./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 cf1a7837 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_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/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_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX --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-cf1a783 [2023-11-12 00:12:53,434 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:12:53,499 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:12:53,505 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:12:53,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:12:53,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:12:53,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:12:53,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:12:53,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:12:53,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:12:53,553 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:12:53,554 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:12:53,555 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:12:53,557 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:12:53,557 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:12:53,558 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:12:53,558 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:12:53,559 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:12:53,559 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:12:53,560 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:12:53,560 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:12:53,561 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:12:53,562 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:12:53,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:12:53,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:12:53,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:12:53,564 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:12:53,565 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:12:53,565 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:12:53,566 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:12:53,567 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:12:53,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:12:53,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:12:53,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:53,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:12:53,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:12:53,569 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:12:53,569 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:12:53,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:12:53,570 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:12:53,570 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:12:53,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:12:53,571 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_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 [2023-11-12 00:12:53,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:12:53,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:12:53,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:12:53,921 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:12:53,922 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:12:53,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/../../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 [2023-11-12 00:12:57,088 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:12:57,680 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:12:57,682 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/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 [2023-11-12 00:12:57,728 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/data/e20d05d42/f4db2dffa7b946d4b8f92511b353481e/FLAG8109d63e5 [2023-11-12 00:12:57,750 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/data/e20d05d42/f4db2dffa7b946d4b8f92511b353481e [2023-11-12 00:12:57,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:12:57,760 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:12:57,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:57,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:12:57,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:12:57,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:57" (1/1) ... [2023-11-12 00:12:57,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@759e5778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:57, skipping insertion in model container [2023-11-12 00:12:57,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:57" (1/1) ... [2023-11-12 00:12:57,900 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:12:58,413 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-12 00:12:58,414 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2023-11-12 00:12:58,761 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_d1b6d769-32fa-457e-a012-b966acfee9ae/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] [2023-11-12 00:12:59,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:59,775 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:12:59,864 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2023-11-12 00:12:59,865 WARN L1270 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2023-11-12 00:12:59,867 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] [2023-11-12 00:12:59,869 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] [2023-11-12 00:12:59,870 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] [2023-11-12 00:12:59,886 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_d1b6d769-32fa-457e-a012-b966acfee9ae/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] [2023-11-12 00:12:59,888 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] [2023-11-12 00:12:59,889 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] [2023-11-12 00:12:59,889 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] [2023-11-12 00:12:59,891 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] [2023-11-12 00:12:59,891 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] [2023-11-12 00:12:59,893 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] [2023-11-12 00:13:00,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:13:00,152 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:13:00,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00 WrapperNode [2023-11-12 00:13:00,153 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:13:00,154 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:00,154 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:13:00,155 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:13:00,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,234 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,497 INFO L138 Inliner]: procedures = 189, calls = 1841, calls flagged for inlining = 79, calls inlined = 70, statements flattened = 4898 [2023-11-12 00:13:00,498 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:00,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:13:00,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:13:00,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:13:00,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,565 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,711 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:13:00,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:13:00,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:13:00,781 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:13:00,782 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (1/1) ... [2023-11-12 00:13:00,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:13:00,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:00,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:13:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2023-11-12 00:13:00,869 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2023-11-12 00:13:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-12 00:13:00,869 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-12 00:13:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-12 00:13:00,869 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-12 00:13:00,870 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-12 00:13:00,870 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-12 00:13:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-12 00:13:00,872 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-12 00:13:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure free_sglist [2023-11-12 00:13:00,872 INFO L138 BoogieDeclarations]: Found implementation of procedure free_sglist [2023-11-12 00:13:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2023-11-12 00:13:00,873 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2023-11-12 00:13:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure test_iso_queue [2023-11-12 00:13:00,874 INFO L138 BoogieDeclarations]: Found implementation of procedure test_iso_queue [2023-11-12 00:13:00,875 INFO L130 BoogieDeclarations]: Found specification of procedure simple_check_buf [2023-11-12 00:13:00,875 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_check_buf [2023-11-12 00:13:00,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-12 00:13:00,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-12 00:13:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:13:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-12 00:13:00,877 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-12 00:13:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure perform_sglist [2023-11-12 00:13:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure perform_sglist [2023-11-12 00:13:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure test_unaligned_bulk [2023-11-12 00:13:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure test_unaligned_bulk [2023-11-12 00:13:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-12 00:13:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-12 00:13:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_sglist [2023-11-12 00:13:00,879 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_sglist [2023-11-12 00:13:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-12 00:13:00,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-12 00:13:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 00:13:00,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 00:13:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2023-11-12 00:13:00,880 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2023-11-12 00:13:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-12 00:13:00,881 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-12 00:13:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-12 00:13:00,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-12 00:13:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-12 00:13:00,881 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-12 00:13:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure set_altsetting [2023-11-12 00:13:00,882 INFO L138 BoogieDeclarations]: Found implementation of procedure set_altsetting [2023-11-12 00:13:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2023-11-12 00:13:00,882 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2023-11-12 00:13:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:13:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-12 00:13:00,883 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-12 00:13:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-12 00:13:00,884 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-12 00:13:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 00:13:00,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 00:13:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure verify_not_halted [2023-11-12 00:13:00,886 INFO L138 BoogieDeclarations]: Found implementation of procedure verify_not_halted [2023-11-12 00:13:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2023-11-12 00:13:00,886 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2023-11-12 00:13:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-11-12 00:13:00,887 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-11-12 00:13:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-12 00:13:00,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-12 00:13:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 00:13:00,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:13:00,889 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 00:13:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2023-11-12 00:13:00,890 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2023-11-12 00:13:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:13:00,890 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:13:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure test_halt [2023-11-12 00:13:00,890 INFO L138 BoogieDeclarations]: Found implementation of procedure test_halt [2023-11-12 00:13:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_alloc_urb [2023-11-12 00:13:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_alloc_urb [2023-11-12 00:13:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure unlink1 [2023-11-12 00:13:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink1 [2023-11-12 00:13:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:13:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_out [2023-11-12 00:13:00,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_out [2023-11-12 00:13:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-12 00:13:00,893 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-12 00:13:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2023-11-12 00:13:00,893 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2023-11-12 00:13:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_status [2023-11-12 00:13:00,894 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_status [2023-11-12 00:13:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:13:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure is_good_config [2023-11-12 00:13:00,894 INFO L138 BoogieDeclarations]: Found implementation of procedure is_good_config [2023-11-12 00:13:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2023-11-12 00:13:00,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2023-11-12 00:13:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2023-11-12 00:13:00,895 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2023-11-12 00:13:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:13:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:13:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2023-11-12 00:13:00,896 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2023-11-12 00:13:00,896 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-11-12 00:13:00,896 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-11-12 00:13:00,896 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-12 00:13:00,896 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-12 00:13:00,896 INFO L130 BoogieDeclarations]: Found specification of procedure testdev_to_usbdev [2023-11-12 00:13:00,897 INFO L138 BoogieDeclarations]: Found implementation of procedure testdev_to_usbdev [2023-11-12 00:13:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-12 00:13:00,898 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-12 00:13:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:13:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_simple [2023-11-12 00:13:00,898 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_simple [2023-11-12 00:13:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-12 00:13:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-12 00:13:00,900 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2023-11-12 00:13:00,900 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2023-11-12 00:13:00,900 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-12 00:13:00,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-12 00:13:00,900 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-12 00:13:00,900 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-12 00:13:00,901 INFO L130 BoogieDeclarations]: Found specification of procedure simple_io [2023-11-12 00:13:00,901 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_io [2023-11-12 00:13:00,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:13:00,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:13:00,901 INFO L130 BoogieDeclarations]: Found specification of procedure simple_alloc_urb [2023-11-12 00:13:00,901 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_alloc_urb [2023-11-12 00:13:00,902 INFO L130 BoogieDeclarations]: Found specification of procedure simple_free_urb [2023-11-12 00:13:00,902 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_free_urb [2023-11-12 00:13:00,902 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-12 00:13:00,902 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-12 00:13:00,903 INFO L130 BoogieDeclarations]: Found specification of procedure simple_fill_buf [2023-11-12 00:13:00,903 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_fill_buf [2023-11-12 00:13:00,903 INFO L130 BoogieDeclarations]: Found specification of procedure do_gettimeofday [2023-11-12 00:13:00,903 INFO L138 BoogieDeclarations]: Found implementation of procedure do_gettimeofday [2023-11-12 00:13:00,904 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-12 00:13:00,904 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-12 00:13:00,904 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-12 00:13:00,904 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-12 00:13:00,904 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_ioctl [2023-11-12 00:13:00,904 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_ioctl [2023-11-12 00:13:00,905 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_offset [2023-11-12 00:13:00,905 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_offset [2023-11-12 00:13:00,906 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-12 00:13:00,906 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-12 00:13:00,911 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-12 00:13:00,912 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-12 00:13:00,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:13:00,913 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2023-11-12 00:13:00,913 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2023-11-12 00:13:00,914 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_disconnect [2023-11-12 00:13:00,915 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_disconnect [2023-11-12 00:13:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure check_guard_bytes [2023-11-12 00:13:00,916 INFO L138 BoogieDeclarations]: Found implementation of procedure check_guard_bytes [2023-11-12 00:13:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-12 00:13:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-12 00:13:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-12 00:13:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-12 00:13:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-12 00:13:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-12 00:13:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:13:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:13:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_descriptor [2023-11-12 00:13:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_descriptor [2023-11-12 00:13:01,527 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:13:01,531 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:13:02,446 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-12 00:13:05,760 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:13:07,250 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:13:07,251 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:13:07,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:07 BoogieIcfgContainer [2023-11-12 00:13:07,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:13:07,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:13:07,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:13:07,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:13:07,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:12:57" (1/3) ... [2023-11-12 00:13:07,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a2fbcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:07, skipping insertion in model container [2023-11-12 00:13:07,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:00" (2/3) ... [2023-11-12 00:13:07,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a2fbcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:07, skipping insertion in model container [2023-11-12 00:13:07,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:07" (3/3) ... [2023-11-12 00:13:07,270 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 [2023-11-12 00:13:07,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:13:07,291 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:13:07,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:13:07,407 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;@19258f86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:13:07,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:13:07,420 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) [2023-11-12 00:13:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 00:13:07,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:07,434 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] [2023-11-12 00:13:07,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:07,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash -402689650, now seen corresponding path program 1 times [2023-11-12 00:13:07,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:07,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994895888] [2023-11-12 00:13:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:07,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:13:08,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994895888] [2023-11-12 00:13:08,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994895888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:08,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:08,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:13:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082353682] [2023-11-12 00:13:08,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:08,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:13:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:13:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:13:08,106 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) [2023-11-12 00:13:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:09,422 INFO L93 Difference]: Finished difference Result 2453 states and 3687 transitions. [2023-11-12 00:13:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:13:09,425 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 [2023-11-12 00:13:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:09,469 INFO L225 Difference]: With dead ends: 2453 [2023-11-12 00:13:09,469 INFO L226 Difference]: Without dead ends: 1230 [2023-11-12 00:13:09,489 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 [2023-11-12 00:13:09,494 INFO L413 NwaCegarLoop]: 1588 mSDtfsCounter, 48 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:09,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3153 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:13:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-11-12 00:13:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1228. [2023-11-12 00:13:09,675 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) [2023-11-12 00:13:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1805 transitions. [2023-11-12 00:13:09,694 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1805 transitions. Word has length 35 [2023-11-12 00:13:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:09,695 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1805 transitions. [2023-11-12 00:13:09,695 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) [2023-11-12 00:13:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1805 transitions. [2023-11-12 00:13:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:13:09,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:09,707 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] [2023-11-12 00:13:09,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:13:09,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:09,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -457131087, now seen corresponding path program 1 times [2023-11-12 00:13:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:09,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436206090] [2023-11-12 00:13:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:13:10,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:10,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436206090] [2023-11-12 00:13:10,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436206090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:10,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:10,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:13:10,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786719775] [2023-11-12 00:13:10,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:10,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:13:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:13:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:13:10,422 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) [2023-11-12 00:13:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:11,376 INFO L93 Difference]: Finished difference Result 1258 states and 1832 transitions. [2023-11-12 00:13:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:13:11,377 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 [2023-11-12 00:13:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:11,387 INFO L225 Difference]: With dead ends: 1258 [2023-11-12 00:13:11,387 INFO L226 Difference]: Without dead ends: 1255 [2023-11-12 00:13:11,391 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 [2023-11-12 00:13:11,392 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 1694 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:11,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 3191 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:13:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2023-11-12 00:13:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1255. [2023-11-12 00:13:11,474 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) [2023-11-12 00:13:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1829 transitions. [2023-11-12 00:13:11,486 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1829 transitions. Word has length 51 [2023-11-12 00:13:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:11,487 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1829 transitions. [2023-11-12 00:13:11,487 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) [2023-11-12 00:13:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1829 transitions. [2023-11-12 00:13:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 00:13:11,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:11,504 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] [2023-11-12 00:13:11,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:13:11,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:11,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1801647384, now seen corresponding path program 1 times [2023-11-12 00:13:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:11,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911145416] [2023-11-12 00:13:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:11,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:11,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:11,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911145416] [2023-11-12 00:13:11,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:13:11,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739661299] [2023-11-12 00:13:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:11,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:11,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:11,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:11,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:13:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:12,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:13:12,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:13:12,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:13:12,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739661299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:12,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:12,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:13:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534848618] [2023-11-12 00:13:12,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:12,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:13:12,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:12,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:13:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:13:12,700 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) [2023-11-12 00:13:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:13,663 INFO L93 Difference]: Finished difference Result 2568 states and 3725 transitions. [2023-11-12 00:13:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:13:13,664 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 [2023-11-12 00:13:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:13,675 INFO L225 Difference]: With dead ends: 2568 [2023-11-12 00:13:13,676 INFO L226 Difference]: Without dead ends: 1331 [2023-11-12 00:13:13,761 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 [2023-11-12 00:13:13,764 INFO L413 NwaCegarLoop]: 1566 mSDtfsCounter, 220 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:13,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 2987 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:13:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2023-11-12 00:13:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1325. [2023-11-12 00:13:13,843 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) [2023-11-12 00:13:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1906 transitions. [2023-11-12 00:13:13,855 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1906 transitions. Word has length 135 [2023-11-12 00:13:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:13,859 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1906 transitions. [2023-11-12 00:13:13,859 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) [2023-11-12 00:13:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1906 transitions. [2023-11-12 00:13:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-12 00:13:13,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:13,870 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] [2023-11-12 00:13:13,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:14,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:14,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1387689399, now seen corresponding path program 1 times [2023-11-12 00:13:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850305352] [2023-11-12 00:13:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:14,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:14,204 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:14,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431492142] [2023-11-12 00:13:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:14,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:14,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:14,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:13:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:15,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:13:15,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:13:15,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:13:15,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850305352] [2023-11-12 00:13:15,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431492142] [2023-11-12 00:13:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431492142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:15,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:15,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:13:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141254588] [2023-11-12 00:13:15,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:15,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:13:15,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:13:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:13:15,287 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) [2023-11-12 00:13:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:16,670 INFO L93 Difference]: Finished difference Result 2702 states and 3898 transitions. [2023-11-12 00:13:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:13:16,671 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 [2023-11-12 00:13:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:16,684 INFO L225 Difference]: With dead ends: 2702 [2023-11-12 00:13:16,684 INFO L226 Difference]: Without dead ends: 1395 [2023-11-12 00:13:16,692 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 [2023-11-12 00:13:16,693 INFO L413 NwaCegarLoop]: 1630 mSDtfsCounter, 237 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:16,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 3173 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 00:13:16,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2023-11-12 00:13:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1326. [2023-11-12 00:13:16,782 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) [2023-11-12 00:13:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1905 transitions. [2023-11-12 00:13:16,795 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1905 transitions. Word has length 148 [2023-11-12 00:13:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:16,795 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 1905 transitions. [2023-11-12 00:13:16,796 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) [2023-11-12 00:13:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1905 transitions. [2023-11-12 00:13:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-12 00:13:16,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:16,807 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] [2023-11-12 00:13:16,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:13:17,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:17,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:17,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash 68988443, now seen corresponding path program 1 times [2023-11-12 00:13:17,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:17,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788589282] [2023-11-12 00:13:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:17,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:17,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:17,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209367693] [2023-11-12 00:13:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:17,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:17,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:17,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:17,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:13:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:18,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:13:18,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:13:18,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:13:18,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:18,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788589282] [2023-11-12 00:13:18,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:18,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209367693] [2023-11-12 00:13:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209367693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:18,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:18,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:13:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478289924] [2023-11-12 00:13:18,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:18,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:13:18,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:13:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:13:18,258 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) [2023-11-12 00:13:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:19,458 INFO L93 Difference]: Finished difference Result 2704 states and 3894 transitions. [2023-11-12 00:13:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:13:19,459 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 [2023-11-12 00:13:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:19,470 INFO L225 Difference]: With dead ends: 2704 [2023-11-12 00:13:19,471 INFO L226 Difference]: Without dead ends: 1396 [2023-11-12 00:13:19,478 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 [2023-11-12 00:13:19,479 INFO L413 NwaCegarLoop]: 1625 mSDtfsCounter, 227 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:19,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 3168 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:13:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2023-11-12 00:13:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1326. [2023-11-12 00:13:19,550 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) [2023-11-12 00:13:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1905 transitions. [2023-11-12 00:13:19,561 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1905 transitions. Word has length 158 [2023-11-12 00:13:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:19,562 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 1905 transitions. [2023-11-12 00:13:19,562 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) [2023-11-12 00:13:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1905 transitions. [2023-11-12 00:13:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-12 00:13:19,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:19,572 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] [2023-11-12 00:13:19,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:19,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:19,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:19,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1227235006, now seen corresponding path program 1 times [2023-11-12 00:13:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:19,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562925651] [2023-11-12 00:13:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:19,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443030238] [2023-11-12 00:13:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:19,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:19,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:19,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:19,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:13:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:21,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:13:21,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:13:21,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:13:21,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:21,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562925651] [2023-11-12 00:13:21,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:21,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443030238] [2023-11-12 00:13:21,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443030238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:13:21,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:13:21,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:13:21,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155447237] [2023-11-12 00:13:21,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:21,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:13:21,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:13:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:13:21,281 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) [2023-11-12 00:13:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:23,602 INFO L93 Difference]: Finished difference Result 2780 states and 4010 transitions. [2023-11-12 00:13:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:13:23,606 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 [2023-11-12 00:13:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:23,618 INFO L225 Difference]: With dead ends: 2780 [2023-11-12 00:13:23,618 INFO L226 Difference]: Without dead ends: 1472 [2023-11-12 00:13:23,624 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 [2023-11-12 00:13:23,626 INFO L413 NwaCegarLoop]: 1660 mSDtfsCounter, 287 mSDsluCounter, 6042 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 7702 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:23,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 7702 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-12 00:13:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2023-11-12 00:13:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1334. [2023-11-12 00:13:23,701 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) [2023-11-12 00:13:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1916 transitions. [2023-11-12 00:13:23,709 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1916 transitions. Word has length 196 [2023-11-12 00:13:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:23,711 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1916 transitions. [2023-11-12 00:13:23,711 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) [2023-11-12 00:13:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1916 transitions. [2023-11-12 00:13:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-12 00:13:23,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:23,722 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] [2023-11-12 00:13:23,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:23,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:23,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 772030550, now seen corresponding path program 1 times [2023-11-12 00:13:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:23,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865711374] [2023-11-12 00:13:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:24,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115473325] [2023-11-12 00:13:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:24,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:24,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:24,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:24,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b6d769-32fa-457e-a012-b966acfee9ae/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:13:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:25,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:13:25,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:25,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 00:13:25,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-12 00:13:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:13:25,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:26,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2023-11-12 00:13:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-12 00:13:26,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:26,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865711374] [2023-11-12 00:13:26,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:26,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115473325] [2023-11-12 00:13:26,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115473325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:26,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685262208] [2023-11-12 00:13:26,690 INFO L159 IcfgInterpreter]: Started Sifa with 162 locations of interest [2023-11-12 00:13:26,691 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:26,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:26,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:26,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs