./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:37:28,179 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:37:28,258 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:37:28,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:37:28,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:37:28,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:37:28,302 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:37:28,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:37:28,304 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:37:28,308 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:37:28,309 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:37:28,309 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:37:28,310 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:37:28,311 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:37:28,312 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:37:28,312 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:37:28,313 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:37:28,313 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:37:28,313 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:37:28,314 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:37:28,314 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:37:28,315 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:37:28,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:37:28,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:37:28,316 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:37:28,317 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:37:28,317 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:37:28,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:37:28,318 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:37:28,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:37:28,319 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:37:28,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:37:28,319 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:37:28,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:37:28,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:28,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:37:28,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:37:28,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:37:28,321 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:37:28,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:37:28,321 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:37:28,322 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:37:28,322 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:37:28,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:37:28,323 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 [2023-11-23 20:37:28,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:37:28,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:37:28,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:37:28,714 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:37:28,714 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:37:28,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2023-11-23 20:37:31,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:37:32,483 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:37:32,484 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2023-11-23 20:37:32,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/data/97459e246/bc71de6d1d8f4279b93c107a8a65c706/FLAGfab973933 [2023-11-23 20:37:32,552 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/data/97459e246/bc71de6d1d8f4279b93c107a8a65c706 [2023-11-23 20:37:32,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:37:32,563 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:37:32,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:32,569 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:37:32,574 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:37:32,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:32" (1/1) ... [2023-11-23 20:37:32,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780c66f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:32, skipping insertion in model container [2023-11-23 20:37:32,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:32" (1/1) ... [2023-11-23 20:37:32,721 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:37:33,243 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-23 20:37:33,244 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2023-11-23 20:37:33,490 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_d3aaae33-accf-4f5b-8809-15341e002813/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2023-11-23 20:37:34,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:34,372 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:37:34,516 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-23 20:37:34,516 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2023-11-23 20:37:34,519 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [3625] [2023-11-23 20:37:34,521 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0": "+m" (v->counter)); [3632] [2023-11-23 20:37:34,522 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0; sete %1": "+m" (v->counter), "=qm" (c): : "memory"); [3640-3641] [2023-11-23 20:37:34,535 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_d3aaae33-accf-4f5b-8809-15341e002813/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2023-11-23 20:37:34,540 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (65), "i" (12UL)); [3856-3857] [2023-11-23 20:37:34,542 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (67), "i" (12UL)); [3864-3865] [2023-11-23 20:37:34,542 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (68), "i" (12UL)); [3872-3873] [2023-11-23 20:37:34,544 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (98), "i" (12UL)); [3899-3900] [2023-11-23 20:37:34,544 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (99), "i" (12UL)); [3907-3908] [2023-11-23 20:37:34,546 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/scatterlist.h"), "i" (115), "i" (12UL)); [3931-3932] [2023-11-23 20:37:34,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:34,868 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:37:34,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34 WrapperNode [2023-11-23 20:37:34,870 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:34,871 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:34,871 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:37:34,871 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:37:34,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,178 INFO L138 Inliner]: procedures = 189, calls = 1841, calls flagged for inlining = 79, calls inlined = 70, statements flattened = 4898 [2023-11-23 20:37:35,179 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:35,180 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:37:35,180 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:37:35,180 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:37:35,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,244 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:37:35,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:37:35,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:37:35,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:37:35,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (1/1) ... [2023-11-23 20:37:35,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:35,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:35,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:37:35,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:37:35,679 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2023-11-23 20:37:35,680 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2023-11-23 20:37:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 20:37:35,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 20:37:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-23 20:37:35,681 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-23 20:37:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-23 20:37:35,681 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-23 20:37:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-23 20:37:35,682 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-23 20:37:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure free_sglist [2023-11-23 20:37:35,682 INFO L138 BoogieDeclarations]: Found implementation of procedure free_sglist [2023-11-23 20:37:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2023-11-23 20:37:35,683 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2023-11-23 20:37:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure test_iso_queue [2023-11-23 20:37:35,683 INFO L138 BoogieDeclarations]: Found implementation of procedure test_iso_queue [2023-11-23 20:37:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure simple_check_buf [2023-11-23 20:37:35,685 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_check_buf [2023-11-23 20:37:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:37:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:37:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:37:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-23 20:37:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-23 20:37:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure perform_sglist [2023-11-23 20:37:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure perform_sglist [2023-11-23 20:37:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure test_unaligned_bulk [2023-11-23 20:37:35,687 INFO L138 BoogieDeclarations]: Found implementation of procedure test_unaligned_bulk [2023-11-23 20:37:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 20:37:35,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 20:37:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_sglist [2023-11-23 20:37:35,687 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_sglist [2023-11-23 20:37:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 20:37:35,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 20:37:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:37:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:37:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2023-11-23 20:37:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2023-11-23 20:37:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 20:37:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 20:37:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 20:37:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 20:37:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 20:37:35,689 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 20:37:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure set_altsetting [2023-11-23 20:37:35,689 INFO L138 BoogieDeclarations]: Found implementation of procedure set_altsetting [2023-11-23 20:37:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-23 20:37:35,689 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-23 20:37:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:37:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 20:37:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 20:37:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-23 20:37:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-23 20:37:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:37:35,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:37:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure verify_not_halted [2023-11-23 20:37:35,692 INFO L138 BoogieDeclarations]: Found implementation of procedure verify_not_halted [2023-11-23 20:37:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2023-11-23 20:37:35,692 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2023-11-23 20:37:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-23 20:37:35,693 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-23 20:37:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:37:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:37:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 20:37:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 20:37:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2023-11-23 20:37:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2023-11-23 20:37:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:37:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:37:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure test_halt [2023-11-23 20:37:35,695 INFO L138 BoogieDeclarations]: Found implementation of procedure test_halt [2023-11-23 20:37:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_alloc_urb [2023-11-23 20:37:35,695 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_alloc_urb [2023-11-23 20:37:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure unlink1 [2023-11-23 20:37:35,696 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink1 [2023-11-23 20:37:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:37:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_out [2023-11-23 20:37:35,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_out [2023-11-23 20:37:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 20:37:35,696 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 20:37:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-23 20:37:35,697 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-23 20:37:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_status [2023-11-23 20:37:35,697 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_status [2023-11-23 20:37:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:37:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure is_good_config [2023-11-23 20:37:35,697 INFO L138 BoogieDeclarations]: Found implementation of procedure is_good_config [2023-11-23 20:37:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2023-11-23 20:37:35,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2023-11-23 20:37:35,698 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-23 20:37:35,698 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-23 20:37:35,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:37:35,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:37:35,698 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2023-11-23 20:37:35,698 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2023-11-23 20:37:35,698 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-23 20:37:35,698 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-23 20:37:35,699 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-23 20:37:35,699 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-23 20:37:35,699 INFO L130 BoogieDeclarations]: Found specification of procedure testdev_to_usbdev [2023-11-23 20:37:35,700 INFO L138 BoogieDeclarations]: Found implementation of procedure testdev_to_usbdev [2023-11-23 20:37:35,700 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-23 20:37:35,700 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-23 20:37:35,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:37:35,701 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_simple [2023-11-23 20:37:35,701 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_simple [2023-11-23 20:37:35,701 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-23 20:37:35,701 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-23 20:37:35,701 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2023-11-23 20:37:35,701 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2023-11-23 20:37:35,702 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-23 20:37:35,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-23 20:37:35,702 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-23 20:37:35,702 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-23 20:37:35,702 INFO L130 BoogieDeclarations]: Found specification of procedure simple_io [2023-11-23 20:37:35,702 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_io [2023-11-23 20:37:35,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:37:35,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:37:35,702 INFO L130 BoogieDeclarations]: Found specification of procedure simple_alloc_urb [2023-11-23 20:37:35,703 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_alloc_urb [2023-11-23 20:37:35,703 INFO L130 BoogieDeclarations]: Found specification of procedure simple_free_urb [2023-11-23 20:37:35,703 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_free_urb [2023-11-23 20:37:35,703 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 20:37:35,703 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 20:37:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure simple_fill_buf [2023-11-23 20:37:35,704 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_fill_buf [2023-11-23 20:37:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure do_gettimeofday [2023-11-23 20:37:35,704 INFO L138 BoogieDeclarations]: Found implementation of procedure do_gettimeofday [2023-11-23 20:37:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 20:37:35,704 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 20:37:35,704 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 20:37:35,705 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 20:37:35,705 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_ioctl [2023-11-23 20:37:35,705 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_ioctl [2023-11-23 20:37:35,705 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_offset [2023-11-23 20:37:35,707 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_offset [2023-11-23 20:37:35,710 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-23 20:37:35,710 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-23 20:37:35,710 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-23 20:37:35,710 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-23 20:37:35,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:37:35,711 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2023-11-23 20:37:35,712 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2023-11-23 20:37:35,712 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_disconnect [2023-11-23 20:37:35,713 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_disconnect [2023-11-23 20:37:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure check_guard_bytes [2023-11-23 20:37:35,718 INFO L138 BoogieDeclarations]: Found implementation of procedure check_guard_bytes [2023-11-23 20:37:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-23 20:37:35,718 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-23 20:37:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-23 20:37:35,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-23 20:37:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 20:37:35,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 20:37:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:37:35,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:37:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_descriptor [2023-11-23 20:37:35,719 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_descriptor [2023-11-23 20:37:36,377 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:37:36,381 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:37:37,058 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:37:40,258 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:41,895 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:41,895 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:37:41,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:41 BoogieIcfgContainer [2023-11-23 20:37:41,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:41,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:41,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:41,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:41,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:32" (1/3) ... [2023-11-23 20:37:41,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e938d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:41, skipping insertion in model container [2023-11-23 20:37:41,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:34" (2/3) ... [2023-11-23 20:37:41,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e938d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:41, skipping insertion in model container [2023-11-23 20:37:41,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:41" (3/3) ... [2023-11-23 20:37:41,909 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2023-11-23 20:37:41,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:41,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:37:42,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:42,026 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@fdfb24f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:42,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:37:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 1213 states, 794 states have (on average 1.3916876574307304) internal successors, (1105), 809 states have internal predecessors, (1105), 346 states have call successors, (346), 72 states have call predecessors, (346), 71 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) [2023-11-23 20:37:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:37:42,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:42,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:42,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:42,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1817586141, now seen corresponding path program 1 times [2023-11-23 20:37:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:42,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858616445] [2023-11-23 20:37:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:42,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:42,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:42,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858616445] [2023-11-23 20:37:42,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858616445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:42,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:42,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:42,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172062799] [2023-11-23 20:37:42,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:42,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:42,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:42,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:42,822 INFO L87 Difference]: Start difference. First operand has 1213 states, 794 states have (on average 1.3916876574307304) internal successors, (1105), 809 states have internal predecessors, (1105), 346 states have call successors, (346), 72 states have call predecessors, (346), 71 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:37:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:44,068 INFO L93 Difference]: Finished difference Result 2453 states and 3687 transitions. [2023-11-23 20:37:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-23 20:37:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:44,095 INFO L225 Difference]: With dead ends: 2453 [2023-11-23 20:37:44,095 INFO L226 Difference]: Without dead ends: 1230 [2023-11-23 20:37:44,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:44,118 INFO L413 NwaCegarLoop]: 1588 mSDtfsCounter, 48 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3153 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:44,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3153 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 20:37:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-11-23 20:37:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1228. [2023-11-23 20:37:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 808 states have (on average 1.381188118811881) internal successors, (1116), 819 states have internal predecessors, (1116), 345 states have call successors, (345), 75 states have call predecessors, (345), 74 states have return successors, (344), 340 states have call predecessors, (344), 344 states have call successors, (344) [2023-11-23 20:37:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1805 transitions. [2023-11-23 20:37:44,292 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1805 transitions. Word has length 35 [2023-11-23 20:37:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:44,293 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1805 transitions. [2023-11-23 20:37:44,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:37:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1805 transitions. [2023-11-23 20:37:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 20:37:44,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:44,297 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:44,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:37:44,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 902467678, now seen corresponding path program 1 times [2023-11-23 20:37:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336987280] [2023-11-23 20:37:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:44,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:37:44,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:44,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336987280] [2023-11-23 20:37:44,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336987280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:44,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:44,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:44,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436978314] [2023-11-23 20:37:44,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:44,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:44,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:44,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:44,916 INFO L87 Difference]: Start difference. First operand 1228 states and 1805 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 20:37:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:45,959 INFO L93 Difference]: Finished difference Result 1258 states and 1832 transitions. [2023-11-23 20:37:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2023-11-23 20:37:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:45,972 INFO L225 Difference]: With dead ends: 1258 [2023-11-23 20:37:45,973 INFO L226 Difference]: Without dead ends: 1255 [2023-11-23 20:37:45,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:45,976 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 1694 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:45,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 3191 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:37:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2023-11-23 20:37:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1255. [2023-11-23 20:37:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 823 states have (on average 1.3754556500607533) internal successors, (1132), 834 states have internal predecessors, (1132), 349 states have call successors, (349), 83 states have call predecessors, (349), 82 states have return successors, (348), 344 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-23 20:37:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1829 transitions. [2023-11-23 20:37:46,099 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1829 transitions. Word has length 51 [2023-11-23 20:37:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:46,100 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1829 transitions. [2023-11-23 20:37:46,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 20:37:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1829 transitions. [2023-11-23 20:37:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-23 20:37:46,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:46,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:46,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:37:46,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:46,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1055036723, now seen corresponding path program 1 times [2023-11-23 20:37:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:46,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601346464] [2023-11-23 20:37:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:46,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:46,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601346464] [2023-11-23 20:37:46,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 20:37:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028959776] [2023-11-23 20:37:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:46,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:46,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:46,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:47,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:37:47,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:37:47,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:47,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028959776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:47,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:47,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:47,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748337063] [2023-11-23 20:37:47,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:47,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:47,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:47,476 INFO L87 Difference]: Start difference. First operand 1255 states and 1829 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-23 20:37:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:48,455 INFO L93 Difference]: Finished difference Result 2568 states and 3725 transitions. [2023-11-23 20:37:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 135 [2023-11-23 20:37:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:48,467 INFO L225 Difference]: With dead ends: 2568 [2023-11-23 20:37:48,467 INFO L226 Difference]: Without dead ends: 1331 [2023-11-23 20:37:48,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:48,474 INFO L413 NwaCegarLoop]: 1566 mSDtfsCounter, 220 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:48,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 2987 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:37:48,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2023-11-23 20:37:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1325. [2023-11-23 20:37:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 873 states have (on average 1.3711340206185567) internal successors, (1197), 884 states have internal predecessors, (1197), 355 states have call successors, (355), 97 states have call predecessors, (355), 96 states have return successors, (354), 350 states have call predecessors, (354), 354 states have call successors, (354) [2023-11-23 20:37:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1906 transitions. [2023-11-23 20:37:48,565 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1906 transitions. Word has length 135 [2023-11-23 20:37:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:48,566 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1906 transitions. [2023-11-23 20:37:48,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-23 20:37:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1906 transitions. [2023-11-23 20:37:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-23 20:37:48,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:48,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:48,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:48,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:48,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:48,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash 290815845, now seen corresponding path program 1 times [2023-11-23 20:37:48,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:48,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033385061] [2023-11-23 20:37:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:48,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:48,952 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336880783] [2023-11-23 20:37:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:48,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:48,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:48,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:48,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:37:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:49,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:37:49,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:37:49,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:49,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033385061] [2023-11-23 20:37:49,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336880783] [2023-11-23 20:37:49,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336880783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:49,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:49,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639428979] [2023-11-23 20:37:49,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:49,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:49,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:49,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:49,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:49,968 INFO L87 Difference]: Start difference. First operand 1325 states and 1906 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 20:37:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:51,257 INFO L93 Difference]: Finished difference Result 2702 states and 3898 transitions. [2023-11-23 20:37:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 148 [2023-11-23 20:37:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:51,269 INFO L225 Difference]: With dead ends: 2702 [2023-11-23 20:37:51,269 INFO L226 Difference]: Without dead ends: 1395 [2023-11-23 20:37:51,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:51,285 INFO L413 NwaCegarLoop]: 1630 mSDtfsCounter, 237 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:51,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 3173 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 20:37:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2023-11-23 20:37:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1326. [2023-11-23 20:37:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 874 states have (on average 1.368421052631579) internal successors, (1196), 885 states have internal predecessors, (1196), 355 states have call successors, (355), 97 states have call predecessors, (355), 96 states have return successors, (354), 350 states have call predecessors, (354), 354 states have call successors, (354) [2023-11-23 20:37:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1905 transitions. [2023-11-23 20:37:51,380 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1905 transitions. Word has length 148 [2023-11-23 20:37:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:51,381 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 1905 transitions. [2023-11-23 20:37:51,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 20:37:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1905 transitions. [2023-11-23 20:37:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 20:37:51,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:51,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:51,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:51,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:51,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:51,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1219208779, now seen corresponding path program 1 times [2023-11-23 20:37:51,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:51,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178212428] [2023-11-23 20:37:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:51,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:51,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205935149] [2023-11-23 20:37:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:51,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:51,794 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:51,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:37:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:52,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:37:52,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:37:52,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:52,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:52,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178212428] [2023-11-23 20:37:52,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:52,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205935149] [2023-11-23 20:37:52,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205935149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:52,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:52,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:52,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635833420] [2023-11-23 20:37:52,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:52,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:52,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:52,799 INFO L87 Difference]: Start difference. First operand 1326 states and 1905 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:37:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:53,913 INFO L93 Difference]: Finished difference Result 2730 states and 3932 transitions. [2023-11-23 20:37:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:53,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 158 [2023-11-23 20:37:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:53,926 INFO L225 Difference]: With dead ends: 2730 [2023-11-23 20:37:53,926 INFO L226 Difference]: Without dead ends: 1422 [2023-11-23 20:37:53,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:53,936 INFO L413 NwaCegarLoop]: 1625 mSDtfsCounter, 227 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 3168 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:53,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 3168 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 20:37:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2023-11-23 20:37:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1326. [2023-11-23 20:37:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 874 states have (on average 1.368421052631579) internal successors, (1196), 885 states have internal predecessors, (1196), 355 states have call successors, (355), 97 states have call predecessors, (355), 96 states have return successors, (354), 350 states have call predecessors, (354), 354 states have call successors, (354) [2023-11-23 20:37:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1905 transitions. [2023-11-23 20:37:54,033 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1905 transitions. Word has length 158 [2023-11-23 20:37:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:54,035 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 1905 transitions. [2023-11-23 20:37:54,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:37:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1905 transitions. [2023-11-23 20:37:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-11-23 20:37:54,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:54,045 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:54,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:54,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:54,271 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:54,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash 307684707, now seen corresponding path program 1 times [2023-11-23 20:37:54,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:54,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425595601] [2023-11-23 20:37:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:54,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:54,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246130107] [2023-11-23 20:37:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:54,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:54,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:54,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:37:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:55,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:37:55,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 20:37:55,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:55,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425595601] [2023-11-23 20:37:55,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246130107] [2023-11-23 20:37:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246130107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:55,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:37:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027630787] [2023-11-23 20:37:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:37:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:37:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:55,760 INFO L87 Difference]: Start difference. First operand 1326 states and 1905 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-23 20:37:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:57,696 INFO L93 Difference]: Finished difference Result 2780 states and 4010 transitions. [2023-11-23 20:37:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:37:57,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 197 [2023-11-23 20:37:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:57,719 INFO L225 Difference]: With dead ends: 2780 [2023-11-23 20:37:57,720 INFO L226 Difference]: Without dead ends: 1472 [2023-11-23 20:37:57,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:37:57,730 INFO L413 NwaCegarLoop]: 1660 mSDtfsCounter, 286 mSDsluCounter, 4643 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 6303 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:57,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 6303 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 20:37:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2023-11-23 20:37:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1334. [2023-11-23 20:37:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 879 states have (on average 1.366325369738339) internal successors, (1201), 890 states have internal predecessors, (1201), 358 states have call successors, (358), 97 states have call predecessors, (358), 96 states have return successors, (357), 353 states have call predecessors, (357), 357 states have call successors, (357) [2023-11-23 20:37:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1916 transitions. [2023-11-23 20:37:57,815 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1916 transitions. Word has length 197 [2023-11-23 20:37:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:57,816 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1916 transitions. [2023-11-23 20:37:57,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-23 20:37:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1916 transitions. [2023-11-23 20:37:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-23 20:37:57,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:57,826 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:57,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:58,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:58,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:58,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:58,054 INFO L85 PathProgramCache]: Analyzing trace with hash 341166950, now seen corresponding path program 1 times [2023-11-23 20:37:58,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:58,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854288893] [2023-11-23 20:37:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:58,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:58,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:58,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551601049] [2023-11-23 20:37:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:58,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:58,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:58,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3aaae33-accf-4f5b-8809-15341e002813/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:37:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:59,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 2821 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 20:37:59,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:59,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:37:59,927 WARN L876 $PredicateComparison]: unable to prove that (exists ((|init_completion_~x#1.base| Int)) (and (<= |c_init_completion_#in~x#1.base| |init_completion_~x#1.base|) (= |c_#memory_int| (store |c_old(#memory_int)| |init_completion_~x#1.base| (select |c_#memory_int| |init_completion_~x#1.base|))))) is different from true [2023-11-23 20:37:59,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:37:59,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:38:00,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:38:00,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-23 20:38:00,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-23 20:38:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:38:00,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:38:00,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:00,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854288893] [2023-11-23 20:38:00,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:38:00,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551601049] [2023-11-23 20:38:00,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551601049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [281528110] [2023-11-23 20:38:00,637 INFO L159 IcfgInterpreter]: Started Sifa with 162 locations of interest [2023-11-23 20:38:00,638 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:38:00,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:38:00,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:38:00,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs