./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--dmfe.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--dmfe.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh --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 246ceae3084839b9b339f99ac0b8607f0cf18f3fcdd140edc02c2b8d150b0ed6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:13:38,907 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:13:38,974 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 16:13:38,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:13:38,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:13:39,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:13:39,002 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:13:39,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:13:39,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:13:39,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:13:39,005 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:13:39,005 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:13:39,006 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:13:39,006 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:13:39,007 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:13:39,007 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:13:39,008 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:13:39,008 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:13:39,009 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:13:39,010 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:13:39,010 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:13:39,011 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:13:39,012 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:13:39,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:13:39,012 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:13:39,013 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:13:39,013 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:13:39,014 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:13:39,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:13:39,015 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:13:39,016 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:13:39,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:13:39,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:13:39,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:13:39,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:13:39,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:13:39,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:13:39,018 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:13:39,018 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:13:39,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:13:39,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:13:39,019 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:13:39,019 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:13:39,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:13:39,019 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_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246ceae3084839b9b339f99ac0b8607f0cf18f3fcdd140edc02c2b8d150b0ed6 [2023-12-02 16:13:39,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:13:39,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:13:39,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:13:39,242 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:13:39,243 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:13:39,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--dmfe.ko-entry_point.cil.out.i [2023-12-02 16:13:41,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:13:42,403 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:13:42,404 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--dmfe.ko-entry_point.cil.out.i [2023-12-02 16:13:42,442 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/data/cd3355709/345758ec6cc24db581d73fa5035667af/FLAG351544f06 [2023-12-02 16:13:42,456 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/data/cd3355709/345758ec6cc24db581d73fa5035667af [2023-12-02 16:13:42,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:13:42,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:13:42,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:13:42,462 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:13:42,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:13:42,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:13:42" (1/1) ... [2023-12-02 16:13:42,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e5d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:42, skipping insertion in model container [2023-12-02 16:13:42,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:13:42" (1/1) ... [2023-12-02 16:13:42,616 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:13:44,216 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_64f3e698-4466-4ad7-8a19-fc9446ae39b0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--dmfe.ko-entry_point.cil.out.i[261928,261941] [2023-12-02 16:13:44,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:13:44,312 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:13:44,420 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5603] [2023-12-02 16:13:44,437 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/asm-generic/dma-mapping-common.h"), "i" (19), "i" (12UL)); [5934-5935] [2023-12-02 16:13:44,438 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/asm-generic/dma-mapping-common.h"), "i" (36), "i" (12UL)); [5963-5964] [2023-12-02 16:13:44,490 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [7206] [2023-12-02 16:13:44,501 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [7495] [2023-12-02 16:13:44,582 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_64f3e698-4466-4ad7-8a19-fc9446ae39b0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--dmfe.ko-entry_point.cil.out.i[261928,261941] [2023-12-02 16:13:44,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:13:44,702 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:13:44,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44 WrapperNode [2023-12-02 16:13:44,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:13:44,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:13:44,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:13:44,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:13:44,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:44,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:44,962 INFO L138 Inliner]: procedures = 236, calls = 1628, calls flagged for inlining = 116, calls inlined = 113, statements flattened = 5207 [2023-12-02 16:13:44,962 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:13:44,963 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:13:44,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:13:44,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:13:44,973 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:44,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,148 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:13:45,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:13:45,197 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:13:45,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:13:45,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (1/1) ... [2023-12-02 16:13:45,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:13:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:13:45,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:13:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:13:45,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_shutdown_3 [2023-12-02 16:13:45,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_shutdown_3 [2023-12-02 16:13:45,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 16:13:45,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 16:13:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2023-12-02 16:13:45,304 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2023-12-02 16:13:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 16:13:45,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 16:13:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 16:13:45,304 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 16:13:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2023-12-02 16:13:45,304 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2023-12-02 16:13:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_set_filter_mode [2023-12-02 16:13:45,305 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_set_filter_mode [2023-12-02 16:13:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-12-02 16:13:45,305 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-12-02 16:13:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2023-12-02 16:13:45,305 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2023-12-02 16:13:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-12-02 16:13:45,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-12-02 16:13:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 16:13:45,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 16:13:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_resume [2023-12-02 16:13:45,306 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_resume [2023-12-02 16:13:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 16:13:45,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 16:13:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_phy_write_1bit [2023-12-02 16:13:45,307 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_phy_write_1bit [2023-12-02 16:13:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2023-12-02 16:13:45,307 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2023-12-02 16:13:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2023-12-02 16:13:45,307 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2023-12-02 16:13:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2023-12-02 16:13:45,307 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2023-12-02 16:13:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2023-12-02 16:13:45,307 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2023-12-02 16:13:45,308 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2023-12-02 16:13:45,308 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2023-12-02 16:13:45,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 16:13:45,308 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 16:13:45,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:13:45,308 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:13:45,308 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2023-12-02 16:13:45,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2023-12-02 16:13:45,308 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-12-02 16:13:45,308 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-12-02 16:13:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2023-12-02 16:13:45,309 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2023-12-02 16:13:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2023-12-02 16:13:45,309 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2023-12-02 16:13:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure send_filter_frame [2023-12-02 16:13:45,309 INFO L138 BoogieDeclarations]: Found implementation of procedure send_filter_frame [2023-12-02 16:13:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_reuse_skb [2023-12-02 16:13:45,309 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_reuse_skb [2023-12-02 16:13:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure dev_trans_start [2023-12-02 16:13:45,310 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_trans_start [2023-12-02 16:13:45,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:13:45,310 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2023-12-02 16:13:45,310 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2023-12-02 16:13:45,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:13:45,310 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2023-12-02 16:13:45,310 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2023-12-02 16:13:45,310 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-12-02 16:13:45,310 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-12-02 16:13:45,311 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-12-02 16:13:45,311 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-12-02 16:13:45,311 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2023-12-02 16:13:45,311 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2023-12-02 16:13:45,311 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-12-02 16:13:45,311 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-12-02 16:13:45,311 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 16:13:45,311 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 16:13:45,311 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2023-12-02 16:13:45,311 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2023-12-02 16:13:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_phy_read_1bit [2023-12-02 16:13:45,312 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_phy_read_1bit [2023-12-02 16:13:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:13:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 16:13:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 16:13:45,312 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 16:13:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_init_dm910x [2023-12-02 16:13:45,312 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_init_dm910x [2023-12-02 16:13:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2023-12-02 16:13:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2023-12-02 16:13:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-12-02 16:13:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-12-02 16:13:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure poll_dmfe [2023-12-02 16:13:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_dmfe [2023-12-02 16:13:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_phy_write [2023-12-02 16:13:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_phy_write [2023-12-02 16:13:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-12-02 16:13:45,313 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-12-02 16:13:45,313 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_kfree_skb_any [2023-12-02 16:13:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_kfree_skb_any [2023-12-02 16:13:45,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 16:13:45,314 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2023-12-02 16:13:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2023-12-02 16:13:45,314 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2023-12-02 16:13:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2023-12-02 16:13:45,314 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2023-12-02 16:13:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2023-12-02 16:13:45,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 16:13:45,314 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_remove_one [2023-12-02 16:13:45,315 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_remove_one [2023-12-02 16:13:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:13:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure dm9132_id_table [2023-12-02 16:13:45,315 INFO L138 BoogieDeclarations]: Found implementation of procedure dm9132_id_table [2023-12-02 16:13:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2023-12-02 16:13:45,315 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2023-12-02 16:13:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2023-12-02 16:13:45,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2023-12-02 16:13:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-12-02 16:13:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-12-02 16:13:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_interrupt [2023-12-02 16:13:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_interrupt [2023-12-02 16:13:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2023-12-02 16:13:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2023-12-02 16:13:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure update_cr6 [2023-12-02 16:13:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure update_cr6 [2023-12-02 16:13:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:13:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 16:13:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 16:13:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 16:13:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 16:13:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure cal_CRC [2023-12-02 16:13:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure cal_CRC [2023-12-02 16:13:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure srom_clk_write [2023-12-02 16:13:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_clk_write [2023-12-02 16:13:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:13:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-12-02 16:13:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-12-02 16:13:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:13:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_rx_buffer [2023-12-02 16:13:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_rx_buffer [2023-12-02 16:13:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure __le32_to_cpup [2023-12-02 16:13:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __le32_to_cpup [2023-12-02 16:13:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-12-02 16:13:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-12-02 16:13:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:13:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_dword [2023-12-02 16:13:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_dword [2023-12-02 16:13:45,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-12-02 16:13:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-12-02 16:13:45,319 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2023-12-02 16:13:45,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2023-12-02 16:13:45,319 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_early_3 [2023-12-02 16:13:45,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_early_3 [2023-12-02 16:13:45,319 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_phy_read [2023-12-02 16:13:45,319 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_phy_read [2023-12-02 16:13:45,319 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2023-12-02 16:13:45,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2023-12-02 16:13:45,319 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_free_rxbuffer [2023-12-02 16:13:45,319 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_free_rxbuffer [2023-12-02 16:13:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2023-12-02 16:13:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2023-12-02 16:13:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2023-12-02 16:13:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2023-12-02 16:13:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-12-02 16:13:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-12-02 16:13:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:13:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:13:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:13:45,902 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:13:45,905 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:13:46,182 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 16:13:49,376 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:13:52,089 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:13:52,089 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 16:13:52,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:13:52 BoogieIcfgContainer [2023-12-02 16:13:52,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:13:52,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:13:52,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:13:52,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:13:52,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:13:42" (1/3) ... [2023-12-02 16:13:52,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25734711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:13:52, skipping insertion in model container [2023-12-02 16:13:52,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:13:44" (2/3) ... [2023-12-02 16:13:52,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25734711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:13:52, skipping insertion in model container [2023-12-02 16:13:52,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:13:52" (3/3) ... [2023-12-02 16:13:52,100 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--dmfe.ko-entry_point.cil.out.i [2023-12-02 16:13:52,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:13:52,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:13:52,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:13:52,204 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;@259243ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:13:52,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:13:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 1135 states, 692 states have (on average 1.333815028901734) internal successors, (923), 715 states have internal predecessors, (923), 369 states have call successors, (369), 73 states have call predecessors, (369), 72 states have return successors, (362), 356 states have call predecessors, (362), 362 states have call successors, (362) [2023-12-02 16:13:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 16:13:52,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:13:52,249 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-02 16:13:52,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:13:52,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:13:52,255 INFO L85 PathProgramCache]: Analyzing trace with hash 479019325, now seen corresponding path program 1 times [2023-12-02 16:13:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:13:52,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360580903] [2023-12-02 16:13:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:13:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:13:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:13:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:13:53,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:13:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360580903] [2023-12-02 16:13:53,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360580903] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:13:53,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:13:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:13:53,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141836329] [2023-12-02 16:13:53,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:13:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:13:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:13:53,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:13:53,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:13:53,114 INFO L87 Difference]: Start difference. First operand has 1135 states, 692 states have (on average 1.333815028901734) internal successors, (923), 715 states have internal predecessors, (923), 369 states have call successors, (369), 73 states have call predecessors, (369), 72 states have return successors, (362), 356 states have call predecessors, (362), 362 states have call successors, (362) Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:13:55,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:14:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:00,166 INFO L93 Difference]: Finished difference Result 3370 states and 4957 transitions. [2023-12-02 16:14:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:14:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 119 [2023-12-02 16:14:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:00,199 INFO L225 Difference]: With dead ends: 3370 [2023-12-02 16:14:00,199 INFO L226 Difference]: Without dead ends: 2220 [2023-12-02 16:14:00,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:14:00,214 INFO L413 NwaCegarLoop]: 1958 mSDtfsCounter, 1630 mSDsluCounter, 5316 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 7274 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:00,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 7274 Invalid, 1116 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-12-02 16:14:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2023-12-02 16:14:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2205. [2023-12-02 16:14:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 1353 states have (on average 1.3215077605321508) internal successors, (1788), 1386 states have internal predecessors, (1788), 710 states have call successors, (710), 142 states have call predecessors, (710), 141 states have return successors, (709), 692 states have call predecessors, (709), 709 states have call successors, (709) [2023-12-02 16:14:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 3207 transitions. [2023-12-02 16:14:00,423 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 3207 transitions. Word has length 119 [2023-12-02 16:14:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:00,424 INFO L495 AbstractCegarLoop]: Abstraction has 2205 states and 3207 transitions. [2023-12-02 16:14:00,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:14:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 3207 transitions. [2023-12-02 16:14:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-02 16:14:00,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:00,436 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-02 16:14:00,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:14:00,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:14:00,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:00,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1380750565, now seen corresponding path program 1 times [2023-12-02 16:14:00,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:00,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402132845] [2023-12-02 16:14:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:00,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:00,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402132845] [2023-12-02 16:14:00,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402132845] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:14:00,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:14:00,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:14:00,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103950088] [2023-12-02 16:14:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:14:00,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:14:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:14:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:14:00,796 INFO L87 Difference]: Start difference. First operand 2205 states and 3207 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:14:04,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:14:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:07,720 INFO L93 Difference]: Finished difference Result 4625 states and 6691 transitions. [2023-12-02 16:14:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:14:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 120 [2023-12-02 16:14:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:07,748 INFO L225 Difference]: With dead ends: 4625 [2023-12-02 16:14:07,748 INFO L226 Difference]: Without dead ends: 3315 [2023-12-02 16:14:07,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:14:07,758 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 1598 mSDsluCounter, 4527 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 6104 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:07,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 6104 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-12-02 16:14:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2023-12-02 16:14:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3295. [2023-12-02 16:14:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 2025 states have (on average 1.3219753086419752) internal successors, (2677), 2072 states have internal predecessors, (2677), 1058 states have call successors, (1058), 212 states have call predecessors, (1058), 211 states have return successors, (1057), 1034 states have call predecessors, (1057), 1057 states have call successors, (1057) [2023-12-02 16:14:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 4792 transitions. [2023-12-02 16:14:07,978 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 4792 transitions. Word has length 120 [2023-12-02 16:14:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:07,978 INFO L495 AbstractCegarLoop]: Abstraction has 3295 states and 4792 transitions. [2023-12-02 16:14:07,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:14:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 4792 transitions. [2023-12-02 16:14:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 16:14:07,989 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:07,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-02 16:14:07,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:14:07,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:14:07,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1295774426, now seen corresponding path program 1 times [2023-12-02 16:14:07,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:07,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831868697] [2023-12-02 16:14:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:07,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:08,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:08,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831868697] [2023-12-02 16:14:08,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831868697] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:14:08,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:14:08,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:14:08,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242753921] [2023-12-02 16:14:08,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:14:08,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:14:08,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:08,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:14:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:14:08,444 INFO L87 Difference]: Start difference. First operand 3295 states and 4792 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:14:10,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:14:11,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:14:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:15,991 INFO L93 Difference]: Finished difference Result 5720 states and 8278 transitions. [2023-12-02 16:14:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:14:15,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 121 [2023-12-02 16:14:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:16,013 INFO L225 Difference]: With dead ends: 5720 [2023-12-02 16:14:16,013 INFO L226 Difference]: Without dead ends: 3319 [2023-12-02 16:14:16,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:14:16,026 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 1596 mSDsluCounter, 4527 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 6104 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:16,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 6104 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-12-02 16:14:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2023-12-02 16:14:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3299. [2023-12-02 16:14:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 2029 states have (on average 1.3213405618531295) internal successors, (2681), 2075 states have internal predecessors, (2681), 1057 states have call successors, (1057), 213 states have call predecessors, (1057), 212 states have return successors, (1056), 1034 states have call predecessors, (1056), 1056 states have call successors, (1056) [2023-12-02 16:14:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 4794 transitions. [2023-12-02 16:14:16,204 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 4794 transitions. Word has length 121 [2023-12-02 16:14:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:16,205 INFO L495 AbstractCegarLoop]: Abstraction has 3299 states and 4794 transitions. [2023-12-02 16:14:16,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:14:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 4794 transitions. [2023-12-02 16:14:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 16:14:16,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:16,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-02 16:14:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:14:16,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:14:16,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1431447336, now seen corresponding path program 1 times [2023-12-02 16:14:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:16,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181576239] [2023-12-02 16:14:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:16,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:16,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:16,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181576239] [2023-12-02 16:14:16,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181576239] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:14:16,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:14:16,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:14:16,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143173680] [2023-12-02 16:14:16,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:14:16,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:14:16,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:14:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:14:16,514 INFO L87 Difference]: Start difference. First operand 3299 states and 4794 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:14:17,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:14:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:22,962 INFO L93 Difference]: Finished difference Result 5715 states and 8266 transitions. [2023-12-02 16:14:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:14:22,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 122 [2023-12-02 16:14:22,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:22,981 INFO L225 Difference]: With dead ends: 5715 [2023-12-02 16:14:22,981 INFO L226 Difference]: Without dead ends: 3309 [2023-12-02 16:14:22,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:14:22,991 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 1594 mSDsluCounter, 4527 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 6104 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:22,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 6104 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-12-02 16:14:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2023-12-02 16:14:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3292. [2023-12-02 16:14:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 2024 states have (on average 1.3206521739130435) internal successors, (2673), 2069 states have internal predecessors, (2673), 1055 states have call successors, (1055), 213 states have call predecessors, (1055), 212 states have return successors, (1054), 1033 states have call predecessors, (1054), 1054 states have call successors, (1054) [2023-12-02 16:14:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 4782 transitions. [2023-12-02 16:14:23,139 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 4782 transitions. Word has length 122 [2023-12-02 16:14:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:23,140 INFO L495 AbstractCegarLoop]: Abstraction has 3292 states and 4782 transitions. [2023-12-02 16:14:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:14:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 4782 transitions. [2023-12-02 16:14:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 16:14:23,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:23,148 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-02 16:14:23,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:14:23,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:14:23,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1347809338, now seen corresponding path program 1 times [2023-12-02 16:14:23,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:23,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541769416] [2023-12-02 16:14:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:23,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-12-02 16:14:23,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:23,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541769416] [2023-12-02 16:14:23,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541769416] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:14:23,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:14:23,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:14:23,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144676554] [2023-12-02 16:14:23,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:14:23,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:14:23,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:14:23,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:14:23,364 INFO L87 Difference]: Start difference. First operand 3292 states and 4782 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:14:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:26,000 INFO L93 Difference]: Finished difference Result 9186 states and 13303 transitions. [2023-12-02 16:14:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:14:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2023-12-02 16:14:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:26,039 INFO L225 Difference]: With dead ends: 9186 [2023-12-02 16:14:26,039 INFO L226 Difference]: Without dead ends: 5911 [2023-12-02 16:14:26,055 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 [2023-12-02 16:14:26,056 INFO L413 NwaCegarLoop]: 1449 mSDtfsCounter, 1341 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:26,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 2773 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 16:14:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2023-12-02 16:14:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 5902. [2023-12-02 16:14:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5902 states, 3619 states have (on average 1.3138988670903564) internal successors, (4755), 3693 states have internal predecessors, (4755), 1882 states have call successors, (1882), 401 states have call predecessors, (1882), 400 states have return successors, (1893), 1847 states have call predecessors, (1893), 1881 states have call successors, (1893) [2023-12-02 16:14:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 8530 transitions. [2023-12-02 16:14:26,452 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 8530 transitions. Word has length 130 [2023-12-02 16:14:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:26,452 INFO L495 AbstractCegarLoop]: Abstraction has 5902 states and 8530 transitions. [2023-12-02 16:14:26,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:14:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 8530 transitions. [2023-12-02 16:14:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 16:14:26,459 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:26,459 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:14:26,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:14:26,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:14:26,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1781893618, now seen corresponding path program 1 times [2023-12-02 16:14:26,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:26,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905285563] [2023-12-02 16:14:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-02 16:14:27,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:27,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905285563] [2023-12-02 16:14:27,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905285563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:14:27,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032070002] [2023-12-02 16:14:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:27,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:14:27,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:14:27,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:14:27,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:14:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:28,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 2288 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:14:28,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:14:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:28,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:14:28,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032070002] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:14:28,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:14:28,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 16:14:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269017510] [2023-12-02 16:14:28,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:14:28,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:14:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:14:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:14:28,171 INFO L87 Difference]: Start difference. First operand 5902 states and 8530 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:14:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:37,002 INFO L93 Difference]: Finished difference Result 13879 states and 20051 transitions. [2023-12-02 16:14:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:14:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 132 [2023-12-02 16:14:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:37,063 INFO L225 Difference]: With dead ends: 13879 [2023-12-02 16:14:37,063 INFO L226 Difference]: Without dead ends: 9844 [2023-12-02 16:14:37,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:14:37,083 INFO L413 NwaCegarLoop]: 1653 mSDtfsCounter, 1628 mSDsluCounter, 7996 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 9649 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:37,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 9649 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-12-02 16:14:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9844 states. [2023-12-02 16:14:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9844 to 9781. [2023-12-02 16:14:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9781 states, 5999 states have (on average 1.3148858143023838) internal successors, (7888), 6131 states have internal predecessors, (7888), 3115 states have call successors, (3115), 663 states have call predecessors, (3115), 666 states have return successors, (3144), 3052 states have call predecessors, (3144), 3114 states have call successors, (3144) [2023-12-02 16:14:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9781 states to 9781 states and 14147 transitions. [2023-12-02 16:14:37,773 INFO L78 Accepts]: Start accepts. Automaton has 9781 states and 14147 transitions. Word has length 132 [2023-12-02 16:14:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:37,773 INFO L495 AbstractCegarLoop]: Abstraction has 9781 states and 14147 transitions. [2023-12-02 16:14:37,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:14:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9781 states and 14147 transitions. [2023-12-02 16:14:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-02 16:14:37,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:37,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:14:37,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:14:37,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:14:37,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:14:37,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -9640501, now seen corresponding path program 1 times [2023-12-02 16:14:37,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:37,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144635545] [2023-12-02 16:14:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:38,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144635545] [2023-12-02 16:14:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144635545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:14:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340600830] [2023-12-02 16:14:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:14:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:14:38,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:14:38,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:14:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:39,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 2290 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:14:39,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:14:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:39,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:14:39,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340600830] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:14:39,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:14:39,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 16:14:39,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726505232] [2023-12-02 16:14:39,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:14:39,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:14:39,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:14:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:14:39,529 INFO L87 Difference]: Start difference. First operand 9781 states and 14147 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:14:46,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:14:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:48,987 INFO L93 Difference]: Finished difference Result 21659 states and 31305 transitions. [2023-12-02 16:14:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:14:48,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2023-12-02 16:14:48,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:49,039 INFO L225 Difference]: With dead ends: 21659 [2023-12-02 16:14:49,039 INFO L226 Difference]: Without dead ends: 13745 [2023-12-02 16:14:49,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:14:49,071 INFO L413 NwaCegarLoop]: 1671 mSDtfsCounter, 1628 mSDsluCounter, 8056 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 9727 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:49,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 9727 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-12-02 16:14:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13745 states. [2023-12-02 16:14:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13745 to 13670. [2023-12-02 16:14:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13670 states, 8385 states have (on average 1.3150864639236732) internal successors, (11027), 8581 states have internal predecessors, (11027), 4348 states have call successors, (4348), 925 states have call predecessors, (4348), 936 states have return successors, (4401), 4255 states have call predecessors, (4401), 4347 states have call successors, (4401) [2023-12-02 16:14:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13670 states to 13670 states and 19776 transitions. [2023-12-02 16:14:49,965 INFO L78 Accepts]: Start accepts. Automaton has 13670 states and 19776 transitions. Word has length 133 [2023-12-02 16:14:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:14:49,965 INFO L495 AbstractCegarLoop]: Abstraction has 13670 states and 19776 transitions. [2023-12-02 16:14:49,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:14:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 13670 states and 19776 transitions. [2023-12-02 16:14:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 16:14:49,977 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:14:49,977 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:14:49,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:14:50,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:14:50,178 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:14:50,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:14:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1612336455, now seen corresponding path program 1 times [2023-12-02 16:14:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:14:50,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981627164] [2023-12-02 16:14:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:14:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:50,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:14:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981627164] [2023-12-02 16:14:50,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981627164] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:14:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732272712] [2023-12-02 16:14:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:14:50,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:14:50,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:14:50,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:14:50,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:14:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:14:51,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 2292 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:14:51,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:14:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:14:51,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:14:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732272712] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:14:51,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:14:51,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 16:14:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459600872] [2023-12-02 16:14:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:14:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:14:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:14:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:14:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:14:51,515 INFO L87 Difference]: Start difference. First operand 13670 states and 19776 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:14:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:14:59,775 INFO L93 Difference]: Finished difference Result 29433 states and 42555 transitions. [2023-12-02 16:14:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:14:59,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2023-12-02 16:14:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:14:59,827 INFO L225 Difference]: With dead ends: 29433 [2023-12-02 16:14:59,828 INFO L226 Difference]: Without dead ends: 17630 [2023-12-02 16:14:59,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:14:59,853 INFO L413 NwaCegarLoop]: 1671 mSDtfsCounter, 1628 mSDsluCounter, 8056 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 9727 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:14:59,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 9727 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-12-02 16:14:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17630 states. [2023-12-02 16:15:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17630 to 13672. [2023-12-02 16:15:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13672 states, 8387 states have (on average 1.3150113270537738) internal successors, (11029), 8581 states have internal predecessors, (11029), 4348 states have call successors, (4348), 925 states have call predecessors, (4348), 936 states have return successors, (4401), 4257 states have call predecessors, (4401), 4347 states have call successors, (4401) [2023-12-02 16:15:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13672 states to 13672 states and 19778 transitions. [2023-12-02 16:15:00,545 INFO L78 Accepts]: Start accepts. Automaton has 13672 states and 19778 transitions. Word has length 134 [2023-12-02 16:15:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:15:00,545 INFO L495 AbstractCegarLoop]: Abstraction has 13672 states and 19778 transitions. [2023-12-02 16:15:00,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:15:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 13672 states and 19778 transitions. [2023-12-02 16:15:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-02 16:15:00,552 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:15:00,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:15:00,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:15:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:15:00,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:15:00,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:15:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1424247580, now seen corresponding path program 1 times [2023-12-02 16:15:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:15:00,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587642168] [2023-12-02 16:15:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:15:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:15:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:15:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:15:01,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:15:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587642168] [2023-12-02 16:15:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587642168] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:15:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099318464] [2023-12-02 16:15:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:15:01,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:15:01,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:15:01,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:15:01,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:15:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:15:01,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:15:01,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:15:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:15:01,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:15:01,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099318464] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:15:01,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:15:01,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 16:15:01,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599206133] [2023-12-02 16:15:01,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:15:01,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:15:01,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:15:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:15:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:15:01,952 INFO L87 Difference]: Start difference. First operand 13672 states and 19778 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:15:07,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:15:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:15:10,921 INFO L93 Difference]: Finished difference Result 29439 states and 42561 transitions. [2023-12-02 16:15:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:15:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2023-12-02 16:15:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:15:10,966 INFO L225 Difference]: With dead ends: 29439 [2023-12-02 16:15:10,966 INFO L226 Difference]: Without dead ends: 17634 [2023-12-02 16:15:10,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:15:10,993 INFO L413 NwaCegarLoop]: 1671 mSDtfsCounter, 1628 mSDsluCounter, 8056 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 9727 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:15:10,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 9727 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-12-02 16:15:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17634 states. [2023-12-02 16:15:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17634 to 13674. [2023-12-02 16:15:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13674 states, 8389 states have (on average 1.3149362260102515) internal successors, (11031), 8581 states have internal predecessors, (11031), 4348 states have call successors, (4348), 925 states have call predecessors, (4348), 936 states have return successors, (4401), 4259 states have call predecessors, (4401), 4347 states have call successors, (4401) [2023-12-02 16:15:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13674 states to 13674 states and 19780 transitions. [2023-12-02 16:15:11,706 INFO L78 Accepts]: Start accepts. Automaton has 13674 states and 19780 transitions. Word has length 135 [2023-12-02 16:15:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:15:11,707 INFO L495 AbstractCegarLoop]: Abstraction has 13674 states and 19780 transitions. [2023-12-02 16:15:11,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:15:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13674 states and 19780 transitions. [2023-12-02 16:15:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 16:15:11,718 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:15:11,718 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:15:11,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:15:11,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:15:11,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:15:11,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:15:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash -61277264, now seen corresponding path program 1 times [2023-12-02 16:15:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:15:11,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871946304] [2023-12-02 16:15:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:15:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:15:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:15:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-02 16:15:12,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:15:12,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871946304] [2023-12-02 16:15:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871946304] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:15:12,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710772164] [2023-12-02 16:15:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:15:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:15:12,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:15:12,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:15:12,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64f3e698-4466-4ad7-8a19-fc9446ae39b0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:15:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:15:13,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 2355 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:15:13,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:15:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-02 16:15:13,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:15:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-12-02 16:15:13,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710772164] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:15:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019187336] [2023-12-02 16:15:13,958 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-12-02 16:15:13,958 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:15:13,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:15:13,967 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:15:13,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:19:58,651 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_memset with input of size 191 for LOIs [2023-12-02 16:19:59,023 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 1783 for LOIs [2023-12-02 16:21:39,017 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 1808 for LOIs [2023-12-02 16:21:52,046 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 160 for LOIs [2023-12-02 16:21:52,102 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 191 for LOIs [2023-12-02 16:21:52,174 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:23:48,262 WARN L293 SmtUtils]: Spent 1.91m on a formula simplification. DAG size of input: 1773 DAG size of output: 1769 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:24:11,329 WARN L293 SmtUtils]: Spent 22.18s on a formula simplification. DAG size of input: 1783 DAG size of output: 151 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:24:37,357 WARN L293 SmtUtils]: Spent 24.99s on a formula simplification. DAG size of input: 1804 DAG size of output: 174 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:25:03,490 WARN L293 SmtUtils]: Spent 24.93s on a formula simplification. DAG size of input: 1808 DAG size of output: 179 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:25:29,341 WARN L293 SmtUtils]: Spent 24.55s on a formula simplification. DAG size of input: 1810 DAG size of output: 181 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:26:34,789 WARN L293 SmtUtils]: Spent 59.34s on a formula simplification. DAG size of input: 2140 DAG size of output: 2136 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:27:37,082 WARN L293 SmtUtils]: Spent 1.00m on a formula simplification. DAG size of input: 2144 DAG size of output: 2140 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)