./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:56,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:56,747 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:36:56,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:56,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:56,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:56,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:56,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:56,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:56,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:56,784 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:56,784 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:56,785 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:56,785 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:56,786 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:56,787 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:56,787 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:56,788 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:56,788 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:56,789 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:56,790 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:56,790 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:56,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:56,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:56,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:56,793 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:56,794 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:56,794 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:56,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:56,795 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:56,796 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:56,796 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:56,797 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:56,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:56,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:56,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:56,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:56,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:56,800 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:56,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:56,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:56,801 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:56,802 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:56,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:56,802 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_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b [2023-11-23 20:36:57,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:57,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:57,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:57,174 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:57,175 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:57,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2023-11-23 20:37:00,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:37:00,933 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:37:00,934 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2023-11-23 20:37:00,977 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/data/08e75b488/f6c3d79f5d384f2ab00a671b348c7897/FLAGf49f3143b [2023-11-23 20:37:00,994 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/data/08e75b488/f6c3d79f5d384f2ab00a671b348c7897 [2023-11-23 20:37:00,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:37:01,003 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:37:01,009 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:01,009 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:37:01,014 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:37:01,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:00" (1/1) ... [2023-11-23 20:37:01,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@354862ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:01, skipping insertion in model container [2023-11-23 20:37:01,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:00" (1/1) ... [2023-11-23 20:37:01,186 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:37:02,239 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_ba099a21-2a6d-416f-918d-adf1a868eff7/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2023-11-23 20:37:02,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:02,402 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:37:02,494 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [2827] [2023-11-23 20:37:02,497 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0; sete %1": "+m" (v->counter), "=qm" (c): : "memory"); [2834-2835] [2023-11-23 20:37:02,712 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_ba099a21-2a6d-416f-918d-adf1a868eff7/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2023-11-23 20:37:02,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:02,786 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:37:02,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02 WrapperNode [2023-11-23 20:37:02,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:02,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:02,788 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:37:02,788 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:37:02,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:02,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:02,988 INFO L138 Inliner]: procedures = 144, calls = 819, calls flagged for inlining = 50, calls inlined = 42, statements flattened = 1710 [2023-11-23 20:37:02,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:02,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:37:02,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:37:02,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:37:03,000 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:37:03,247 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:37:03,248 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:37:03,248 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:37:03,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (1/1) ... [2023-11-23 20:37:03,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:03,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:03,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:37:03,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:37:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-23 20:37:03,346 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-23 20:37:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-23 20:37:03,346 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-23 20:37:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-23 20:37:03,348 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-23 20:37:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pt_mutex [2023-11-23 20:37:03,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pt_mutex [2023-11-23 20:37:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-23 20:37:03,350 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-23 20:37:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:37:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2023-11-23 20:37:03,351 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2023-11-23 20:37:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-23 20:37:03,351 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-23 20:37:03,352 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2023-11-23 20:37:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2023-11-23 20:37:03,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:37:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:37:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2023-11-23 20:37:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2023-11-23 20:37:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2023-11-23 20:37:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2023-11-23 20:37:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2023-11-23 20:37:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2023-11-23 20:37:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:37:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 20:37:03,358 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 20:37:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2023-11-23 20:37:03,358 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2023-11-23 20:37:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:37:03,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:37:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:37:03,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:37:03,359 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2023-11-23 20:37:03,360 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2023-11-23 20:37:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:37:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2023-11-23 20:37:03,360 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2023-11-23 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pt_mutex [2023-11-23 20:37:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pt_mutex [2023-11-23 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 20:37:03,361 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2023-11-23 20:37:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2023-11-23 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-23 20:37:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-23 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:37:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_17 [2023-11-23 20:37:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_17 [2023-11-23 20:37:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2023-11-23 20:37:03,363 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2023-11-23 20:37:03,363 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-23 20:37:03,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-23 20:37:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:37:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:37:03,364 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2023-11-23 20:37:03,365 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2023-11-23 20:37:03,365 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2023-11-23 20:37:03,366 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2023-11-23 20:37:03,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:37:03,367 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2023-11-23 20:37:03,368 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2023-11-23 20:37:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2023-11-23 20:37:03,369 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2023-11-23 20:37:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2023-11-23 20:37:03,369 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2023-11-23 20:37:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2023-11-23 20:37:03,369 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2023-11-23 20:37:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:37:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:37:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-23 20:37:03,372 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-23 20:37:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-23 20:37:03,372 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-23 20:37:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 20:37:03,373 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 20:37:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:37:03,373 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:37:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2023-11-23 20:37:03,373 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2023-11-23 20:37:03,374 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-23 20:37:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-23 20:37:03,374 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2023-11-23 20:37:03,375 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2023-11-23 20:37:03,375 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2023-11-23 20:37:03,376 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2023-11-23 20:37:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:37:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2023-11-23 20:37:03,376 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2023-11-23 20:37:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure device_create [2023-11-23 20:37:03,377 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create [2023-11-23 20:37:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2023-11-23 20:37:03,377 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2023-11-23 20:37:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 20:37:03,377 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 20:37:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:37:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:37:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2023-11-23 20:37:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2023-11-23 20:37:03,892 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:37:03,895 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:37:11,424 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:12,394 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:12,395 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 20:37:12,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:12 BoogieIcfgContainer [2023-11-23 20:37:12,397 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:12,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:12,401 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:12,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:12,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:00" (1/3) ... [2023-11-23 20:37:12,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78504886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:12, skipping insertion in model container [2023-11-23 20:37:12,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:02" (2/3) ... [2023-11-23 20:37:12,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78504886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:12, skipping insertion in model container [2023-11-23 20:37:12,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:12" (3/3) ... [2023-11-23 20:37:12,411 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2023-11-23 20:37:12,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:12,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:37:12,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:12,542 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;@13ac0a05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:12,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:37:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 612 states, 379 states have (on average 1.358839050131926) internal successors, (515), 400 states have internal predecessors, (515), 191 states have call successors, (191), 44 states have call predecessors, (191), 44 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-23 20:37:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:37:12,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:12,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:12,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:12,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1922284666, now seen corresponding path program 1 times [2023-11-23 20:37:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:12,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97084170] [2023-11-23 20:37:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:13,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:13,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97084170] [2023-11-23 20:37:13,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97084170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:13,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:13,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:13,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612223260] [2023-11-23 20:37:13,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:13,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:13,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:13,265 INFO L87 Difference]: Start difference. First operand has 612 states, 379 states have (on average 1.358839050131926) internal successors, (515), 400 states have internal predecessors, (515), 191 states have call successors, (191), 44 states have call predecessors, (191), 44 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:15,935 INFO L93 Difference]: Finished difference Result 1503 states and 2237 transitions. [2023-11-23 20:37:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:15,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-23 20:37:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:15,968 INFO L225 Difference]: With dead ends: 1503 [2023-11-23 20:37:15,968 INFO L226 Difference]: Without dead ends: 888 [2023-11-23 20:37:15,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:15,983 INFO L413 NwaCegarLoop]: 966 mSDtfsCounter, 417 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:15,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1696 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 20:37:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2023-11-23 20:37:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 866. [2023-11-23 20:37:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 532 states have (on average 1.349624060150376) internal successors, (718), 553 states have internal predecessors, (718), 266 states have call successors, (266), 68 states have call predecessors, (266), 67 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) [2023-11-23 20:37:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1244 transitions. [2023-11-23 20:37:16,125 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1244 transitions. Word has length 16 [2023-11-23 20:37:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:16,127 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1244 transitions. [2023-11-23 20:37:16,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1244 transitions. [2023-11-23 20:37:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:37:16,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:16,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:16,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:37:16,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:16,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1006012432, now seen corresponding path program 1 times [2023-11-23 20:37:16,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:16,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111272401] [2023-11-23 20:37:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:16,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:16,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111272401] [2023-11-23 20:37:16,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111272401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:16,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:16,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:37:16,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354840468] [2023-11-23 20:37:16,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:16,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:16,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:16,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:16,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:16,329 INFO L87 Difference]: Start difference. First operand 866 states and 1244 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:17,485 INFO L93 Difference]: Finished difference Result 1731 states and 2487 transitions. [2023-11-23 20:37:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 20:37:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:17,495 INFO L225 Difference]: With dead ends: 1731 [2023-11-23 20:37:17,496 INFO L226 Difference]: Without dead ends: 866 [2023-11-23 20:37:17,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:17,502 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 855 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:17,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 753 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 20:37:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-23 20:37:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2023-11-23 20:37:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 532 states have (on average 1.3458646616541354) internal successors, (716), 553 states have internal predecessors, (716), 266 states have call successors, (266), 68 states have call predecessors, (266), 67 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) [2023-11-23 20:37:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1242 transitions. [2023-11-23 20:37:17,581 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1242 transitions. Word has length 15 [2023-11-23 20:37:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:17,581 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1242 transitions. [2023-11-23 20:37:17,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1242 transitions. [2023-11-23 20:37:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:37:17,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:17,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:17,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:37:17,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:17,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash 598689808, now seen corresponding path program 1 times [2023-11-23 20:37:17,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:17,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689612114] [2023-11-23 20:37:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:17,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689612114] [2023-11-23 20:37:17,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689612114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:17,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:17,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744795109] [2023-11-23 20:37:17,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:17,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:17,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:17,809 INFO L87 Difference]: Start difference. First operand 866 states and 1242 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:19,865 INFO L93 Difference]: Finished difference Result 1922 states and 2737 transitions. [2023-11-23 20:37:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-23 20:37:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:19,881 INFO L225 Difference]: With dead ends: 1922 [2023-11-23 20:37:19,881 INFO L226 Difference]: Without dead ends: 1057 [2023-11-23 20:37:19,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:19,894 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 409 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:19,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1553 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 20:37:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2023-11-23 20:37:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1057. [2023-11-23 20:37:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 646 states have (on average 1.3328173374613004) internal successors, (861), 672 states have internal predecessors, (861), 319 states have call successors, (319), 92 states have call predecessors, (319), 91 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-11-23 20:37:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1493 transitions. [2023-11-23 20:37:20,027 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1493 transitions. Word has length 17 [2023-11-23 20:37:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:20,028 INFO L495 AbstractCegarLoop]: Abstraction has 1057 states and 1493 transitions. [2023-11-23 20:37:20,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1493 transitions. [2023-11-23 20:37:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:37:20,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:20,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:20,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:37:20,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:20,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -803773332, now seen corresponding path program 1 times [2023-11-23 20:37:20,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:20,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128510941] [2023-11-23 20:37:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:20,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:20,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128510941] [2023-11-23 20:37:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128510941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:20,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:20,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:20,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481421330] [2023-11-23 20:37:20,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:20,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:20,264 INFO L87 Difference]: Start difference. First operand 1057 states and 1493 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:22,483 INFO L93 Difference]: Finished difference Result 2128 states and 3012 transitions. [2023-11-23 20:37:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-23 20:37:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:22,493 INFO L225 Difference]: With dead ends: 2128 [2023-11-23 20:37:22,493 INFO L226 Difference]: Without dead ends: 1081 [2023-11-23 20:37:22,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:22,500 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 12 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:22,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1498 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 20:37:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2023-11-23 20:37:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1059. [2023-11-23 20:37:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 648 states have (on average 1.3317901234567902) internal successors, (863), 674 states have internal predecessors, (863), 319 states have call successors, (319), 92 states have call predecessors, (319), 91 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-11-23 20:37:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1495 transitions. [2023-11-23 20:37:22,605 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1495 transitions. Word has length 24 [2023-11-23 20:37:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:22,605 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1495 transitions. [2023-11-23 20:37:22,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1495 transitions. [2023-11-23 20:37:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 20:37:22,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:22,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:22,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:37:22,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:22,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:22,609 INFO L85 PathProgramCache]: Analyzing trace with hash -727163350, now seen corresponding path program 1 times [2023-11-23 20:37:22,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:22,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250602763] [2023-11-23 20:37:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:22,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:37:22,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250602763] [2023-11-23 20:37:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250602763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:22,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:22,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:22,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425372694] [2023-11-23 20:37:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:22,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:22,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:22,820 INFO L87 Difference]: Start difference. First operand 1059 states and 1495 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:24,881 INFO L93 Difference]: Finished difference Result 2126 states and 3006 transitions. [2023-11-23 20:37:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:24,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-23 20:37:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:24,890 INFO L225 Difference]: With dead ends: 2126 [2023-11-23 20:37:24,890 INFO L226 Difference]: Without dead ends: 1077 [2023-11-23 20:37:24,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:24,897 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 12 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:24,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1496 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 20:37:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2023-11-23 20:37:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1069. [2023-11-23 20:37:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 658 states have (on average 1.3358662613981762) internal successors, (879), 684 states have internal predecessors, (879), 319 states have call successors, (319), 92 states have call predecessors, (319), 91 states have return successors, (313), 313 states have call predecessors, (313), 313 states have call successors, (313) [2023-11-23 20:37:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1511 transitions. [2023-11-23 20:37:24,965 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1511 transitions. Word has length 28 [2023-11-23 20:37:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:24,966 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1511 transitions. [2023-11-23 20:37:24,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1511 transitions. [2023-11-23 20:37:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:37:24,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:24,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:24,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:37:24,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:24,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash -287873134, now seen corresponding path program 1 times [2023-11-23 20:37:24,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:24,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628441141] [2023-11-23 20:37:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:25,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:25,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628441141] [2023-11-23 20:37:25,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628441141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:25,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642767500] [2023-11-23 20:37:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:25,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:25,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:25,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:37:25,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:25,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642767500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:25,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:37:25,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052367149] [2023-11-23 20:37:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:25,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:25,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:25,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:25,791 INFO L87 Difference]: Start difference. First operand 1069 states and 1511 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:37:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:27,706 INFO L93 Difference]: Finished difference Result 2174 states and 3084 transitions. [2023-11-23 20:37:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-11-23 20:37:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:27,717 INFO L225 Difference]: With dead ends: 2174 [2023-11-23 20:37:27,717 INFO L226 Difference]: Without dead ends: 1115 [2023-11-23 20:37:27,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:27,724 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 15 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:27,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1502 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 20:37:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2023-11-23 20:37:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1113. [2023-11-23 20:37:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 690 states have (on average 1.3434782608695652) internal successors, (927), 716 states have internal predecessors, (927), 331 states have call successors, (331), 92 states have call predecessors, (331), 91 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2023-11-23 20:37:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1583 transitions. [2023-11-23 20:37:27,844 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1583 transitions. Word has length 33 [2023-11-23 20:37:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:27,845 INFO L495 AbstractCegarLoop]: Abstraction has 1113 states and 1583 transitions. [2023-11-23 20:37:27,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:37:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1583 transitions. [2023-11-23 20:37:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 20:37:27,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:27,850 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:27,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:28,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:37:28,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:28,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:28,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1006881356, now seen corresponding path program 1 times [2023-11-23 20:37:28,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:28,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773963062] [2023-11-23 20:37:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:37:28,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773963062] [2023-11-23 20:37:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773963062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:28,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337410060] [2023-11-23 20:37:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:28,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:28,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:28,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:28,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:37:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:28,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:28,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:37:28,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:28,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337410060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:28,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:28,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:37:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505091565] [2023-11-23 20:37:28,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:28,937 INFO L87 Difference]: Start difference. First operand 1113 states and 1583 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:30,092 INFO L93 Difference]: Finished difference Result 1115 states and 1584 transitions. [2023-11-23 20:37:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2023-11-23 20:37:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:30,102 INFO L225 Difference]: With dead ends: 1115 [2023-11-23 20:37:30,102 INFO L226 Difference]: Without dead ends: 1112 [2023-11-23 20:37:30,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:30,106 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 828 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:30,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 751 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 20:37:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2023-11-23 20:37:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2023-11-23 20:37:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 690 states have (on average 1.3420289855072465) internal successors, (926), 715 states have internal predecessors, (926), 330 states have call successors, (330), 92 states have call predecessors, (330), 91 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2023-11-23 20:37:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1581 transitions. [2023-11-23 20:37:30,227 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1581 transitions. Word has length 37 [2023-11-23 20:37:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:30,227 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1581 transitions. [2023-11-23 20:37:30,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1581 transitions. [2023-11-23 20:37:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 20:37:30,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:30,229 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:30,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:30,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:37:30,457 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:30,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1148971351, now seen corresponding path program 1 times [2023-11-23 20:37:30,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:30,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982456499] [2023-11-23 20:37:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:30,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:37:30,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:30,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982456499] [2023-11-23 20:37:30,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982456499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:30,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001178468] [2023-11-23 20:37:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:30,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:30,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:30,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:30,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:37:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:31,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:31,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:37:31,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:31,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001178468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:31,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:31,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:37:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28051458] [2023-11-23 20:37:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:31,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:31,341 INFO L87 Difference]: Start difference. First operand 1112 states and 1581 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:32,343 INFO L93 Difference]: Finished difference Result 1114 states and 1582 transitions. [2023-11-23 20:37:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2023-11-23 20:37:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:32,355 INFO L225 Difference]: With dead ends: 1114 [2023-11-23 20:37:32,356 INFO L226 Difference]: Without dead ends: 1111 [2023-11-23 20:37:32,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:32,358 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 825 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:32,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 749 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:37:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2023-11-23 20:37:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1111. [2023-11-23 20:37:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 690 states have (on average 1.3405797101449275) internal successors, (925), 714 states have internal predecessors, (925), 329 states have call successors, (329), 92 states have call predecessors, (329), 91 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2023-11-23 20:37:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1579 transitions. [2023-11-23 20:37:32,464 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1579 transitions. Word has length 38 [2023-11-23 20:37:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:32,464 INFO L495 AbstractCegarLoop]: Abstraction has 1111 states and 1579 transitions. [2023-11-23 20:37:32,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1579 transitions. [2023-11-23 20:37:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 20:37:32,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:32,466 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:32,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:32,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 20:37:32,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:32,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1258789033, now seen corresponding path program 1 times [2023-11-23 20:37:32,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:32,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835776153] [2023-11-23 20:37:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:37:32,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835776153] [2023-11-23 20:37:32,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835776153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716875965] [2023-11-23 20:37:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:32,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:32,884 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:32,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:37:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:33,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:33,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:37:33,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:33,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716875965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:33,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:33,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:37:33,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380963011] [2023-11-23 20:37:33,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:33,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:33,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:33,487 INFO L87 Difference]: Start difference. First operand 1111 states and 1579 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:34,556 INFO L93 Difference]: Finished difference Result 1113 states and 1580 transitions. [2023-11-23 20:37:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:34,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-23 20:37:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:34,569 INFO L225 Difference]: With dead ends: 1113 [2023-11-23 20:37:34,569 INFO L226 Difference]: Without dead ends: 1110 [2023-11-23 20:37:34,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:34,573 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 822 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 747 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 20:37:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2023-11-23 20:37:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2023-11-23 20:37:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 690 states have (on average 1.3391304347826087) internal successors, (924), 713 states have internal predecessors, (924), 328 states have call successors, (328), 92 states have call predecessors, (328), 91 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2023-11-23 20:37:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1577 transitions. [2023-11-23 20:37:34,709 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1577 transitions. Word has length 39 [2023-11-23 20:37:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:34,709 INFO L495 AbstractCegarLoop]: Abstraction has 1110 states and 1577 transitions. [2023-11-23 20:37:34,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1577 transitions. [2023-11-23 20:37:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 20:37:34,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:34,711 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:34,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:34,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:34,934 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:34,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash -368165012, now seen corresponding path program 1 times [2023-11-23 20:37:34,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:34,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326348307] [2023-11-23 20:37:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:34,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:37:35,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326348307] [2023-11-23 20:37:35,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326348307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120235939] [2023-11-23 20:37:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:35,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:35,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:35,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:35,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:37:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:35,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:35,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:37:35,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120235939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:35,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:37:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597032947] [2023-11-23 20:37:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:35,752 INFO L87 Difference]: Start difference. First operand 1110 states and 1577 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:37,159 INFO L93 Difference]: Finished difference Result 1284 states and 1802 transitions. [2023-11-23 20:37:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:37,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-11-23 20:37:37,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:37,170 INFO L225 Difference]: With dead ends: 1284 [2023-11-23 20:37:37,170 INFO L226 Difference]: Without dead ends: 1255 [2023-11-23 20:37:37,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:37,172 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 761 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:37,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1159 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 20:37:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2023-11-23 20:37:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1255. [2023-11-23 20:37:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 766 states have (on average 1.3198433420365536) internal successors, (1011), 792 states have internal predecessors, (1011), 377 states have call successors, (377), 112 states have call predecessors, (377), 111 states have return successors, (376), 376 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-23 20:37:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1764 transitions. [2023-11-23 20:37:37,304 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1764 transitions. Word has length 40 [2023-11-23 20:37:37,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:37,305 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1764 transitions. [2023-11-23 20:37:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:37,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1764 transitions. [2023-11-23 20:37:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 20:37:37,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:37,308 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:37,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:37,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:37,525 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:37,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1920668929, now seen corresponding path program 1 times [2023-11-23 20:37:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:37,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903691004] [2023-11-23 20:37:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:37,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:37,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903691004] [2023-11-23 20:37:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903691004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:37,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90797961] [2023-11-23 20:37:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:37,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:37,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:37,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:37,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:37:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:38,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:37:38,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:37:38,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:38,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90797961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:38,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:38,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:37:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944963940] [2023-11-23 20:37:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:38,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:38,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:38,278 INFO L87 Difference]: Start difference. First operand 1255 states and 1764 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:37:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:40,077 INFO L93 Difference]: Finished difference Result 2512 states and 3533 transitions. [2023-11-23 20:37:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2023-11-23 20:37:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:40,095 INFO L225 Difference]: With dead ends: 2512 [2023-11-23 20:37:40,095 INFO L226 Difference]: Without dead ends: 1267 [2023-11-23 20:37:40,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:40,104 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 9 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:40,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1435 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 20:37:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2023-11-23 20:37:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1257. [2023-11-23 20:37:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 768 states have (on average 1.3190104166666667) internal successors, (1013), 794 states have internal predecessors, (1013), 377 states have call successors, (377), 112 states have call predecessors, (377), 111 states have return successors, (376), 376 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-23 20:37:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1766 transitions. [2023-11-23 20:37:40,224 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1766 transitions. Word has length 64 [2023-11-23 20:37:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:40,224 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1766 transitions. [2023-11-23 20:37:40,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:37:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1766 transitions. [2023-11-23 20:37:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 20:37:40,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:40,228 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:40,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:40,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:40,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:40,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash -927667091, now seen corresponding path program 1 times [2023-11-23 20:37:40,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:40,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119759800] [2023-11-23 20:37:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:37:40,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:40,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119759800] [2023-11-23 20:37:40,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119759800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:40,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543039869] [2023-11-23 20:37:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:40,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:40,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:40,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:40,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba099a21-2a6d-416f-918d-adf1a868eff7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:37:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:41,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:41,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:37:41,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:37:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543039869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287374122] [2023-11-23 20:37:41,434 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2023-11-23 20:37:41,434 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:41,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:41,443 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:41,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs