, 19573 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [552 Valid, 19020 Invalid, 1 Unknown, 0 Unchecked, 31.2s Time] [2023-11-06 21:55:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2023-11-06 21:55:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 5342. [2023-11-06 21:55:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 3985 states have (on average 1.3902132998745296) internal successors, (5540), 4034 states have internal predecessors, (5540), 1125 states have call successors, (1125), 227 states have call predecessors, (1125), 231 states have return successors, (1141), 1102 states have call predecessors, (1141), 1124 states have call successors, (1141) [2023-11-06 21:55:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 7806 transitions. [2023-11-06 21:55:21,979 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 7806 transitions. Word has length 257 [2023-11-06 21:55:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:21,981 INFO L495 AbstractCegarLoop]: Abstraction has 5342 states and 7806 transitions. [2023-11-06 21:55:21,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.090909090909092) internal successors, (178), 18 states have internal predecessors, (178), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-06 21:55:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 7806 transitions. [2023-11-06 21:55:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-06 21:55:22,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:22,011 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:22,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:22,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:22,226 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:22,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash -349340974, now seen corresponding path program 1 times [2023-11-06 21:55:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:22,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261298775] [2023-11-06 21:55:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:22,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:22,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81142393] [2023-11-06 21:55:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:22,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:22,373 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:22,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:55:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:23,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 21:55:23,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:23,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-06 21:55:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:55:23,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-06 21:55:24,405 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:55:24,406 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 21:55:24,448 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:55:24,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 21:55:24,687 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:55:24,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 21:55:24,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-06 21:55:25,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-06 21:55:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 43 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 21:55:25,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:25,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:25,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261298775] [2023-11-06 21:55:25,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:25,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81142393] [2023-11-06 21:55:25,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81142393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:25,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:55:25,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-11-06 21:55:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799148177] [2023-11-06 21:55:25,841 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:25,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:55:25,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:55:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:55:25,843 INFO L87 Difference]: Start difference. First operand 5342 states and 7806 transitions. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 22 states have internal predecessors, (179), 10 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (31), 12 states have call predecessors, (31), 10 states have call successors, (31) [2023-11-06 21:55:28,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:03,975 INFO L93 Difference]: Finished difference Result 9742 states and 14252 transitions. [2023-11-06 21:56:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:56:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 22 states have internal predecessors, (179), 10 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (31), 12 states have call predecessors, (31), 10 states have call successors, (31) Word has length 258 [2023-11-06 21:56:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:04,022 INFO L225 Difference]: With dead ends: 9742 [2023-11-06 21:56:04,022 INFO L226 Difference]: Without dead ends: 6554 [2023-11-06 21:56:04,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 308 SyntacticMatches, 17 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 21:56:04,040 INFO L413 NwaCegarLoop]: 1863 mSDtfsCounter, 2149 mSDsluCounter, 24105 mSDsCounter, 0 mSdLazyCounter, 21582 mSolverCounterSat, 658 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2352 SdHoareTripleChecker+Valid, 25968 SdHoareTripleChecker+Invalid, 22241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 21582 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:04,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2352 Valid, 25968 Invalid, 22241 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [658 Valid, 21582 Invalid, 1 Unknown, 0 Unchecked, 35.9s Time] [2023-11-06 21:56:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2023-11-06 21:56:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 5894. [2023-11-06 21:56:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5894 states, 4437 states have (on average 1.3847194050033806) internal successors, (6144), 4492 states have internal predecessors, (6144), 1189 states have call successors, (1189), 263 states have call predecessors, (1189), 267 states have return successors, (1211), 1160 states have call predecessors, (1211), 1188 states have call successors, (1211) [2023-11-06 21:56:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5894 states to 5894 states and 8544 transitions. [2023-11-06 21:56:04,869 INFO L78 Accepts]: Start accepts. Automaton has 5894 states and 8544 transitions. Word has length 258 [2023-11-06 21:56:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:04,870 INFO L495 AbstractCegarLoop]: Abstraction has 5894 states and 8544 transitions. [2023-11-06 21:56:04,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 22 states have internal predecessors, (179), 10 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (31), 12 states have call predecessors, (31), 10 states have call successors, (31) [2023-11-06 21:56:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 5894 states and 8544 transitions. [2023-11-06 21:56:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-06 21:56:04,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:04,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:04,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:05,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:05,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:05,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1566430219, now seen corresponding path program 2 times [2023-11-06 21:56:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:05,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535372295] [2023-11-06 21:56:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:05,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:05,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740358674] [2023-11-06 21:56:05,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:56:05,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:05,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:05,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:05,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:56:06,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:56:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:06,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:56:06,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-06 21:56:06,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:06,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:06,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535372295] [2023-11-06 21:56:06,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:06,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740358674] [2023-11-06 21:56:06,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740358674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:06,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:06,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:56:06,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763336106] [2023-11-06 21:56:06,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:06,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:56:06,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:06,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:56:06,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:56:06,497 INFO L87 Difference]: Start difference. First operand 5894 states and 8544 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-06 21:56:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:06,979 INFO L93 Difference]: Finished difference Result 5901 states and 8552 transitions. [2023-11-06 21:56:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:56:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 264 [2023-11-06 21:56:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:07,007 INFO L225 Difference]: With dead ends: 5901 [2023-11-06 21:56:07,007 INFO L226 Difference]: Without dead ends: 5898 [2023-11-06 21:56:07,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:56:07,013 INFO L413 NwaCegarLoop]: 2241 mSDtfsCounter, 1 mSDsluCounter, 4474 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6715 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:07,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6715 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:56:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5898 states. [2023-11-06 21:56:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5898 to 5896. [2023-11-06 21:56:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 4439 states have (on average 1.3845460689344447) internal successors, (6146), 4494 states have internal predecessors, (6146), 1189 states have call successors, (1189), 263 states have call predecessors, (1189), 267 states have return successors, (1211), 1160 states have call predecessors, (1211), 1188 states have call successors, (1211) [2023-11-06 21:56:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8546 transitions. [2023-11-06 21:56:07,805 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8546 transitions. Word has length 264 [2023-11-06 21:56:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:07,807 INFO L495 AbstractCegarLoop]: Abstraction has 5896 states and 8546 transitions. [2023-11-06 21:56:07,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-06 21:56:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8546 transitions. [2023-11-06 21:56:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-06 21:56:07,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:07,828 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:07,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:08,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:08,040 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:08,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:08,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1264107564, now seen corresponding path program 1 times [2023-11-06 21:56:08,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:08,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635003234] [2023-11-06 21:56:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:08,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:08,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:08,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680422401] [2023-11-06 21:56:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:08,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:08,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403e1d75-d4b0-4c32-845b-8d9770afb119/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:56:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:09,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:56:09,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:09,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:09,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:56:10,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-06 21:56:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-06 21:56:10,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:10,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2023-11-06 21:56:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-06 21:56:11,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:11,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635003234] [2023-11-06 21:56:11,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:11,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680422401] [2023-11-06 21:56:11,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680422401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:11,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:56:11,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2023-11-06 21:56:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686323702] [2023-11-06 21:56:11,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:56:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:11,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:56:11,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:56:11,123 INFO L87 Difference]: Start difference. First operand 5896 states and 8546 transitions. Second operand has 30 states, 30 states have (on average 8.666666666666666) internal successors, (260), 26 states have internal predecessors, (260), 14 states have call successors, (56), 5 states have call predecessors, (56), 4 states have return successors, (53), 15 states have call predecessors, (53), 13 states have call successors, (53) [2023-11-06 21:56:13,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:15,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:17,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:20,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:23,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:25,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:28,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:32,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:35,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 21:56:38,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:40,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:45,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:47,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:50,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:53,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 21:57:00,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:02,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]