./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/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_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/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_b2ddef78-ef3d-40ff-9692-b45edbbe9440/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 bdcb32e90fffda272ef4414cda96d9fa59a53e22555da4af86a588968a9c4dd7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:41:54,434 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:41:54,563 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-06 22:41:54,572 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:41:54,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:41:54,612 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:41:54,613 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:41:54,614 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:41:54,615 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:41:54,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:41:54,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:41:54,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:41:54,623 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:41:54,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:41:54,625 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:41:54,626 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:41:54,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:41:54,627 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:41:54,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:41:54,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:41:54,628 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:41:54,629 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:41:54,630 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:41:54,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:41:54,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:41:54,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:54,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:41:54,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:41:54,633 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:41:54,633 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:41:54,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:41:54,635 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:41:54,635 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:41:54,640 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:41:54,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:41:54,640 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:41:54,640 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_b2ddef78-ef3d-40ff-9692-b45edbbe9440/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdcb32e90fffda272ef4414cda96d9fa59a53e22555da4af86a588968a9c4dd7 [2023-11-06 22:41:54,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:41:54,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:41:54,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:41:54,952 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:41:54,953 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:41:54,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i [2023-11-06 22:41:58,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:41:58,966 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:41:58,969 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i [2023-11-06 22:41:59,040 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/data/57d5d7aa2/ee4451825c0648e8914c9c7f17886e67/FLAG88d1de079 [2023-11-06 22:41:59,061 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/data/57d5d7aa2/ee4451825c0648e8914c9c7f17886e67 [2023-11-06 22:41:59,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:41:59,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:41:59,073 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:59,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:41:59,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:41:59,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:59" (1/1) ... [2023-11-06 22:41:59,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505f0237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:59, skipping insertion in model container [2023-11-06 22:41:59,082 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:59" (1/1) ... [2023-11-06 22:41:59,283 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:02,623 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_b2ddef78-ef3d-40ff-9692-b45edbbe9440/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i[355549,355562] [2023-11-06 22:42:02,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:02,763 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:42:02,990 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; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5920] [2023-11-06 22:42:02,992 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; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5927] [2023-11-06 22:42:02,993 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; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [5935-5936] [2023-11-06 22:42:03,003 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)); [6070] [2023-11-06 22:42:03,004 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)); [6077] [2023-11-06 22:42:03,006 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("movl %1,%0": "=r" (ret): "m" (*((unsigned int volatile *)addr)): "memory"); [6180] [2023-11-06 22:42:03,007 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("movl %0,%1": : "r" (val), "m" (*((unsigned int volatile *)addr)): "memory"); [6187] [2023-11-06 22:42:03,020 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/asm-generic/dma-mapping-common.h"), "i" (19), "i" (12UL)); [6416-6417] [2023-11-06 22:42:03,023 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/asm-generic/dma-mapping-common.h"), "i" (36), "i" (12UL)); [6445-6446] [2023-11-06 22:42:03,025 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/asm-generic/dma-mapping-common.h"), "i" (84), "i" (12UL)); [6479-6480] [2023-11-06 22:42:03,026 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/asm-generic/dma-mapping-common.h"), "i" (96), "i" (12UL)); [6503-6504] [2023-11-06 22:42:03,038 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/netdevice.h"), "i" (507), "i" (12UL)); [6839-6840] [2023-11-06 22:42:03,038 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [6845] [2023-11-06 22:42:03,136 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [8805] [2023-11-06 22:42:03,139 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [8861] [2023-11-06 22:42:03,147 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)skb->data) [8969] [2023-11-06 22:42:03,150 WARN L75 lationResultReporter]: Unsoundness Warning: ignored call to __builtin_prefetch C: __builtin_prefetch((void const *)skb2->data) [9016] [2023-11-06 22:42:03,153 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("lfence": : : "memory"); [9060] [2023-11-06 22:42:03,183 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [9406] [2023-11-06 22:42:03,183 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [9412] [2023-11-06 22:42:03,185 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [9430] [2023-11-06 22:42:03,305 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_b2ddef78-ef3d-40ff-9692-b45edbbe9440/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i[355549,355562] [2023-11-06 22:42:03,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:03,615 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:42:03,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03 WrapperNode [2023-11-06 22:42:03,616 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:03,617 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:03,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:42:03,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:42:03,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:03,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,002 INFO L138 Inliner]: procedures = 409, calls = 2719, calls flagged for inlining = 209, calls inlined = 190, statements flattened = 6957 [2023-11-06 22:42:04,003 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:04,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:42:04,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:42:04,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:42:04,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,051 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,301 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:42:04,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:42:04,423 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:42:04,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:42:04,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (1/1) ... [2023-11-06 22:42:04,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:04,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:42:04,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:42:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_link_speed [2023-11-06 22:42:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_link_speed [2023-11-06 22:42:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2023-11-06 22:42:04,508 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2023-11-06 22:42:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-06 22:42:04,508 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-06 22:42:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2023-11-06 22:42:04,509 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2023-11-06 22:42:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure ql_link_state_machine_work [2023-11-06 22:42:04,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_link_state_machine_work [2023-11-06 22:42:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2023-11-06 22:42:04,510 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2023-11-06 22:42:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-06 22:42:04,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-06 22:42:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-06 22:42:04,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-06 22:42:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2023-11-06 22:42:04,515 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2023-11-06 22:42:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2023-11-06 22:42:04,515 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2023-11-06 22:42:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure ql_this_adapter_controls_port [2023-11-06 22:42:04,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_this_adapter_controls_port [2023-11-06 22:42:04,516 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_3 [2023-11-06 22:42:04,516 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_3 [2023-11-06 22:42:04,516 INFO L130 BoogieDeclarations]: Found specification of procedure ql_enable_interrupts [2023-11-06 22:42:04,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_enable_interrupts [2023-11-06 22:42:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2023-11-06 22:42:04,517 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2023-11-06 22:42:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-11-06 22:42:04,518 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-11-06 22:42:04,518 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg_l [2023-11-06 22:42:04,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg_l [2023-11-06 22:42:04,518 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_send_free_list [2023-11-06 22:42:04,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_send_free_list [2023-11-06 22:42:04,518 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2023-11-06 22:42:04,519 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2023-11-06 22:42:04,519 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2023-11-06 22:42:04,519 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2023-11-06 22:42:04,519 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-06 22:42:04,519 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-06 22:42:04,519 INFO L130 BoogieDeclarations]: Found specification of procedure ssleep [2023-11-06 22:42:04,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ssleep [2023-11-06 22:42:04,520 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_set_mac_address [2023-11-06 22:42:04,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_set_mac_address [2023-11-06 22:42:04,520 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cycle_adapter [2023-11-06 22:42:04,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cycle_adapter [2023-11-06 22:42:04,520 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mac_cfg_soft_reset [2023-11-06 22:42:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mac_cfg_soft_reset [2023-11-06 22:42:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-06 22:42:04,522 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-06 22:42:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2023-11-06 22:42:04,523 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2023-11-06 22:42:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-11-06 22:42:04,523 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-11-06 22:42:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_disable_scan_mode [2023-11-06 22:42:04,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_disable_scan_mode [2023-11-06 22:42:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-06 22:42:04,524 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-06 22:42:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2023-11-06 22:42:04,524 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2023-11-06 22:42:04,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:42:04,525 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2023-11-06 22:42:04,525 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2023-11-06 22:42:04,525 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg_l [2023-11-06 22:42:04,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg_l [2023-11-06 22:42:04,525 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_up [2023-11-06 22:42:04,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_up [2023-11-06 22:42:04,526 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2023-11-06 22:42:04,526 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2023-11-06 22:42:04,526 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-06 22:42:04,526 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-06 22:42:04,526 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-11-06 22:42:04,527 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-11-06 22:42:04,527 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_consistent_dma_mask [2023-11-06 22:42:04,528 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_consistent_dma_mask [2023-11-06 22:42:04,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-06 22:42:04,528 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2023-11-06 22:42:04,528 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2023-11-06 22:42:04,528 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-06 22:42:04,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-06 22:42:04,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-06 22:42:04,529 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_5 [2023-11-06 22:42:04,529 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_5 [2023-11-06 22:42:04,529 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page1_reg [2023-11-06 22:42:04,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page1_reg [2023-11-06 22:42:04,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:42:04,529 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2023-11-06 22:42:04,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2023-11-06 22:42:04,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-06 22:42:04,530 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-06 22:42:04,530 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-06 22:42:04,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-06 22:42:04,530 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2023-11-06 22:42:04,531 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2023-11-06 22:42:04,531 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2023-11-06 22:42:04,531 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2023-11-06 22:42:04,531 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_register_page [2023-11-06 22:42:04,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_register_page [2023-11-06 22:42:04,532 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2023-11-06 22:42:04,532 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2023-11-06 22:42:04,532 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg_ex [2023-11-06 22:42:04,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg_ex [2023-11-06 22:42:04,533 INFO L130 BoogieDeclarations]: Found specification of procedure ql_phy_init_ex [2023-11-06 22:42:04,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_phy_init_ex [2023-11-06 22:42:04,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-06 22:42:04,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-06 22:42:04,534 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg_l [2023-11-06 22:42:04,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg_l [2023-11-06 22:42:04,534 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_common_reg [2023-11-06 22:42:04,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_common_reg [2023-11-06 22:42:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:42:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_spinlock [2023-11-06 22:42:04,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_spinlock [2023-11-06 22:42:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page2_reg [2023-11-06 22:42:04,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page2_reg [2023-11-06 22:42:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:42:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_5 [2023-11-06 22:42:04,536 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_5 [2023-11-06 22:42:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_common_reg [2023-11-06 22:42:04,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_common_reg [2023-11-06 22:42:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-06 22:42:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-06 22:42:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:42:04,537 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_read_reg [2023-11-06 22:42:04,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_read_reg [2023-11-06 22:42:04,538 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_unlock [2023-11-06 22:42:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_unlock [2023-11-06 22:42:04,538 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_printk [2023-11-06 22:42:04,538 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_printk [2023-11-06 22:42:04,538 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2023-11-06 22:42:04,539 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2023-11-06 22:42:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_nvram_reg [2023-11-06 22:42:04,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_nvram_reg [2023-11-06 22:42:04,540 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2023-11-06 22:42:04,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2023-11-06 22:42:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2023-11-06 22:42:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2023-11-06 22:42:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_drvr_lock [2023-11-06 22:42:04,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_drvr_lock [2023-11-06 22:42:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2023-11-06 22:42:04,546 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2023-11-06 22:42:04,547 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_enable_scan_mode [2023-11-06 22:42:04,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_enable_scan_mode [2023-11-06 22:42:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2023-11-06 22:42:04,553 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2023-11-06 22:42:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure ql_tx_timeout_work [2023-11-06 22:42:04,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_tx_timeout_work [2023-11-06 22:42:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2023-11-06 22:42:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2023-11-06 22:42:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-06 22:42:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-06 22:42:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:42:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:42:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_for_mii_ready [2023-11-06 22:42:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_for_mii_ready [2023-11-06 22:42:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-06 22:42:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-06 22:42:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_large_buffers [2023-11-06 22:42:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_large_buffers [2023-11-06 22:42:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-06 22:42:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-06 22:42:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-06 22:42:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-06 22:42:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2023-11-06 22:42:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2023-11-06 22:42:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2023-11-06 22:42:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2023-11-06 22:42:04,558 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_interrupts [2023-11-06 22:42:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_interrupts [2023-11-06 22:42:04,558 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2023-11-06 22:42:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2023-11-06 22:42:04,558 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2023-11-06 22:42:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2023-11-06 22:42:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_page0_reg [2023-11-06 22:42:04,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_page0_reg [2023-11-06 22:42:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-06 22:42:04,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-06 22:42:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2023-11-06 22:42:04,559 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2023-11-06 22:42:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2023-11-06 22:42:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2023-11-06 22:42:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure PHY_Setup [2023-11-06 22:42:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure PHY_Setup [2023-11-06 22:42:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-06 22:42:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-06 22:42:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_buffer_queues [2023-11-06 22:42:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_buffer_queues [2023-11-06 22:42:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:42:04,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:42:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-06 22:42:04,561 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-06 22:42:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2023-11-06 22:42:04,561 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2023-11-06 22:42:04,561 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2023-11-06 22:42:04,562 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2023-11-06 22:42:04,562 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-11-06 22:42:04,562 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-11-06 22:42:04,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:42:04,562 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-06 22:42:04,562 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-06 22:42:04,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:42:04,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-06 22:42:04,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-06 22:42:04,563 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_3 [2023-11-06 22:42:04,563 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_3 [2023-11-06 22:42:04,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 22:42:04,563 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_3 [2023-11-06 22:42:04,563 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_3 [2023-11-06 22:42:04,564 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-06 22:42:04,564 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-06 22:42:04,564 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-11-06 22:42:04,564 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-11-06 22:42:04,564 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2023-11-06 22:42:04,564 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2023-11-06 22:42:04,564 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-06 22:42:04,564 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-06 22:42:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2023-11-06 22:42:04,565 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2023-11-06 22:42:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_page0_reg [2023-11-06 22:42:04,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_page0_reg [2023-11-06 22:42:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2023-11-06 22:42:04,565 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2023-11-06 22:42:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_link_full_dup [2023-11-06 22:42:04,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_link_full_dup [2023-11-06 22:42:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure ql_reset_work [2023-11-06 22:42:04,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_reset_work [2023-11-06 22:42:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2023-11-06 22:42:04,566 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2023-11-06 22:42:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure ql3xxx_tx_timeout [2023-11-06 22:42:04,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ql3xxx_tx_timeout [2023-11-06 22:42:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure ql_supported_modes [2023-11-06 22:42:04,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_supported_modes [2023-11-06 22:42:04,567 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2023-11-06 22:42:04,567 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2023-11-06 22:42:04,567 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-06 22:42:04,567 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-06 22:42:04,567 INFO L130 BoogieDeclarations]: Found specification of procedure ql_is_fiber [2023-11-06 22:42:04,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_is_fiber [2023-11-06 22:42:04,568 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2023-11-06 22:42:04,568 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2023-11-06 22:42:04,568 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-06 22:42:04,568 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-06 22:42:04,568 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_net_req_rsp_queues [2023-11-06 22:42:04,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_net_req_rsp_queues [2023-11-06 22:42:04,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:42:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2023-11-06 22:42:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2023-11-06 22:42:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-06 22:42:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-06 22:42:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg_ex [2023-11-06 22:42:04,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg_ex [2023-11-06 22:42:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_down [2023-11-06 22:42:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_down [2023-11-06 22:42:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-06 22:42:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-06 22:42:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure ql_port_start [2023-11-06 22:42:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_port_start [2023-11-06 22:42:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-06 22:42:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-06 22:42:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2023-11-06 22:42:04,571 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2023-11-06 22:42:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_auto_cfg_status [2023-11-06 22:42:04,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_auto_cfg_status [2023-11-06 22:42:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mii_write_reg [2023-11-06 22:42:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mii_write_reg [2023-11-06 22:42:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_3 [2023-11-06 22:42:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_3 [2023-11-06 22:42:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2023-11-06 22:42:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2023-11-06 22:42:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2023-11-06 22:42:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2023-11-06 22:42:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2023-11-06 22:42:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2023-11-06 22:42:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2023-11-06 22:42:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2023-11-06 22:42:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2023-11-06 22:42:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:42:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr [2023-11-06 22:42:04,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr [2023-11-06 22:42:05,748 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:42:05,754 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:42:06,119 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-06 22:42:12,607 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:42:12,637 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:42:12,637 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:42:12,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:12 BoogieIcfgContainer [2023-11-06 22:42:12,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:42:12,646 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:42:12,646 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:42:12,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:42:12,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:41:59" (1/3) ... [2023-11-06 22:42:12,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3370e3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:12, skipping insertion in model container [2023-11-06 22:42:12,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:03" (2/3) ... [2023-11-06 22:42:12,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3370e3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:12, skipping insertion in model container [2023-11-06 22:42:12,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:12" (3/3) ... [2023-11-06 22:42:12,655 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--qlogic--qla3xxx.ko-entry_point.cil.out.i [2023-11-06 22:42:12,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:42:12,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:42:12,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:42:12,813 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;@507ef6c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:42:12,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:42:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 2817 states, 1963 states have (on average 1.3861436576668364) internal successors, (2721), 2019 states have internal predecessors, (2721), 722 states have call successors, (722), 131 states have call predecessors, (722), 130 states have return successors, (712), 699 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-06 22:42:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-06 22:42:12,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:12,894 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2023-11-06 22:42:12,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:12,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:12,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1831353109, now seen corresponding path program 1 times [2023-11-06 22:42:12,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:12,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826013995] [2023-11-06 22:42:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:13,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826013995] [2023-11-06 22:42:13,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:13,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060478225] [2023-11-06 22:42:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:13,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:13,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:13,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:13,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:42:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:15,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 3460 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:42:15,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-11-06 22:42:15,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060478225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:15,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:15,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:15,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355387211] [2023-11-06 22:42:15,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:42:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:15,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:42:15,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:42:15,509 INFO L87 Difference]: Start difference. First operand has 2817 states, 1963 states have (on average 1.3861436576668364) internal successors, (2721), 2019 states have internal predecessors, (2721), 722 states have call successors, (722), 131 states have call predecessors, (722), 130 states have return successors, (712), 699 states have call predecessors, (712), 712 states have call successors, (712) Second operand has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-06 22:42:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:15,826 INFO L93 Difference]: Finished difference Result 5629 states and 8549 transitions. [2023-11-06 22:42:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:42:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 216 [2023-11-06 22:42:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:15,874 INFO L225 Difference]: With dead ends: 5629 [2023-11-06 22:42:15,874 INFO L226 Difference]: Without dead ends: 2791 [2023-11-06 22:42:15,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:42:15,913 INFO L413 NwaCegarLoop]: 4107 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4107 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:15,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2023-11-06 22:42:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2791. [2023-11-06 22:42:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 1949 states have (on average 1.3565931246793228) internal successors, (2644), 1993 states have internal predecessors, (2644), 712 states have call successors, (712), 130 states have call predecessors, (712), 129 states have return successors, (711), 698 states have call predecessors, (711), 711 states have call successors, (711) [2023-11-06 22:42:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 4067 transitions. [2023-11-06 22:42:16,235 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 4067 transitions. Word has length 216 [2023-11-06 22:42:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:16,236 INFO L495 AbstractCegarLoop]: Abstraction has 2791 states and 4067 transitions. [2023-11-06 22:42:16,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.5) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-06 22:42:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 4067 transitions. [2023-11-06 22:42:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-06 22:42:16,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:16,256 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2023-11-06 22:42:16,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:42:16,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:16,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:16,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1460596471, now seen corresponding path program 1 times [2023-11-06 22:42:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:16,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604819306] [2023-11-06 22:42:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:16,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:16,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:16,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489000819] [2023-11-06 22:42:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:16,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:16,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:16,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:42:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:18,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 3460 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:42:18,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-06 22:42:18,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:18,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:18,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604819306] [2023-11-06 22:42:18,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:18,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489000819] [2023-11-06 22:42:18,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489000819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:18,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:18,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:18,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104157891] [2023-11-06 22:42:18,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:18,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:18,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:18,281 INFO L87 Difference]: Start difference. First operand 2791 states and 4067 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-06 22:42:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:18,417 INFO L93 Difference]: Finished difference Result 2795 states and 4071 transitions. [2023-11-06 22:42:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 216 [2023-11-06 22:42:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:18,446 INFO L225 Difference]: With dead ends: 2795 [2023-11-06 22:42:18,446 INFO L226 Difference]: Without dead ends: 2792 [2023-11-06 22:42:18,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 214 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 22:42:18,450 INFO L413 NwaCegarLoop]: 4066 mSDtfsCounter, 0 mSDsluCounter, 4061 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8127 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:18,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8127 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2023-11-06 22:42:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2792. [2023-11-06 22:42:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 1950 states have (on average 1.3564102564102565) internal successors, (2645), 1994 states have internal predecessors, (2645), 712 states have call successors, (712), 130 states have call predecessors, (712), 129 states have return successors, (711), 698 states have call predecessors, (711), 711 states have call successors, (711) [2023-11-06 22:42:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4068 transitions. [2023-11-06 22:42:18,688 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4068 transitions. Word has length 216 [2023-11-06 22:42:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:18,691 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 4068 transitions. [2023-11-06 22:42:18,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-06 22:42:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4068 transitions. [2023-11-06 22:42:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-06 22:42:18,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:18,709 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2023-11-06 22:42:18,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:18,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:18,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1397920772, now seen corresponding path program 1 times [2023-11-06 22:42:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:18,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601926071] [2023-11-06 22:42:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:19,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564465851] [2023-11-06 22:42:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:19,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:19,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:19,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:19,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:42:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:20,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 3465 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:42:20,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-06 22:42:20,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:20,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601926071] [2023-11-06 22:42:20,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564465851] [2023-11-06 22:42:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564465851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:20,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:20,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:20,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675213932] [2023-11-06 22:42:20,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:20,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:20,827 INFO L87 Difference]: Start difference. First operand 2792 states and 4068 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-06 22:42:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:21,309 INFO L93 Difference]: Finished difference Result 7952 states and 11604 transitions. [2023-11-06 22:42:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:21,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 218 [2023-11-06 22:42:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:21,376 INFO L225 Difference]: With dead ends: 7952 [2023-11-06 22:42:21,377 INFO L226 Difference]: Without dead ends: 5187 [2023-11-06 22:42:21,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 216 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 22:42:21,393 INFO L413 NwaCegarLoop]: 4049 mSDtfsCounter, 3593 mSDsluCounter, 3890 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3593 SdHoareTripleChecker+Valid, 7939 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:21,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3593 Valid, 7939 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:42:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2023-11-06 22:42:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 5164. [2023-11-06 22:42:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5164 states, 3616 states have (on average 1.3586836283185841) internal successors, (4913), 3702 states have internal predecessors, (4913), 1306 states have call successors, (1306), 242 states have call predecessors, (1306), 241 states have return successors, (1305), 1276 states have call predecessors, (1305), 1305 states have call successors, (1305) [2023-11-06 22:42:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5164 states to 5164 states and 7524 transitions. [2023-11-06 22:42:21,722 INFO L78 Accepts]: Start accepts. Automaton has 5164 states and 7524 transitions. Word has length 218 [2023-11-06 22:42:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:21,723 INFO L495 AbstractCegarLoop]: Abstraction has 5164 states and 7524 transitions. [2023-11-06 22:42:21,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-06 22:42:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 5164 states and 7524 transitions. [2023-11-06 22:42:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:42:21,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:21,747 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:21,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:21,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:21,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:21,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash 708446559, now seen corresponding path program 1 times [2023-11-06 22:42:21,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:21,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690256343] [2023-11-06 22:42:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:22,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:22,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690256343] [2023-11-06 22:42:22,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:22,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473748104] [2023-11-06 22:42:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:22,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:22,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:22,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:22,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:42:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:24,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 4660 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:42:24,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-11-06 22:42:24,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473748104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:24,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:24,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200732454] [2023-11-06 22:42:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:24,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:24,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:24,133 INFO L87 Difference]: Start difference. First operand 5164 states and 7524 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 22:42:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:24,421 INFO L93 Difference]: Finished difference Result 10331 states and 15065 transitions. [2023-11-06 22:42:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 439 [2023-11-06 22:42:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:24,478 INFO L225 Difference]: With dead ends: 10331 [2023-11-06 22:42:24,478 INFO L226 Difference]: Without dead ends: 5194 [2023-11-06 22:42:24,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 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 22:42:24,515 INFO L413 NwaCegarLoop]: 4064 mSDtfsCounter, 12 mSDsluCounter, 4061 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8125 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:24,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 8125 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2023-11-06 22:42:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 5166. [2023-11-06 22:42:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 3618 states have (on average 1.3584853510226644) internal successors, (4915), 3704 states have internal predecessors, (4915), 1306 states have call successors, (1306), 242 states have call predecessors, (1306), 241 states have return successors, (1305), 1276 states have call predecessors, (1305), 1305 states have call successors, (1305) [2023-11-06 22:42:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 7526 transitions. [2023-11-06 22:42:24,798 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 7526 transitions. Word has length 439 [2023-11-06 22:42:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:24,799 INFO L495 AbstractCegarLoop]: Abstraction has 5166 states and 7526 transitions. [2023-11-06 22:42:24,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 22:42:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 7526 transitions. [2023-11-06 22:42:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2023-11-06 22:42:24,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:24,824 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:24,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:25,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:25,037 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:25,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1591423703, now seen corresponding path program 1 times [2023-11-06 22:42:25,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:25,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690368745] [2023-11-06 22:42:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:25,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690368745] [2023-11-06 22:42:25,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428704712] [2023-11-06 22:42:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:25,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:25,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:25,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:42:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:27,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 4679 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:42:27,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2023-11-06 22:42:27,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428704712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:27,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:27,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:27,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089004976] [2023-11-06 22:42:27,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:27,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:27,234 INFO L87 Difference]: Start difference. First operand 5166 states and 7526 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 22:42:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:27,511 INFO L93 Difference]: Finished difference Result 10313 states and 15070 transitions. [2023-11-06 22:42:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:27,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 446 [2023-11-06 22:42:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:27,577 INFO L225 Difference]: With dead ends: 10313 [2023-11-06 22:42:27,577 INFO L226 Difference]: Without dead ends: 5174 [2023-11-06 22:42:27,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 444 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 22:42:27,611 INFO L413 NwaCegarLoop]: 4065 mSDtfsCounter, 2 mSDsluCounter, 4063 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8128 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:27,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8128 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2023-11-06 22:42:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 5168. [2023-11-06 22:42:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5168 states, 3620 states have (on average 1.3582872928176795) internal successors, (4917), 3706 states have internal predecessors, (4917), 1306 states have call successors, (1306), 242 states have call predecessors, (1306), 241 states have return successors, (1305), 1276 states have call predecessors, (1305), 1305 states have call successors, (1305) [2023-11-06 22:42:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 7528 transitions. [2023-11-06 22:42:28,028 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 7528 transitions. Word has length 446 [2023-11-06 22:42:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:28,030 INFO L495 AbstractCegarLoop]: Abstraction has 5168 states and 7528 transitions. [2023-11-06 22:42:28,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 22:42:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 7528 transitions. [2023-11-06 22:42:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-06 22:42:28,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:28,065 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:28,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:28,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:28,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:28,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1709326706, now seen corresponding path program 1 times [2023-11-06 22:42:28,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:28,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663164461] [2023-11-06 22:42:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:28,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:28,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663164461] [2023-11-06 22:42:28,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:28,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199569473] [2023-11-06 22:42:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:28,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:28,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:28,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:28,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:42:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:30,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 4711 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:42:30,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2023-11-06 22:42:30,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-11-06 22:42:30,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199569473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:30,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:42:30,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-06 22:42:30,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389965479] [2023-11-06 22:42:30,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:30,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:42:30,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:30,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:42:30,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:42:30,854 INFO L87 Difference]: Start difference. First operand 5168 states and 7528 transitions. Second operand has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 2 states have call successors, (109), 2 states have call predecessors, (109), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-06 22:42:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:31,306 INFO L93 Difference]: Finished difference Result 10399 states and 15161 transitions. [2023-11-06 22:42:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 2 states have call successors, (109), 2 states have call predecessors, (109), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 450 [2023-11-06 22:42:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:31,384 INFO L225 Difference]: With dead ends: 10399 [2023-11-06 22:42:31,385 INFO L226 Difference]: Without dead ends: 5258 [2023-11-06 22:42:31,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:42:31,417 INFO L413 NwaCegarLoop]: 4064 mSDtfsCounter, 62 mSDsluCounter, 8124 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 12188 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:31,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 12188 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:42:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2023-11-06 22:42:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 5258. [2023-11-06 22:42:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5258 states, 3686 states have (on average 1.3551275094953878) internal successors, (4995), 3772 states have internal predecessors, (4995), 1330 states have call successors, (1330), 242 states have call predecessors, (1330), 241 states have return successors, (1329), 1300 states have call predecessors, (1329), 1329 states have call successors, (1329) [2023-11-06 22:42:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5258 states to 5258 states and 7654 transitions. [2023-11-06 22:42:31,715 INFO L78 Accepts]: Start accepts. Automaton has 5258 states and 7654 transitions. Word has length 450 [2023-11-06 22:42:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:31,716 INFO L495 AbstractCegarLoop]: Abstraction has 5258 states and 7654 transitions. [2023-11-06 22:42:31,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 2 states have call successors, (109), 2 states have call predecessors, (109), 2 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-06 22:42:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5258 states and 7654 transitions. [2023-11-06 22:42:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-11-06 22:42:31,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:31,741 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:31,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:31,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:31,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:31,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash -309302832, now seen corresponding path program 1 times [2023-11-06 22:42:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:31,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237861722] [2023-11-06 22:42:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:32,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:32,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548715482] [2023-11-06 22:42:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:32,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:32,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:32,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:42:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:33,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 4345 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:42:33,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-11-06 22:42:33,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:33,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237861722] [2023-11-06 22:42:33,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:33,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548715482] [2023-11-06 22:42:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548715482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:33,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:33,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:42:33,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974269095] [2023-11-06 22:42:33,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:33,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:42:33,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:33,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:42:33,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:42:33,988 INFO L87 Difference]: Start difference. First operand 5258 states and 7654 transitions. Second operand has 6 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 5 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 5 states have call successors, (43) [2023-11-06 22:42:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:34,627 INFO L93 Difference]: Finished difference Result 10583 states and 15443 transitions. [2023-11-06 22:42:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:34,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 5 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 5 states have call successors, (43) Word has length 363 [2023-11-06 22:42:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:34,663 INFO L225 Difference]: With dead ends: 10583 [2023-11-06 22:42:34,663 INFO L226 Difference]: Without dead ends: 5352 [2023-11-06 22:42:34,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:42:34,687 INFO L413 NwaCegarLoop]: 4093 mSDtfsCounter, 121 mSDsluCounter, 16160 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 20253 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:34,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 20253 Invalid, 114 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:42:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2023-11-06 22:42:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 5352. [2023-11-06 22:42:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 3740 states have (on average 1.352673796791444) internal successors, (5059), 3826 states have internal predecessors, (5059), 1366 states have call successors, (1366), 244 states have call predecessors, (1366), 245 states have return successors, (1367), 1336 states have call predecessors, (1367), 1365 states have call successors, (1367) [2023-11-06 22:42:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 7792 transitions. [2023-11-06 22:42:34,952 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 7792 transitions. Word has length 363 [2023-11-06 22:42:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:34,953 INFO L495 AbstractCegarLoop]: Abstraction has 5352 states and 7792 transitions. [2023-11-06 22:42:34,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 5 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 5 states have call successors, (43) [2023-11-06 22:42:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 7792 transitions. [2023-11-06 22:42:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:42:34,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:34,984 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:35,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:35,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:35,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:35,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash 89272733, now seen corresponding path program 1 times [2023-11-06 22:42:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:35,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299884481] [2023-11-06 22:42:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:35,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299884481] [2023-11-06 22:42:35,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417235544] [2023-11-06 22:42:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:35,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:35,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:35,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:35,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:42:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:37,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 4733 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:42:37,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2023-11-06 22:42:37,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2023-11-06 22:42:37,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417235544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:37,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:42:37,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:42:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541991517] [2023-11-06 22:42:37,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:37,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:42:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:42:37,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:42:37,892 INFO L87 Difference]: Start difference. First operand 5352 states and 7792 transitions. Second operand has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-06 22:42:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:38,443 INFO L93 Difference]: Finished difference Result 10857 states and 15821 transitions. [2023-11-06 22:42:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:42:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) Word has length 461 [2023-11-06 22:42:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:38,490 INFO L225 Difference]: With dead ends: 10857 [2023-11-06 22:42:38,490 INFO L226 Difference]: Without dead ends: 5532 [2023-11-06 22:42:38,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 910 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:42:38,516 INFO L413 NwaCegarLoop]: 4064 mSDtfsCounter, 180 mSDsluCounter, 12246 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 16310 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:38,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 16310 Invalid, 110 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:42:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2023-11-06 22:42:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 5532. [2023-11-06 22:42:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5532 states, 3872 states have (on average 1.346849173553719) internal successors, (5215), 3958 states have internal predecessors, (5215), 1414 states have call successors, (1414), 244 states have call predecessors, (1414), 245 states have return successors, (1415), 1384 states have call predecessors, (1415), 1413 states have call successors, (1415) [2023-11-06 22:42:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5532 states to 5532 states and 8044 transitions. [2023-11-06 22:42:38,792 INFO L78 Accepts]: Start accepts. Automaton has 5532 states and 8044 transitions. Word has length 461 [2023-11-06 22:42:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:38,793 INFO L495 AbstractCegarLoop]: Abstraction has 5532 states and 8044 transitions. [2023-11-06 22:42:38,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-06 22:42:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 5532 states and 8044 transitions. [2023-11-06 22:42:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2023-11-06 22:42:38,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:38,815 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:38,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:39,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:42:39,032 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:39,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 509615600, now seen corresponding path program 1 times [2023-11-06 22:42:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:39,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114854240] [2023-11-06 22:42:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:39,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:39,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114854240] [2023-11-06 22:42:39,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:39,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403882787] [2023-11-06 22:42:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:39,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:39,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:42:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:41,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 4807 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:42:41,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 30 proven. 190 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2023-11-06 22:42:41,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2023-11-06 22:42:42,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403882787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:42,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:42:42,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-06 22:42:42,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467363271] [2023-11-06 22:42:42,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:42,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:42:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:42:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:42:42,275 INFO L87 Difference]: Start difference. First operand 5532 states and 8044 transitions. Second operand has 24 states, 24 states have (on average 15.416666666666666) internal successors, (370), 24 states have internal predecessors, (370), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-06 22:42:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:43,245 INFO L93 Difference]: Finished difference Result 11397 states and 16589 transitions. [2023-11-06 22:42:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:42:43,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 15.416666666666666) internal successors, (370), 24 states have internal predecessors, (370), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) Word has length 483 [2023-11-06 22:42:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:43,297 INFO L225 Difference]: With dead ends: 11397 [2023-11-06 22:42:43,298 INFO L226 Difference]: Without dead ends: 5892 [2023-11-06 22:42:43,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:42:43,333 INFO L413 NwaCegarLoop]: 4064 mSDtfsCounter, 287 mSDsluCounter, 20571 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 24635 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:43,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 24635 Invalid, 250 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:42:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2023-11-06 22:42:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5892. [2023-11-06 22:42:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5892 states, 4136 states have (on average 1.3363152804642167) internal successors, (5527), 4222 states have internal predecessors, (5527), 1510 states have call successors, (1510), 244 states have call predecessors, (1510), 245 states have return successors, (1511), 1480 states have call predecessors, (1511), 1509 states have call successors, (1511) [2023-11-06 22:42:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5892 states to 5892 states and 8548 transitions. [2023-11-06 22:42:43,651 INFO L78 Accepts]: Start accepts. Automaton has 5892 states and 8548 transitions. Word has length 483 [2023-11-06 22:42:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:43,652 INFO L495 AbstractCegarLoop]: Abstraction has 5892 states and 8548 transitions. [2023-11-06 22:42:43,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 15.416666666666666) internal successors, (370), 24 states have internal predecessors, (370), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-06 22:42:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5892 states and 8548 transitions. [2023-11-06 22:42:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-11-06 22:42:43,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:43,681 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:43,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:43,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:42:43,896 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:43,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:43,897 INFO L85 PathProgramCache]: Analyzing trace with hash 92954294, now seen corresponding path program 1 times [2023-11-06 22:42:43,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:43,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501969394] [2023-11-06 22:42:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:43,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:44,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:42:44,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904437545] [2023-11-06 22:42:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:44,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:44,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:44,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:42:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:46,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 4555 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:42:46,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-06 22:42:46,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:46,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501969394] [2023-11-06 22:42:46,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:42:46,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904437545] [2023-11-06 22:42:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904437545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:46,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:46,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:42:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215625176] [2023-11-06 22:42:46,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:46,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:46,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:46,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:46,097 INFO L87 Difference]: Start difference. First operand 5892 states and 8548 transitions. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-06 22:42:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:46,489 INFO L93 Difference]: Finished difference Result 11897 states and 17326 transitions. [2023-11-06 22:42:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:46,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) Word has length 412 [2023-11-06 22:42:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:46,533 INFO L225 Difference]: With dead ends: 11897 [2023-11-06 22:42:46,533 INFO L226 Difference]: Without dead ends: 6032 [2023-11-06 22:42:46,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:46,563 INFO L413 NwaCegarLoop]: 4101 mSDtfsCounter, 55 mSDsluCounter, 12274 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 16375 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:46,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 16375 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6032 states. [2023-11-06 22:42:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6032 to 5900. [2023-11-06 22:42:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5900 states, 4142 states have (on average 1.3358281023660068) internal successors, (5533), 4228 states have internal predecessors, (5533), 1510 states have call successors, (1510), 244 states have call predecessors, (1510), 247 states have return successors, (1515), 1482 states have call predecessors, (1515), 1509 states have call successors, (1515) [2023-11-06 22:42:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5900 states to 5900 states and 8558 transitions. [2023-11-06 22:42:46,863 INFO L78 Accepts]: Start accepts. Automaton has 5900 states and 8558 transitions. Word has length 412 [2023-11-06 22:42:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:46,864 INFO L495 AbstractCegarLoop]: Abstraction has 5900 states and 8558 transitions. [2023-11-06 22:42:46,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-06 22:42:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5900 states and 8558 transitions. [2023-11-06 22:42:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2023-11-06 22:42:46,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:46,891 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:46,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:47,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:42:47,104 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:47,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:47,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2084438055, now seen corresponding path program 1 times [2023-11-06 22:42:47,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:47,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295094554] [2023-11-06 22:42:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:47,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:47,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295094554] [2023-11-06 22:42:47,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:47,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887458741] [2023-11-06 22:42:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:47,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:47,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:47,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:42:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:49,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 4567 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:42:49,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-11-06 22:42:49,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:49,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887458741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:49,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:42:49,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158134166] [2023-11-06 22:42:49,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:49,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:49,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:49,453 INFO L87 Difference]: Start difference. First operand 5900 states and 8558 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-11-06 22:42:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:49,746 INFO L93 Difference]: Finished difference Result 11859 states and 17258 transitions. [2023-11-06 22:42:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:49,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 422 [2023-11-06 22:42:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:49,789 INFO L225 Difference]: With dead ends: 11859 [2023-11-06 22:42:49,789 INFO L226 Difference]: Without dead ends: 5986 [2023-11-06 22:42:49,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:49,821 INFO L413 NwaCegarLoop]: 4065 mSDtfsCounter, 33 mSDsluCounter, 8122 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 12187 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:49,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 12187 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:42:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2023-11-06 22:42:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 5936. [2023-11-06 22:42:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5936 states, 4172 states have (on average 1.3362895493767977) internal successors, (5575), 4258 states have internal predecessors, (5575), 1516 states have call successors, (1516), 244 states have call predecessors, (1516), 247 states have return successors, (1521), 1488 states have call predecessors, (1521), 1515 states have call successors, (1521) [2023-11-06 22:42:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 8612 transitions. [2023-11-06 22:42:50,270 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 8612 transitions. Word has length 422 [2023-11-06 22:42:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:50,271 INFO L495 AbstractCegarLoop]: Abstraction has 5936 states and 8612 transitions. [2023-11-06 22:42:50,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-11-06 22:42:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 8612 transitions. [2023-11-06 22:42:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2023-11-06 22:42:50,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:50,291 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:50,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:50,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:42:50,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:50,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:50,505 INFO L85 PathProgramCache]: Analyzing trace with hash -302689380, now seen corresponding path program 1 times [2023-11-06 22:42:50,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:50,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691117971] [2023-11-06 22:42:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:50,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691117971] [2023-11-06 22:42:50,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391619712] [2023-11-06 22:42:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:50,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:50,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:50,923 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:50,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:42:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:52,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 5298 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:42:52,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 27 proven. 946 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-11-06 22:42:53,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-06 22:42:54,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391619712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:54,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:42:54,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-11-06 22:42:54,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951925553] [2023-11-06 22:42:54,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 22:42:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 22:42:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 22:42:54,795 INFO L87 Difference]: Start difference. First operand 5936 states and 8612 transitions. Second operand has 48 states, 48 states have (on average 10.645833333333334) internal successors, (511), 48 states have internal predecessors, (511), 2 states have call successors, (127), 2 states have call predecessors, (127), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-06 22:42:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:56,478 INFO L93 Difference]: Finished difference Result 12565 states and 18253 transitions. [2023-11-06 22:42:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:42:56,479 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 10.645833333333334) internal successors, (511), 48 states have internal predecessors, (511), 2 states have call successors, (127), 2 states have call predecessors, (127), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 621 [2023-11-06 22:42:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:56,529 INFO L225 Difference]: With dead ends: 12565 [2023-11-06 22:42:56,529 INFO L226 Difference]: Without dead ends: 6656 [2023-11-06 22:42:56,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1194 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 22:42:56,561 INFO L413 NwaCegarLoop]: 4064 mSDtfsCounter, 710 mSDsluCounter, 29052 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 33116 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:56,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 33116 Invalid, 561 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:42:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2023-11-06 22:42:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 6656. [2023-11-06 22:42:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 4700 states have (on average 1.318936170212766) internal successors, (6199), 4786 states have internal predecessors, (6199), 1708 states have call successors, (1708), 244 states have call predecessors, (1708), 247 states have return successors, (1713), 1680 states have call predecessors, (1713), 1707 states have call successors, (1713) [2023-11-06 22:42:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 9620 transitions. [2023-11-06 22:42:56,893 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 9620 transitions. Word has length 621 [2023-11-06 22:42:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:56,894 INFO L495 AbstractCegarLoop]: Abstraction has 6656 states and 9620 transitions. [2023-11-06 22:42:56,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 10.645833333333334) internal successors, (511), 48 states have internal predecessors, (511), 2 states have call successors, (127), 2 states have call predecessors, (127), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2023-11-06 22:42:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 9620 transitions. [2023-11-06 22:42:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-06 22:42:56,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:56,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 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 22:42:56,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:42:57,134 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:57,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash -885477344, now seen corresponding path program 1 times [2023-11-06 22:42:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:57,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287832196] [2023-11-06 22:42:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:57,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:57,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:57,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287832196] [2023-11-06 22:42:57,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:42:57,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287359266] [2023-11-06 22:42:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:57,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:57,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:57,532 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:57,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:42:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:59,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 4659 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:42:59,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2023-11-06 22:42:59,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-06 22:43:00,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287359266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:00,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:00,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:43:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526202380] [2023-11-06 22:43:00,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:00,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:43:00,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:43:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:43:00,210 INFO L87 Difference]: Start difference. First operand 6656 states and 9620 transitions. Second operand has 8 states, 8 states have (on average 33.625) internal successors, (269), 8 states have internal predecessors, (269), 6 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (81), 6 states have call predecessors, (81), 6 states have call successors, (81) [2023-11-06 22:43:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:00,738 INFO L93 Difference]: Finished difference Result 13469 states and 19534 transitions. [2023-11-06 22:43:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:43:00,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 33.625) internal successors, (269), 8 states have internal predecessors, (269), 6 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (81), 6 states have call predecessors, (81), 6 states have call successors, (81) Word has length 450 [2023-11-06 22:43:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:00,793 INFO L225 Difference]: With dead ends: 13469 [2023-11-06 22:43:00,794 INFO L226 Difference]: Without dead ends: 6840 [2023-11-06 22:43:00,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:43:00,840 INFO L413 NwaCegarLoop]: 4065 mSDtfsCounter, 111 mSDsluCounter, 16258 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 20323 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:00,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 20323 Invalid, 41 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:43:00,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2023-11-06 22:43:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 6800. [2023-11-06 22:43:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6800 states, 4820 states have (on average 1.320954356846473) internal successors, (6367), 4906 states have internal predecessors, (6367), 1732 states have call successors, (1732), 244 states have call predecessors, (1732), 247 states have return successors, (1737), 1704 states have call predecessors, (1737), 1731 states have call successors, (1737) [2023-11-06 22:43:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 9836 transitions. [2023-11-06 22:43:01,224 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 9836 transitions. Word has length 450 [2023-11-06 22:43:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:01,226 INFO L495 AbstractCegarLoop]: Abstraction has 6800 states and 9836 transitions. [2023-11-06 22:43:01,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.625) internal successors, (269), 8 states have internal predecessors, (269), 6 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (81), 6 states have call predecessors, (81), 6 states have call successors, (81) [2023-11-06 22:43:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 9836 transitions. [2023-11-06 22:43:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-06 22:43:01,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:01,251 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:01,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:43:01,471 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:01,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1535017730, now seen corresponding path program 1 times [2023-11-06 22:43:01,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:01,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338526728] [2023-11-06 22:43:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:01,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:01,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:01,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338526728] [2023-11-06 22:43:01,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:01,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751853247] [2023-11-06 22:43:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:01,856 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:01,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:43:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:03,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 4861 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:43:03,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-06 22:43:03,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751853247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:03,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:03,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045121653] [2023-11-06 22:43:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:03,986 INFO L87 Difference]: Start difference. First operand 6800 states and 9836 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 3 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2023-11-06 22:43:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:04,308 INFO L93 Difference]: Finished difference Result 13625 states and 19761 transitions. [2023-11-06 22:43:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:04,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 3 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) Word has length 480 [2023-11-06 22:43:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:04,355 INFO L225 Difference]: With dead ends: 13625 [2023-11-06 22:43:04,355 INFO L226 Difference]: Without dead ends: 6852 [2023-11-06 22:43:04,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 22:43:04,486 INFO L413 NwaCegarLoop]: 4063 mSDtfsCounter, 15 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8116 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:04,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8116 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:43:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6852 states. [2023-11-06 22:43:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6852 to 6836. [2023-11-06 22:43:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 4846 states have (on average 1.3221213371853076) internal successors, (6407), 4934 states have internal predecessors, (6407), 1742 states have call successors, (1742), 244 states have call predecessors, (1742), 247 states have return successors, (1747), 1714 states have call predecessors, (1747), 1741 states have call successors, (1747) [2023-11-06 22:43:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 9896 transitions. [2023-11-06 22:43:04,828 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 9896 transitions. Word has length 480 [2023-11-06 22:43:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:04,829 INFO L495 AbstractCegarLoop]: Abstraction has 6836 states and 9896 transitions. [2023-11-06 22:43:04,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 3 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2023-11-06 22:43:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 9896 transitions. [2023-11-06 22:43:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-06 22:43:04,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:04,855 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:04,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:05,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:43:05,068 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:05,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1160800508, now seen corresponding path program 1 times [2023-11-06 22:43:05,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:05,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455770086] [2023-11-06 22:43:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:05,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:05,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:05,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455770086] [2023-11-06 22:43:05,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:05,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6333274] [2023-11-06 22:43:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:05,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:05,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:05,461 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:05,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:43:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:07,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 4858 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:07,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-11-06 22:43:07,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2023-11-06 22:43:08,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6333274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:08,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:08,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-06 22:43:08,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225878249] [2023-11-06 22:43:08,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:08,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:08,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:08,077 INFO L87 Difference]: Start difference. First operand 6836 states and 9896 transitions. Second operand has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 4 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-06 22:43:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:08,362 INFO L93 Difference]: Finished difference Result 13669 states and 19842 transitions. [2023-11-06 22:43:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:43:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 4 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 480 [2023-11-06 22:43:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:08,410 INFO L225 Difference]: With dead ends: 13669 [2023-11-06 22:43:08,411 INFO L226 Difference]: Without dead ends: 6860 [2023-11-06 22:43:08,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:08,448 INFO L413 NwaCegarLoop]: 4065 mSDtfsCounter, 4 mSDsluCounter, 8125 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12190 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:08,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12190 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:43:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6860 states. [2023-11-06 22:43:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6860 to 6860. [2023-11-06 22:43:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6860 states, 4864 states have (on average 1.3209292763157894) internal successors, (6425), 4952 states have internal predecessors, (6425), 1748 states have call successors, (1748), 244 states have call predecessors, (1748), 247 states have return successors, (1753), 1720 states have call predecessors, (1753), 1747 states have call successors, (1753) [2023-11-06 22:43:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6860 states to 6860 states and 9926 transitions. [2023-11-06 22:43:08,821 INFO L78 Accepts]: Start accepts. Automaton has 6860 states and 9926 transitions. Word has length 480 [2023-11-06 22:43:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:08,822 INFO L495 AbstractCegarLoop]: Abstraction has 6860 states and 9926 transitions. [2023-11-06 22:43:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 4 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-06 22:43:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6860 states and 9926 transitions. [2023-11-06 22:43:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-06 22:43:08,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:08,846 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:08,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:09,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:43:09,069 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:09,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 396680883, now seen corresponding path program 2 times [2023-11-06 22:43:09,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:09,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876430032] [2023-11-06 22:43:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:09,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876430032] [2023-11-06 22:43:09,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087997527] [2023-11-06 22:43:09,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:09,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:09,696 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:09,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:43:11,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:43:11,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:11,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:11,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-11-06 22:43:11,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087997527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:11,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:43:11,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267593254] [2023-11-06 22:43:11,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:11,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:43:11,300 INFO L87 Difference]: Start difference. First operand 6860 states and 9926 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:43:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:11,622 INFO L93 Difference]: Finished difference Result 14339 states and 20872 transitions. [2023-11-06 22:43:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:43:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 501 [2023-11-06 22:43:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:11,666 INFO L225 Difference]: With dead ends: 14339 [2023-11-06 22:43:11,666 INFO L226 Difference]: Without dead ends: 7506 [2023-11-06 22:43:11,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 498 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 22:43:11,699 INFO L413 NwaCegarLoop]: 4569 mSDtfsCounter, 279 mSDsluCounter, 8737 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 13306 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:11,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 13306 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:43:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7506 states. [2023-11-06 22:43:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7506 to 6864. [2023-11-06 22:43:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 4868 states have (on average 1.3206655710764175) internal successors, (6429), 4956 states have internal predecessors, (6429), 1748 states have call successors, (1748), 244 states have call predecessors, (1748), 247 states have return successors, (1753), 1720 states have call predecessors, (1753), 1747 states have call successors, (1753) [2023-11-06 22:43:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 9930 transitions. [2023-11-06 22:43:12,036 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 9930 transitions. Word has length 501 [2023-11-06 22:43:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:12,037 INFO L495 AbstractCegarLoop]: Abstraction has 6864 states and 9930 transitions. [2023-11-06 22:43:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:43:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 9930 transitions. [2023-11-06 22:43:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-06 22:43:12,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:12,056 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:12,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:43:12,268 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:12,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1509882187, now seen corresponding path program 1 times [2023-11-06 22:43:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606481142] [2023-11-06 22:43:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:12,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:12,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606481142] [2023-11-06 22:43:12,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:12,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067032004] [2023-11-06 22:43:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:12,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:12,628 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:12,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:43:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:14,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 5004 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:43:14,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-06 22:43:14,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-11-06 22:43:15,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067032004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:15,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:15,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:43:15,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342402697] [2023-11-06 22:43:15,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:43:15,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:43:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:15,452 INFO L87 Difference]: Start difference. First operand 6864 states and 9930 transitions. Second operand has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 10 states have call successors, (89), 2 states have call predecessors, (89), 2 states have return successors, (83), 10 states have call predecessors, (83), 10 states have call successors, (83) [2023-11-06 22:43:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:15,870 INFO L93 Difference]: Finished difference Result 13749 states and 19946 transitions. [2023-11-06 22:43:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:43:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 10 states have call successors, (89), 2 states have call predecessors, (89), 2 states have return successors, (83), 10 states have call predecessors, (83), 10 states have call successors, (83) Word has length 502 [2023-11-06 22:43:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:15,901 INFO L225 Difference]: With dead ends: 13749 [2023-11-06 22:43:15,902 INFO L226 Difference]: Without dead ends: 6912 [2023-11-06 22:43:15,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 992 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:15,926 INFO L413 NwaCegarLoop]: 4065 mSDtfsCounter, 4 mSDsluCounter, 16253 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20318 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:15,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20318 Invalid, 36 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:43:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6912 states. [2023-11-06 22:43:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6912 to 6912. [2023-11-06 22:43:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6912 states, 4904 states have (on average 1.3183115823817293) internal successors, (6465), 4992 states have internal predecessors, (6465), 1760 states have call successors, (1760), 244 states have call predecessors, (1760), 247 states have return successors, (1765), 1732 states have call predecessors, (1765), 1759 states have call successors, (1765) [2023-11-06 22:43:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6912 states to 6912 states and 9990 transitions. [2023-11-06 22:43:16,298 INFO L78 Accepts]: Start accepts. Automaton has 6912 states and 9990 transitions. Word has length 502 [2023-11-06 22:43:16,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:16,299 INFO L495 AbstractCegarLoop]: Abstraction has 6912 states and 9990 transitions. [2023-11-06 22:43:16,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.5) internal successors, (258), 12 states have internal predecessors, (258), 10 states have call successors, (89), 2 states have call predecessors, (89), 2 states have return successors, (83), 10 states have call predecessors, (83), 10 states have call successors, (83) [2023-11-06 22:43:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6912 states and 9990 transitions. [2023-11-06 22:43:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-06 22:43:16,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:16,325 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:16,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:16,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:43:16,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:16,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1621151211, now seen corresponding path program 2 times [2023-11-06 22:43:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:16,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745517956] [2023-11-06 22:43:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:16,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745517956] [2023-11-06 22:43:17,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228923184] [2023-11-06 22:43:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:17,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:17,004 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:17,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:43:18,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:43:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:18,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 2545 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:18,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2023-11-06 22:43:18,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:18,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228923184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:18,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:18,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:18,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390117313] [2023-11-06 22:43:18,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:18,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:18,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:18,747 INFO L87 Difference]: Start difference. First operand 6912 states and 9990 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:43:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:19,536 INFO L93 Difference]: Finished difference Result 20636 states and 29881 transitions. [2023-11-06 22:43:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 544 [2023-11-06 22:43:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:19,646 INFO L225 Difference]: With dead ends: 20636 [2023-11-06 22:43:19,646 INFO L226 Difference]: Without dead ends: 13751 [2023-11-06 22:43:19,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 542 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 22:43:19,693 INFO L413 NwaCegarLoop]: 4078 mSDtfsCounter, 4015 mSDsluCounter, 4026 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4015 SdHoareTripleChecker+Valid, 8104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:19,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4015 Valid, 8104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:43:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13751 states. [2023-11-06 22:43:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13751 to 13748. [2023-11-06 22:43:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13748 states, 9754 states have (on average 1.3188435513635433) internal successors, (12864), 9935 states have internal predecessors, (12864), 3505 states have call successors, (3505), 486 states have call predecessors, (3505), 488 states have return successors, (3524), 3440 states have call predecessors, (3524), 3504 states have call successors, (3524) [2023-11-06 22:43:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 19893 transitions. [2023-11-06 22:43:20,616 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 19893 transitions. Word has length 544 [2023-11-06 22:43:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:20,616 INFO L495 AbstractCegarLoop]: Abstraction has 13748 states and 19893 transitions. [2023-11-06 22:43:20,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:43:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 19893 transitions. [2023-11-06 22:43:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-11-06 22:43:20,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:20,661 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:20,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:43:20,875 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:20,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1750559401, now seen corresponding path program 1 times [2023-11-06 22:43:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:20,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148900714] [2023-11-06 22:43:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:20,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148900714] [2023-11-06 22:43:21,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643891009] [2023-11-06 22:43:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:21,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:21,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:43:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:23,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 5234 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:43:23,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-11-06 22:43:23,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2023-11-06 22:43:24,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643891009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:24,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:24,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-06 22:43:24,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867456341] [2023-11-06 22:43:24,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:24,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:43:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:43:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:43:24,618 INFO L87 Difference]: Start difference. First operand 13748 states and 19893 transitions. Second operand has 24 states, 24 states have (on average 12.291666666666666) internal successors, (295), 24 states have internal predecessors, (295), 22 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (95), 22 states have call predecessors, (95), 22 states have call successors, (95) [2023-11-06 22:43:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:25,458 INFO L93 Difference]: Finished difference Result 27661 states and 40134 transitions. [2023-11-06 22:43:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:43:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 12.291666666666666) internal successors, (295), 24 states have internal predecessors, (295), 22 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (95), 22 states have call predecessors, (95), 22 states have call successors, (95) Word has length 545 [2023-11-06 22:43:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:25,543 INFO L225 Difference]: With dead ends: 27661 [2023-11-06 22:43:25,543 INFO L226 Difference]: Without dead ends: 13940 [2023-11-06 22:43:25,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:43:25,598 INFO L413 NwaCegarLoop]: 4065 mSDtfsCounter, 4 mSDsluCounter, 20326 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24391 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:25,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24391 Invalid, 73 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:43:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13940 states. [2023-11-06 22:43:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13940 to 13940. [2023-11-06 22:43:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13940 states, 9898 states have (on average 1.3142048898767427) internal successors, (13008), 10079 states have internal predecessors, (13008), 3553 states have call successors, (3553), 486 states have call predecessors, (3553), 488 states have return successors, (3572), 3488 states have call predecessors, (3572), 3552 states have call successors, (3572) [2023-11-06 22:43:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13940 states to 13940 states and 20133 transitions. [2023-11-06 22:43:26,615 INFO L78 Accepts]: Start accepts. Automaton has 13940 states and 20133 transitions. Word has length 545 [2023-11-06 22:43:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:26,616 INFO L495 AbstractCegarLoop]: Abstraction has 13940 states and 20133 transitions. [2023-11-06 22:43:26,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.291666666666666) internal successors, (295), 24 states have internal predecessors, (295), 22 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (95), 22 states have call predecessors, (95), 22 states have call successors, (95) [2023-11-06 22:43:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 13940 states and 20133 transitions. [2023-11-06 22:43:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 22:43:26,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:26,673 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 22, 22, 22, 22, 22, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:26,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:26,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:26,888 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:26,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:26,889 INFO L85 PathProgramCache]: Analyzing trace with hash 367454825, now seen corresponding path program 1 times [2023-11-06 22:43:26,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:26,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926063703] [2023-11-06 22:43:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:26,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926063703] [2023-11-06 22:43:27,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745559994] [2023-11-06 22:43:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:27,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:27,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:27,417 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:27,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:43:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:29,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 6105 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:43:29,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6183 backedges. 30 proven. 4186 refuted. 0 times theorem prover too weak. 1967 trivial. 0 not checked. [2023-11-06 22:43:31,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6183 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2023-11-06 22:43:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745559994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:35,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:35,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2023-11-06 22:43:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987370686] [2023-11-06 22:43:35,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:35,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-06 22:43:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:35,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-06 22:43:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2023-11-06 22:43:35,793 INFO L87 Difference]: Start difference. First operand 13940 states and 20133 transitions. Second operand has 96 states, 96 states have (on average 6.864583333333333) internal successors, (659), 96 states have internal predecessors, (659), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-06 22:43:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:41,843 INFO L93 Difference]: Finished difference Result 30733 states and 44471 transitions. [2023-11-06 22:43:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-06 22:43:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 6.864583333333333) internal successors, (659), 96 states have internal predecessors, (659), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) Word has length 775 [2023-11-06 22:43:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:41,907 INFO L225 Difference]: With dead ends: 30733 [2023-11-06 22:43:41,907 INFO L226 Difference]: Without dead ends: 16820 [2023-11-06 22:43:42,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 1454 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2023-11-06 22:43:42,075 INFO L413 NwaCegarLoop]: 4064 mSDtfsCounter, 1558 mSDsluCounter, 25660 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 29724 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:42,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1934 Valid, 29724 Invalid, 1117 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [226 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:43:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2023-11-06 22:43:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 16820. [2023-11-06 22:43:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16820 states, 12010 states have (on average 1.2909242298084929) internal successors, (15504), 12191 states have internal predecessors, (15504), 4321 states have call successors, (4321), 486 states have call predecessors, (4321), 488 states have return successors, (4340), 4256 states have call predecessors, (4340), 4320 states have call successors, (4340) [2023-11-06 22:43:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16820 states to 16820 states and 24165 transitions. [2023-11-06 22:43:42,898 INFO L78 Accepts]: Start accepts. Automaton has 16820 states and 24165 transitions. Word has length 775 [2023-11-06 22:43:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:42,899 INFO L495 AbstractCegarLoop]: Abstraction has 16820 states and 24165 transitions. [2023-11-06 22:43:42,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 6.864583333333333) internal successors, (659), 96 states have internal predecessors, (659), 2 states have call successors, (107), 2 states have call predecessors, (107), 2 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-06 22:43:42,900 INFO L276 IsEmpty]: Start isEmpty. Operand 16820 states and 24165 transitions. [2023-11-06 22:43:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2023-11-06 22:43:42,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:42,958 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:42,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:43,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:43,181 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:43,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1080584041, now seen corresponding path program 2 times [2023-11-06 22:43:43,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:43,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284051222] [2023-11-06 22:43:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:43,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284051222] [2023-11-06 22:43:43,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643010298] [2023-11-06 22:43:43,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:43,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:43,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:43,663 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:43,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:43:45,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:43:45,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:45,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:45,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2011 trivial. 0 not checked. [2023-11-06 22:43:45,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:45,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643010298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:45,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:45,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315599044] [2023-11-06 22:43:45,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:45,738 INFO L87 Difference]: Start difference. First operand 16820 states and 24165 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:43:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:46,642 INFO L93 Difference]: Finished difference Result 42018 states and 60410 transitions. [2023-11-06 22:43:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 629 [2023-11-06 22:43:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:46,780 INFO L225 Difference]: With dead ends: 42018 [2023-11-06 22:43:46,780 INFO L226 Difference]: Without dead ends: 25225 [2023-11-06 22:43:46,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 627 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 22:43:46,855 INFO L413 NwaCegarLoop]: 4061 mSDtfsCounter, 4041 mSDsluCounter, 4024 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4041 SdHoareTripleChecker+Valid, 8085 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:46,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4041 Valid, 8085 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:43:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25225 states. [2023-11-06 22:43:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25225 to 25222. [2023-11-06 22:43:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25222 states, 18014 states have (on average 1.2904962806705895) internal successors, (23247), 18283 states have internal predecessors, (23247), 6473 states have call successors, (6473), 728 states have call predecessors, (6473), 734 states have return successors, (6516), 6381 states have call predecessors, (6516), 6472 states have call successors, (6516) [2023-11-06 22:43:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25222 states to 25222 states and 36236 transitions. [2023-11-06 22:43:48,343 INFO L78 Accepts]: Start accepts. Automaton has 25222 states and 36236 transitions. Word has length 629 [2023-11-06 22:43:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:48,344 INFO L495 AbstractCegarLoop]: Abstraction has 25222 states and 36236 transitions. [2023-11-06 22:43:48,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:43:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 25222 states and 36236 transitions. [2023-11-06 22:43:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2023-11-06 22:43:48,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:48,561 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:48,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:48,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:48,775 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:48,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1855598882, now seen corresponding path program 1 times [2023-11-06 22:43:48,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:48,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019607469] [2023-11-06 22:43:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:48,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:49,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:49,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019607469] [2023-11-06 22:43:49,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:49,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597650435] [2023-11-06 22:43:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:49,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:49,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:49,224 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:49,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:43:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:51,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 5692 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:43:51,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 12 proven. 946 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2023-11-06 22:43:52,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1065 trivial. 0 not checked. [2023-11-06 22:43:53,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597650435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:53,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:53,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-11-06 22:43:53,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040322298] [2023-11-06 22:43:53,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:53,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 22:43:53,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:53,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 22:43:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 22:43:53,650 INFO L87 Difference]: Start difference. First operand 25222 states and 36236 transitions. Second operand has 48 states, 48 states have (on average 7.666666666666667) internal successors, (368), 48 states have internal predecessors, (368), 46 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (119), 46 states have call predecessors, (119), 46 states have call successors, (119) [2023-11-06 22:43:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:43:55,777 INFO L93 Difference]: Finished difference Result 50993 states and 73439 transitions. [2023-11-06 22:43:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:43:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 7.666666666666667) internal successors, (368), 48 states have internal predecessors, (368), 46 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (119), 46 states have call predecessors, (119), 46 states have call successors, (119) Word has length 630 [2023-11-06 22:43:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:43:55,956 INFO L225 Difference]: With dead ends: 50993 [2023-11-06 22:43:55,956 INFO L226 Difference]: Without dead ends: 25798 [2023-11-06 22:43:56,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1212 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 22:43:56,234 INFO L413 NwaCegarLoop]: 4065 mSDtfsCounter, 4 mSDsluCounter, 20350 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24415 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:43:56,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24415 Invalid, 145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:43:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25798 states. [2023-11-06 22:43:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25798 to 25798. [2023-11-06 22:43:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25798 states, 18446 states have (on average 1.2836929415591456) internal successors, (23679), 18715 states have internal predecessors, (23679), 6617 states have call successors, (6617), 728 states have call predecessors, (6617), 734 states have return successors, (6660), 6525 states have call predecessors, (6660), 6616 states have call successors, (6660) [2023-11-06 22:43:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25798 states to 25798 states and 36956 transitions. [2023-11-06 22:43:57,535 INFO L78 Accepts]: Start accepts. Automaton has 25798 states and 36956 transitions. Word has length 630 [2023-11-06 22:43:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:43:57,537 INFO L495 AbstractCegarLoop]: Abstraction has 25798 states and 36956 transitions. [2023-11-06 22:43:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 7.666666666666667) internal successors, (368), 48 states have internal predecessors, (368), 46 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (119), 46 states have call predecessors, (119), 46 states have call successors, (119) [2023-11-06 22:43:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 25798 states and 36956 transitions. [2023-11-06 22:43:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-11-06 22:43:57,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:43:57,589 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:57,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 22:43:57,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:57,805 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:43:57,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 294130836, now seen corresponding path program 1 times [2023-11-06 22:43:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:57,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766811568] [2023-11-06 22:43:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:57,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:58,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766811568] [2023-11-06 22:43:58,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:43:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055174082] [2023-11-06 22:43:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:58,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:58,429 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:58,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:44:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:01,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 6034 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:44:01,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-11-06 22:44:01,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055174082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:44:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735792615] [2023-11-06 22:44:01,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:01,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:01,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:01,466 INFO L87 Difference]: Start difference. First operand 25798 states and 36956 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-06 22:44:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:44:03,766 INFO L93 Difference]: Finished difference Result 75115 states and 107625 transitions. [2023-11-06 22:44:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:44:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 584 [2023-11-06 22:44:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:44:04,209 INFO L225 Difference]: With dead ends: 75115 [2023-11-06 22:44:04,209 INFO L226 Difference]: Without dead ends: 49344 [2023-11-06 22:44:04,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 582 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 22:44:04,341 INFO L413 NwaCegarLoop]: 5336 mSDtfsCounter, 3419 mSDsluCounter, 4020 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 9356 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:44:04,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3419 Valid, 9356 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:44:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49344 states. [2023-11-06 22:44:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49344 to 49335. [2023-11-06 22:44:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49335 states, 35254 states have (on average 1.2814716060588869) internal successors, (45177), 35735 states have internal predecessors, (45177), 12707 states have call successors, (12707), 1360 states have call predecessors, (12707), 1373 states have return successors, (12794), 12557 states have call predecessors, (12794), 12706 states have call successors, (12794) [2023-11-06 22:44:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49335 states to 49335 states and 70678 transitions. [2023-11-06 22:44:07,493 INFO L78 Accepts]: Start accepts. Automaton has 49335 states and 70678 transitions. Word has length 584 [2023-11-06 22:44:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:44:07,494 INFO L495 AbstractCegarLoop]: Abstraction has 49335 states and 70678 transitions. [2023-11-06 22:44:07,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-06 22:44:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 49335 states and 70678 transitions. [2023-11-06 22:44:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-11-06 22:44:07,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:44:07,897 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:07,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:08,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:08,120 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:44:08,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2083174892, now seen corresponding path program 1 times [2023-11-06 22:44:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057617278] [2023-11-06 22:44:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:08,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:08,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057617278] [2023-11-06 22:44:08,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:44:08,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415927614] [2023-11-06 22:44:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:08,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:08,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:08,524 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:08,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:44:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:11,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 6208 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:44:11,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-11-06 22:44:11,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:11,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415927614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:11,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:11,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:44:11,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479723685] [2023-11-06 22:44:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:11,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:11,341 INFO L87 Difference]: Start difference. First operand 49335 states and 70678 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 3 states have call successors, (79), 3 states have call predecessors, (79), 3 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2023-11-06 22:44:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:44:15,292 INFO L93 Difference]: Finished difference Result 122793 states and 175975 transitions. [2023-11-06 22:44:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:44:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 3 states have call successors, (79), 3 states have call predecessors, (79), 3 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) Word has length 619 [2023-11-06 22:44:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:44:15,905 INFO L225 Difference]: With dead ends: 122793 [2023-11-06 22:44:15,906 INFO L226 Difference]: Without dead ends: 73495 [2023-11-06 22:44:16,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 617 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 22:44:16,105 INFO L413 NwaCegarLoop]: 4935 mSDtfsCounter, 3677 mSDsluCounter, 3776 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3677 SdHoareTripleChecker+Valid, 8711 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:44:16,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3677 Valid, 8711 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:44:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73495 states. [2023-11-06 22:44:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73495 to 73393. [2023-11-06 22:44:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73393 states, 52480 states have (on average 1.281764481707317) internal successors, (67267), 53197 states have internal predecessors, (67267), 18873 states have call successors, (18873), 2020 states have call predecessors, (18873), 2039 states have return successors, (19002), 18643 states have call predecessors, (19002), 18872 states have call successors, (19002) [2023-11-06 22:44:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73393 states to 73393 states and 105142 transitions. [2023-11-06 22:44:21,005 INFO L78 Accepts]: Start accepts. Automaton has 73393 states and 105142 transitions. Word has length 619 [2023-11-06 22:44:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:44:21,006 INFO L495 AbstractCegarLoop]: Abstraction has 73393 states and 105142 transitions. [2023-11-06 22:44:21,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 3 states have call successors, (79), 3 states have call predecessors, (79), 3 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2023-11-06 22:44:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 73393 states and 105142 transitions. [2023-11-06 22:44:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2023-11-06 22:44:21,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:44:21,139 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:21,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-06 22:44:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:44:21,339 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:44:21,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1189837134, now seen corresponding path program 1 times [2023-11-06 22:44:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220156730] [2023-11-06 22:44:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:21,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220156730] [2023-11-06 22:44:21,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:44:21,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281984685] [2023-11-06 22:44:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:21,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:21,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:21,700 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:21,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ddef78-ef3d-40ff-9692-b45edbbe9440/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:44:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:24,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 6251 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:44:24,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2023-11-06 22:44:24,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:24,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281984685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:24,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:24,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:44:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994641260] [2023-11-06 22:44:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:24,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:24,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:24,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:24,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:24,658 INFO L87 Difference]: Start difference. First operand 73393 states and 105142 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2023-11-06 22:44:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:44:28,921 INFO L93 Difference]: Finished difference Result 146758 states and 210248 transitions. [2023-11-06 22:44:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:44:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) Word has length 635 [2023-11-06 22:44:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:44:29,368 INFO L225 Difference]: With dead ends: 146758 [2023-11-06 22:44:29,368 INFO L226 Difference]: Without dead ends: 73393 [2023-11-06 22:44:29,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 633 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 22:44:29,783 INFO L413 NwaCegarLoop]: 4067 mSDtfsCounter, 0 mSDsluCounter, 4062 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8129 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:44:29,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8129 Invalid, 4 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:44:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73393 states.