./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 9bd2c7ff 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_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/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_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ --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-9bd2c7f [2023-11-19 05:17:44,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:44,752 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:17:44,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:44,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:44,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:44,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:44,806 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:44,807 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:44,812 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:44,812 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:44,813 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:44,814 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:44,815 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:44,816 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:44,816 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:44,817 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:44,817 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:44,818 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:44,818 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:44,819 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:44,820 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:44,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:44,821 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:44,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:44,822 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:44,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:44,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:44,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:44,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:44,826 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:44,826 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:44,826 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:44,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:44,827 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:44,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:44,827 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:44,828 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:44,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:44,828 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:44,829 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:44,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:44,829 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_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 [2023-11-19 05:17:45,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:45,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:45,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:45,227 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:45,227 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:45,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/../../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 [2023-11-19 05:17:48,495 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:49,161 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:49,162 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/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 [2023-11-19 05:17:49,226 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/data/96515132a/0b6134a40f9c4635947f489812440d21/FLAGbaed45e62 [2023-11-19 05:17:49,247 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/data/96515132a/0b6134a40f9c4635947f489812440d21 [2023-11-19 05:17:49,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:49,258 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:49,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:49,264 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:49,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:49,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:49" (1/1) ... [2023-11-19 05:17:49,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50df6b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:49, skipping insertion in model container [2023-11-19 05:17:49,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:49" (1/1) ... [2023-11-19 05:17:49,448 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:49,968 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-19 05:17:49,969 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] [2023-11-19 05:17:50,236 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_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/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] [2023-11-19 05:17:51,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:51,206 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:51,308 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-19 05:17:51,308 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] [2023-11-19 05:17:51,311 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] [2023-11-19 05:17:51,313 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] [2023-11-19 05:17:51,313 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] [2023-11-19 05:17:51,327 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_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/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] [2023-11-19 05:17:51,328 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] [2023-11-19 05:17:51,329 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] [2023-11-19 05:17:51,334 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] [2023-11-19 05:17:51,336 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] [2023-11-19 05:17:51,337 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] [2023-11-19 05:17:51,338 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] [2023-11-19 05:17:51,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:51,704 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:51,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51 WrapperNode [2023-11-19 05:17:51,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:51,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:51,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:51,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:51,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:51,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,148 INFO L138 Inliner]: procedures = 189, calls = 1841, calls flagged for inlining = 79, calls inlined = 70, statements flattened = 4898 [2023-11-19 05:17:52,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:52,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:52,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:52,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:52,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,239 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,401 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,469 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,495 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:52,532 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:52,532 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:52,532 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:52,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (1/1) ... [2023-11-19 05:17:52,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:52,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:52,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:52,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2023-11-19 05:17:52,631 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2023-11-19 05:17:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-19 05:17:52,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-19 05:17:52,632 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-19 05:17:52,632 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-19 05:17:52,632 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-19 05:17:52,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-19 05:17:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-19 05:17:52,634 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-19 05:17:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure free_sglist [2023-11-19 05:17:52,634 INFO L138 BoogieDeclarations]: Found implementation of procedure free_sglist [2023-11-19 05:17:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2023-11-19 05:17:52,635 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2023-11-19 05:17:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure test_iso_queue [2023-11-19 05:17:52,636 INFO L138 BoogieDeclarations]: Found implementation of procedure test_iso_queue [2023-11-19 05:17:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure simple_check_buf [2023-11-19 05:17:52,637 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_check_buf [2023-11-19 05:17:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 05:17:52,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 05:17:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:17:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-19 05:17:52,640 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-19 05:17:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure perform_sglist [2023-11-19 05:17:52,641 INFO L138 BoogieDeclarations]: Found implementation of procedure perform_sglist [2023-11-19 05:17:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure test_unaligned_bulk [2023-11-19 05:17:52,642 INFO L138 BoogieDeclarations]: Found implementation of procedure test_unaligned_bulk [2023-11-19 05:17:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-19 05:17:52,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-19 05:17:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_sglist [2023-11-19 05:17:52,643 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_sglist [2023-11-19 05:17:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 05:17:52,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 05:17:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:17:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:17:52,644 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2023-11-19 05:17:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2023-11-19 05:17:52,644 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-19 05:17:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-19 05:17:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-19 05:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-19 05:17:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 05:17:52,650 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 05:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure set_altsetting [2023-11-19 05:17:52,650 INFO L138 BoogieDeclarations]: Found implementation of procedure set_altsetting [2023-11-19 05:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-19 05:17:52,650 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-19 05:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 05:17:52,652 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 05:17:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-19 05:17:52,653 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-19 05:17:52,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:17:52,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:17:52,654 INFO L130 BoogieDeclarations]: Found specification of procedure verify_not_halted [2023-11-19 05:17:52,655 INFO L138 BoogieDeclarations]: Found implementation of procedure verify_not_halted [2023-11-19 05:17:52,655 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2023-11-19 05:17:52,655 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2023-11-19 05:17:52,655 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-19 05:17:52,656 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-19 05:17:52,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:17:52,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:17:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 05:17:52,657 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 05:17:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2023-11-19 05:17:52,657 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2023-11-19 05:17:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:17:52,658 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:17:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure test_halt [2023-11-19 05:17:52,658 INFO L138 BoogieDeclarations]: Found implementation of procedure test_halt [2023-11-19 05:17:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_alloc_urb [2023-11-19 05:17:52,659 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_alloc_urb [2023-11-19 05:17:52,659 INFO L130 BoogieDeclarations]: Found specification of procedure unlink1 [2023-11-19 05:17:52,659 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink1 [2023-11-19 05:17:52,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:17:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_out [2023-11-19 05:17:52,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_out [2023-11-19 05:17:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 05:17:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 05:17:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-19 05:17:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-19 05:17:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_status [2023-11-19 05:17:52,662 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_status [2023-11-19 05:17:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure is_good_config [2023-11-19 05:17:52,662 INFO L138 BoogieDeclarations]: Found implementation of procedure is_good_config [2023-11-19 05:17:52,662 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2023-11-19 05:17:52,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2023-11-19 05:17:52,663 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-19 05:17:52,663 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-19 05:17:52,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:17:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:17:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2023-11-19 05:17:52,664 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2023-11-19 05:17:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-19 05:17:52,664 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-19 05:17:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-19 05:17:52,665 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-19 05:17:52,666 INFO L130 BoogieDeclarations]: Found specification of procedure testdev_to_usbdev [2023-11-19 05:17:52,666 INFO L138 BoogieDeclarations]: Found implementation of procedure testdev_to_usbdev [2023-11-19 05:17:52,666 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-19 05:17:52,667 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-19 05:17:52,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:17:52,667 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_simple [2023-11-19 05:17:52,667 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_simple [2023-11-19 05:17:52,668 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-19 05:17:52,669 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-19 05:17:52,669 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2023-11-19 05:17:52,669 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2023-11-19 05:17:52,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-19 05:17:52,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-19 05:17:52,670 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-19 05:17:52,670 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-19 05:17:52,670 INFO L130 BoogieDeclarations]: Found specification of procedure simple_io [2023-11-19 05:17:52,670 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_io [2023-11-19 05:17:52,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:17:52,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:17:52,671 INFO L130 BoogieDeclarations]: Found specification of procedure simple_alloc_urb [2023-11-19 05:17:52,671 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_alloc_urb [2023-11-19 05:17:52,671 INFO L130 BoogieDeclarations]: Found specification of procedure simple_free_urb [2023-11-19 05:17:52,672 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_free_urb [2023-11-19 05:17:52,672 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-19 05:17:52,672 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-19 05:17:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure simple_fill_buf [2023-11-19 05:17:52,673 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_fill_buf [2023-11-19 05:17:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure do_gettimeofday [2023-11-19 05:17:52,674 INFO L138 BoogieDeclarations]: Found implementation of procedure do_gettimeofday [2023-11-19 05:17:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 05:17:52,674 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 05:17:52,674 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-19 05:17:52,675 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-19 05:17:52,675 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_ioctl [2023-11-19 05:17:52,675 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_ioctl [2023-11-19 05:17:52,675 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_offset [2023-11-19 05:17:52,675 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_offset [2023-11-19 05:17:52,676 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-19 05:17:52,678 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-19 05:17:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-19 05:17:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-19 05:17:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2023-11-19 05:17:52,684 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2023-11-19 05:17:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_disconnect [2023-11-19 05:17:52,685 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_disconnect [2023-11-19 05:17:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure check_guard_bytes [2023-11-19 05:17:52,686 INFO L138 BoogieDeclarations]: Found implementation of procedure check_guard_bytes [2023-11-19 05:17:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-19 05:17:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-19 05:17:52,691 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-19 05:17:52,692 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-19 05:17:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 05:17:52,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 05:17:52,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:52,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:52,693 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_descriptor [2023-11-19 05:17:52,693 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_descriptor [2023-11-19 05:17:53,473 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:53,480 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:54,357 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 05:17:58,366 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:18:00,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:18:00,118 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:18:00,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:18:00 BoogieIcfgContainer [2023-11-19 05:18:00,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:18:00,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:18:00,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:18:00,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:18:00,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:49" (1/3) ... [2023-11-19 05:18:00,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1fca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:18:00, skipping insertion in model container [2023-11-19 05:18:00,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:51" (2/3) ... [2023-11-19 05:18:00,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1fca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:18:00, skipping insertion in model container [2023-11-19 05:18:00,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:18:00" (3/3) ... [2023-11-19 05:18:00,145 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 [2023-11-19 05:18:00,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:18:00,169 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:18:00,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:18:00,311 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;@458de9c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:18:00,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:18:00,324 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) [2023-11-19 05:18:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 05:18:00,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:00,343 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] [2023-11-19 05:18:00,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:00,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash -402689650, now seen corresponding path program 1 times [2023-11-19 05:18:00,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:00,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909662291] [2023-11-19 05:18:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:18:01,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909662291] [2023-11-19 05:18:01,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909662291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:01,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:01,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:18:01,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322350803] [2023-11-19 05:18:01,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:01,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:01,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:01,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:01,138 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) [2023-11-19 05:18:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:02,538 INFO L93 Difference]: Finished difference Result 2453 states and 3687 transitions. [2023-11-19 05:18:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:02,541 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 [2023-11-19 05:18:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:02,572 INFO L225 Difference]: With dead ends: 2453 [2023-11-19 05:18:02,572 INFO L226 Difference]: Without dead ends: 1230 [2023-11-19 05:18:02,593 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 [2023-11-19 05:18:02,597 INFO L413 NwaCegarLoop]: 1588 mSDtfsCounter, 48 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:02,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3153 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:18:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-11-19 05:18:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1228. [2023-11-19 05:18:02,763 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) [2023-11-19 05:18:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1805 transitions. [2023-11-19 05:18:02,779 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1805 transitions. Word has length 35 [2023-11-19 05:18:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:02,780 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1805 transitions. [2023-11-19 05:18:02,780 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) [2023-11-19 05:18:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1805 transitions. [2023-11-19 05:18:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 05:18:02,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:02,785 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] [2023-11-19 05:18:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:18:02,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:02,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash -457131087, now seen corresponding path program 1 times [2023-11-19 05:18:02,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542682846] [2023-11-19 05:18:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:18:03,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:03,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542682846] [2023-11-19 05:18:03,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542682846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:03,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:03,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:18:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564990738] [2023-11-19 05:18:03,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:03,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:18:03,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:18:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:18:03,550 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) [2023-11-19 05:18:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:04,658 INFO L93 Difference]: Finished difference Result 1258 states and 1832 transitions. [2023-11-19 05:18:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:18:04,659 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 [2023-11-19 05:18:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:04,678 INFO L225 Difference]: With dead ends: 1258 [2023-11-19 05:18:04,678 INFO L226 Difference]: Without dead ends: 1255 [2023-11-19 05:18:04,679 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 [2023-11-19 05:18:04,681 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 1694 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:04,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 3191 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:18:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2023-11-19 05:18:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1255. [2023-11-19 05:18:04,811 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) [2023-11-19 05:18:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1829 transitions. [2023-11-19 05:18:04,829 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1829 transitions. Word has length 51 [2023-11-19 05:18:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:04,831 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1829 transitions. [2023-11-19 05:18:04,836 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) [2023-11-19 05:18:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1829 transitions. [2023-11-19 05:18:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-19 05:18:04,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:04,865 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] [2023-11-19 05:18:04,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:18:04,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:04,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:04,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1801647384, now seen corresponding path program 1 times [2023-11-19 05:18:04,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:04,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307177519] [2023-11-19 05:18:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:05,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307177519] [2023-11-19 05:18:05,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:18:05,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533170578] [2023-11-19 05:18:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:05,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:05,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:05,186 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:05,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:18:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:06,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:06,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:18:06,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:06,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533170578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:06,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:06,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:18:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496147907] [2023-11-19 05:18:06,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:06,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:06,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:06,331 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) [2023-11-19 05:18:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:07,354 INFO L93 Difference]: Finished difference Result 2568 states and 3725 transitions. [2023-11-19 05:18:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:07,355 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 [2023-11-19 05:18:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:07,368 INFO L225 Difference]: With dead ends: 2568 [2023-11-19 05:18:07,368 INFO L226 Difference]: Without dead ends: 1331 [2023-11-19 05:18:07,375 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 [2023-11-19 05:18:07,376 INFO L413 NwaCegarLoop]: 1566 mSDtfsCounter, 220 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:07,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 2987 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:18:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2023-11-19 05:18:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1325. [2023-11-19 05:18:07,452 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) [2023-11-19 05:18:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1906 transitions. [2023-11-19 05:18:07,464 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1906 transitions. Word has length 135 [2023-11-19 05:18:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:07,465 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1906 transitions. [2023-11-19 05:18:07,465 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) [2023-11-19 05:18:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1906 transitions. [2023-11-19 05:18:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-19 05:18:07,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:07,474 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] [2023-11-19 05:18:07,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:07,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:07,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:07,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1387689399, now seen corresponding path program 1 times [2023-11-19 05:18:07,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:07,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739162195] [2023-11-19 05:18:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:07,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:07,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:07,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371120179] [2023-11-19 05:18:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:07,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:07,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:07,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:07,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:18:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:08,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:18:08,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:18:08,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:08,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739162195] [2023-11-19 05:18:08,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371120179] [2023-11-19 05:18:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371120179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:08,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:18:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095783954] [2023-11-19 05:18:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:08,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:18:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:18:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:18:08,979 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) [2023-11-19 05:18:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:10,263 INFO L93 Difference]: Finished difference Result 2702 states and 3898 transitions. [2023-11-19 05:18:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:18:10,264 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 [2023-11-19 05:18:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:10,278 INFO L225 Difference]: With dead ends: 2702 [2023-11-19 05:18:10,278 INFO L226 Difference]: Without dead ends: 1395 [2023-11-19 05:18:10,286 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 [2023-11-19 05:18:10,287 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, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:10,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 3173 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:18:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2023-11-19 05:18:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1326. [2023-11-19 05:18:10,372 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) [2023-11-19 05:18:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1905 transitions. [2023-11-19 05:18:10,384 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1905 transitions. Word has length 148 [2023-11-19 05:18:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:10,385 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 1905 transitions. [2023-11-19 05:18:10,385 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) [2023-11-19 05:18:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1905 transitions. [2023-11-19 05:18:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-19 05:18:10,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:10,396 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] [2023-11-19 05:18:10,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:10,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:10,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:10,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash 68988443, now seen corresponding path program 1 times [2023-11-19 05:18:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:10,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531406106] [2023-11-19 05:18:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:10,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:10,739 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:10,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615346567] [2023-11-19 05:18:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:10,741 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:10,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:18:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:11,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:18:11,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:18:11,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:11,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531406106] [2023-11-19 05:18:11,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615346567] [2023-11-19 05:18:11,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615346567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:11,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:11,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:18:11,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746710752] [2023-11-19 05:18:11,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:11,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:18:11,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:11,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:18:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:18:11,949 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) [2023-11-19 05:18:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:13,317 INFO L93 Difference]: Finished difference Result 2704 states and 3894 transitions. [2023-11-19 05:18:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:18:13,318 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 [2023-11-19 05:18:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:13,329 INFO L225 Difference]: With dead ends: 2704 [2023-11-19 05:18:13,330 INFO L226 Difference]: Without dead ends: 1396 [2023-11-19 05:18:13,337 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 [2023-11-19 05:18:13,342 INFO L413 NwaCegarLoop]: 1625 mSDtfsCounter, 227 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 3168 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:13,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 3168 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:18:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2023-11-19 05:18:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1326. [2023-11-19 05:18:13,428 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) [2023-11-19 05:18:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1905 transitions. [2023-11-19 05:18:13,448 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1905 transitions. Word has length 158 [2023-11-19 05:18:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:13,451 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 1905 transitions. [2023-11-19 05:18:13,451 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) [2023-11-19 05:18:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1905 transitions. [2023-11-19 05:18:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-19 05:18:13,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:13,467 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] [2023-11-19 05:18:13,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:13,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:13,672 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:13,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1227235006, now seen corresponding path program 1 times [2023-11-19 05:18:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916983269] [2023-11-19 05:18:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:13,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:13,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899431719] [2023-11-19 05:18:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:13,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:13,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:13,835 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:13,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:18:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:14,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:18:14,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 05:18:15,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:15,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:15,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916983269] [2023-11-19 05:18:15,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:15,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899431719] [2023-11-19 05:18:15,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899431719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:15,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:15,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:18:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004514308] [2023-11-19 05:18:15,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:15,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:18:15,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:15,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:18:15,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:15,065 INFO L87 Difference]: Start difference. First operand 1326 states and 1905 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2023-11-19 05:18:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:17,512 INFO L93 Difference]: Finished difference Result 2780 states and 4010 transitions. [2023-11-19 05:18:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:18:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 196 [2023-11-19 05:18:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:17,531 INFO L225 Difference]: With dead ends: 2780 [2023-11-19 05:18:17,531 INFO L226 Difference]: Without dead ends: 1472 [2023-11-19 05:18:17,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:18:17,539 INFO L413 NwaCegarLoop]: 1660 mSDtfsCounter, 287 mSDsluCounter, 6042 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 7702 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:17,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 7702 Invalid, 1479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-19 05:18:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2023-11-19 05:18:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1334. [2023-11-19 05:18:17,691 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) [2023-11-19 05:18:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1916 transitions. [2023-11-19 05:18:17,700 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1916 transitions. Word has length 196 [2023-11-19 05:18:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:17,702 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1916 transitions. [2023-11-19 05:18:17,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2023-11-19 05:18:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1916 transitions. [2023-11-19 05:18:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-19 05:18:17,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:17,714 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] [2023-11-19 05:18:17,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:17,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:17,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:17,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:17,931 INFO L85 PathProgramCache]: Analyzing trace with hash 772030550, now seen corresponding path program 1 times [2023-11-19 05:18:17,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:17,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054271892] [2023-11-19 05:18:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:17,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:18,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:18,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994725372] [2023-11-19 05:18:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:18,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:18,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a62650-9ce0-4cb0-882c-0bf35b1143c0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:18:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:19,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 05:18:19,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:20,213 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 32 treesize of output 25 [2023-11-19 05:18:20,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:20,296 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 32 treesize of output 25 [2023-11-19 05:18:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:20,315 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 32 treesize of output 25 [2023-11-19 05:18:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:20,805 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 43 treesize of output 34 [2023-11-19 05:18:21,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:18:21,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2023-11-19 05:18:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:18:21,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:18:22,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:22,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054271892] [2023-11-19 05:18:22,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994725372] [2023-11-19 05:18:22,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994725372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1649854432] [2023-11-19 05:18:22,216 INFO L159 IcfgInterpreter]: Started Sifa with 162 locations of interest [2023-11-19 05:18:22,217 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:18:22,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:18:22,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:18:22,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs