./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5 --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 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:46:07,068 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:46:07,134 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:46:07,139 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:46:07,140 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:46:07,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:46:07,181 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:46:07,182 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:46:07,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:46:07,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:46:07,189 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:46:07,191 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:46:07,191 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:46:07,193 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:46:07,193 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:46:07,194 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:46:07,194 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:46:07,195 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:46:07,196 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:46:07,196 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:46:07,197 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:46:07,197 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:46:07,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:46:07,199 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:46:07,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:46:07,200 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:46:07,200 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:46:07,201 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:46:07,201 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:46:07,202 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:46:07,203 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:46:07,204 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:46:07,204 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:46:07,204 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:46:07,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:46:07,205 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:46:07,205 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:46:07,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:46:07,206 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:46:07,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:46:07,206 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:46:07,207 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:46:07,207 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:46:07,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:46:07,208 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_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d [2023-11-21 19:46:07,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:46:07,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:46:07,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:46:07,559 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:46:07,559 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:46:07,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2023-11-21 19:46:10,663 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:46:11,329 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:46:11,330 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2023-11-21 19:46:11,387 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/data/84c1e7fe9/8607343c3c4946ed8c5d301b8a991533/FLAG7b3c9fc1d [2023-11-21 19:46:11,409 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/data/84c1e7fe9/8607343c3c4946ed8c5d301b8a991533 [2023-11-21 19:46:11,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:46:11,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:46:11,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:46:11,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:46:11,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:46:11,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:46:11" (1/1) ... [2023-11-21 19:46:11,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a63989c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:11, skipping insertion in model container [2023-11-21 19:46:11,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:46:11" (1/1) ... [2023-11-21 19:46:11,581 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:46:12,660 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_06cd7ae2-9816-49d3-aca8-df0e4aa63353/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2023-11-21 19:46:13,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:46:13,302 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:46:13,566 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "m" (__preempt_count)); [6185] [2023-11-21 19:46:13,568 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [6188] [2023-11-21 19:46:13,568 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [6191] [2023-11-21 19:46:13,569 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [6194] [2023-11-21 19:46:13,583 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_06cd7ae2-9816-49d3-aca8-df0e4aa63353/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2023-11-21 19:46:13,788 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers/net/--X--defaultlinux-3.16-rc1.tar.xz--X--205_9a--X--cpachecker/linux-3.16-rc1.tar.xz/csd_deg_dscv/312/dscv_tempdir/dscv/ri/205_9a/drivers/net/wireless/libertas/if_usb.o.c.prepared"), "i" (684), "i" (12UL)); [7310-7311] [2023-11-21 19:46:13,794 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers/net/--X--defaultlinux-3.16-rc1.tar.xz--X--205_9a--X--cpachecker/linux-3.16-rc1.tar.xz/csd_deg_dscv/312/dscv_tempdir/dscv/ri/205_9a/drivers/net/wireless/libertas/if_usb.o.c.prepared"), "i" (689), "i" (12UL)); [7320-7321] [2023-11-21 19:46:13,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:46:13,937 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:13,945 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:46:13,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13 WrapperNode [2023-11-21 19:46:13,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:46:13,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:46:13,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:46:13,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:46:13,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,222 INFO L138 Inliner]: procedures = 180, calls = 1361, calls flagged for inlining = 87, calls inlined = 41, statements flattened = 2048 [2023-11-21 19:46:14,223 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:46:14,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:46:14,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:46:14,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:46:14,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:46:14,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:46:14,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:46:14,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:46:14,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (1/1) ... [2023-11-21 19:46:14,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:46:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:14,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:46:14,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:46:14,494 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_reset_device [2023-11-21 19:46:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_reset_device [2023-11-21 19:46:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_resume [2023-11-21 19:46:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_resume [2023-11-21 19:46:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-21 19:46:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-21 19:46:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-21 19:46:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-21 19:46:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-21 19:46:14,496 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-21 19:46:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 19:46:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 19:46:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:46:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-11-21 19:46:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-11-21 19:46:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2023-11-21 19:46:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2023-11-21 19:46:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-21 19:46:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-21 19:46:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 19:46:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 19:46:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-21 19:46:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-21 19:46:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2023-11-21 19:46:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2023-11-21 19:46:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb [2023-11-21 19:46:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb [2023-11-21 19:46:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2023-11-21 19:46:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2023-11-21 19:46:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-21 19:46:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-21 19:46:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure __if_usb_submit_rx_urb [2023-11-21 19:46:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __if_usb_submit_rx_urb [2023-11-21 19:46:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:46:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-21 19:46:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-21 19:46:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 19:46:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 19:46:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_free [2023-11-21 19:46:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_free [2023-11-21 19:46:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 19:46:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 19:46:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:46:14,507 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:46:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:46:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_disconnect [2023-11-21 19:46:14,507 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_disconnect [2023-11-21 19:46:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure usb_tx_block [2023-11-21 19:46:14,508 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_tx_block [2023-11-21 19:46:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:46:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2023-11-21 19:46:14,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2023-11-21 19:46:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:46:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:46:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-21 19:46:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:46:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2023-11-21 19:46:14,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2023-11-21 19:46:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-21 19:46:14,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-21 19:46:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2023-11-21 19:46:14,512 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2023-11-21 19:46:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-21 19:46:14,512 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-21 19:46:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:46:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:46:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 19:46:14,513 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 19:46:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure lbs_remove_card [2023-11-21 19:46:14,513 INFO L138 BoogieDeclarations]: Found implementation of procedure lbs_remove_card [2023-11-21 19:46:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-21 19:46:14,514 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-21 19:46:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2023-11-21 19:46:14,514 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2023-11-21 19:46:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-21 19:46:14,514 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-21 19:46:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:46:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-21 19:46:14,515 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-21 19:46:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-21 19:46:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-21 19:46:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 19:46:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 19:46:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:46:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:46:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2023-11-21 19:46:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2023-11-21 19:46:14,986 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:46:14,991 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:46:15,298 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 19:46:17,492 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:46:18,408 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:46:18,408 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 19:46:18,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:46:18 BoogieIcfgContainer [2023-11-21 19:46:18,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:46:18,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:46:18,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:46:18,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:46:18,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:46:11" (1/3) ... [2023-11-21 19:46:18,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e2b2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:46:18, skipping insertion in model container [2023-11-21 19:46:18,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:13" (2/3) ... [2023-11-21 19:46:18,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e2b2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:46:18, skipping insertion in model container [2023-11-21 19:46:18,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:46:18" (3/3) ... [2023-11-21 19:46:18,424 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2023-11-21 19:46:18,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:46:18,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:46:18,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:46:18,544 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;@16f1437b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:46:18,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:46:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 440 states, 276 states have (on average 1.3297101449275361) internal successors, (367), 290 states have internal predecessors, (367), 126 states have call successors, (126), 37 states have call predecessors, (126), 36 states have return successors, (122), 119 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-21 19:46:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 19:46:18,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:18,568 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] [2023-11-21 19:46:18,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:18,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash 924912675, now seen corresponding path program 1 times [2023-11-21 19:46:18,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:18,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186269578] [2023-11-21 19:46:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:18,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:46:19,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186269578] [2023-11-21 19:46:19,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186269578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:19,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:19,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117307359] [2023-11-21 19:46:19,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:19,440 INFO L87 Difference]: Start difference. First operand has 440 states, 276 states have (on average 1.3297101449275361) internal successors, (367), 290 states have internal predecessors, (367), 126 states have call successors, (126), 37 states have call predecessors, (126), 36 states have return successors, (122), 119 states have call predecessors, (122), 122 states have call successors, (122) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-21 19:46:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:20,677 INFO L93 Difference]: Finished difference Result 1292 states and 1826 transitions. [2023-11-21 19:46:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 22 [2023-11-21 19:46:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:20,710 INFO L225 Difference]: With dead ends: 1292 [2023-11-21 19:46:20,710 INFO L226 Difference]: Without dead ends: 848 [2023-11-21 19:46:20,724 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 [2023-11-21 19:46:20,729 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 583 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:20,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 1003 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 19:46:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2023-11-21 19:46:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2023-11-21 19:46:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 538 states have (on average 1.295539033457249) internal successors, (697), 554 states have internal predecessors, (697), 240 states have call successors, (240), 70 states have call predecessors, (240), 69 states have return successors, (239), 233 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-21 19:46:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1176 transitions. [2023-11-21 19:46:20,915 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1176 transitions. Word has length 22 [2023-11-21 19:46:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:20,922 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1176 transitions. [2023-11-21 19:46:20,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-21 19:46:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1176 transitions. [2023-11-21 19:46:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 19:46:20,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:20,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:20,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:46:20,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:20,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1254294888, now seen corresponding path program 1 times [2023-11-21 19:46:20,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187374822] [2023-11-21 19:46:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:46:21,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:21,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187374822] [2023-11-21 19:46:21,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187374822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:21,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:21,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:46:21,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29427206] [2023-11-21 19:46:21,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:21,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:46:21,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:21,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:46:21,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:46:21,607 INFO L87 Difference]: Start difference. First operand 848 states and 1176 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 19:46:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:22,995 INFO L93 Difference]: Finished difference Result 1688 states and 2356 transitions. [2023-11-21 19:46:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:46:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-21 19:46:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:23,010 INFO L225 Difference]: With dead ends: 1688 [2023-11-21 19:46:23,010 INFO L226 Difference]: Without dead ends: 1683 [2023-11-21 19:46:23,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:46:23,013 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 580 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:23,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1502 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-21 19:46:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2023-11-21 19:46:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1675. [2023-11-21 19:46:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1060 states have (on average 1.2952830188679245) internal successors, (1373), 1092 states have internal predecessors, (1373), 477 states have call successors, (477), 138 states have call predecessors, (477), 137 states have return successors, (490), 464 states have call predecessors, (490), 476 states have call successors, (490) [2023-11-21 19:46:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2340 transitions. [2023-11-21 19:46:23,132 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2340 transitions. Word has length 30 [2023-11-21 19:46:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:23,133 INFO L495 AbstractCegarLoop]: Abstraction has 1675 states and 2340 transitions. [2023-11-21 19:46:23,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 19:46:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2340 transitions. [2023-11-21 19:46:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-21 19:46:23,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:23,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:23,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:46:23,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:23,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:23,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1032901341, now seen corresponding path program 1 times [2023-11-21 19:46:23,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:23,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915038855] [2023-11-21 19:46:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:23,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:46:23,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:23,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915038855] [2023-11-21 19:46:23,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915038855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:23,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:23,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:23,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167059552] [2023-11-21 19:46:23,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:23,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:23,501 INFO L87 Difference]: Start difference. First operand 1675 states and 2340 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 19:46:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:24,212 INFO L93 Difference]: Finished difference Result 2687 states and 3754 transitions. [2023-11-21 19:46:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:24,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 82 [2023-11-21 19:46:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:24,220 INFO L225 Difference]: With dead ends: 2687 [2023-11-21 19:46:24,220 INFO L226 Difference]: Without dead ends: 1020 [2023-11-21 19:46:24,228 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 [2023-11-21 19:46:24,232 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 85 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:24,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 965 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 19:46:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2023-11-21 19:46:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1015. [2023-11-21 19:46:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 659 states have (on average 1.3277693474962065) internal successors, (875), 687 states have internal predecessors, (875), 268 states have call successors, (268), 88 states have call predecessors, (268), 87 states have return successors, (274), 252 states have call predecessors, (274), 267 states have call successors, (274) [2023-11-21 19:46:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1417 transitions. [2023-11-21 19:46:24,310 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1417 transitions. Word has length 82 [2023-11-21 19:46:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:24,311 INFO L495 AbstractCegarLoop]: Abstraction has 1015 states and 1417 transitions. [2023-11-21 19:46:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 19:46:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1417 transitions. [2023-11-21 19:46:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-21 19:46:24,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:24,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:24,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:46:24,317 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:24,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2024616454, now seen corresponding path program 1 times [2023-11-21 19:46:24,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:24,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232509364] [2023-11-21 19:46:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:24,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:46:24,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:24,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232509364] [2023-11-21 19:46:24,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232509364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:24,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:24,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:46:24,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315030191] [2023-11-21 19:46:24,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:46:24,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:46:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:46:24,747 INFO L87 Difference]: Start difference. First operand 1015 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-21 19:46:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:25,540 INFO L93 Difference]: Finished difference Result 2185 states and 3033 transitions. [2023-11-21 19:46:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:46:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 85 [2023-11-21 19:46:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:25,553 INFO L225 Difference]: With dead ends: 2185 [2023-11-21 19:46:25,553 INFO L226 Difference]: Without dead ends: 1234 [2023-11-21 19:46:25,560 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 [2023-11-21 19:46:25,564 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 396 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:25,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 815 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 19:46:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2023-11-21 19:46:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1229. [2023-11-21 19:46:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 807 states have (on average 1.3308550185873607) internal successors, (1074), 843 states have internal predecessors, (1074), 302 states have call successors, (302), 120 states have call predecessors, (302), 119 states have return successors, (308), 280 states have call predecessors, (308), 301 states have call successors, (308) [2023-11-21 19:46:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1684 transitions. [2023-11-21 19:46:25,654 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1684 transitions. Word has length 85 [2023-11-21 19:46:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:25,657 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1684 transitions. [2023-11-21 19:46:25,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-21 19:46:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1684 transitions. [2023-11-21 19:46:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-21 19:46:25,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:25,663 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:25,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:46:25,663 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:25,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash 928275124, now seen corresponding path program 1 times [2023-11-21 19:46:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:25,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199281261] [2023-11-21 19:46:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:25,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-21 19:46:26,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199281261] [2023-11-21 19:46:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199281261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:26,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:26,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:46:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032679404] [2023-11-21 19:46:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:46:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:46:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:46:26,383 INFO L87 Difference]: Start difference. First operand 1229 states and 1684 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-21 19:46:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:28,060 INFO L93 Difference]: Finished difference Result 2412 states and 3317 transitions. [2023-11-21 19:46:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:46:28,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 112 [2023-11-21 19:46:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:28,070 INFO L225 Difference]: With dead ends: 2412 [2023-11-21 19:46:28,070 INFO L226 Difference]: Without dead ends: 1247 [2023-11-21 19:46:28,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:46:28,075 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 2 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:28,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1959 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 19:46:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2023-11-21 19:46:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1239. [2023-11-21 19:46:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 814 states have (on average 1.328009828009828) internal successors, (1081), 851 states have internal predecessors, (1081), 302 states have call successors, (302), 120 states have call predecessors, (302), 122 states have return successors, (311), 282 states have call predecessors, (311), 301 states have call successors, (311) [2023-11-21 19:46:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1694 transitions. [2023-11-21 19:46:28,150 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1694 transitions. Word has length 112 [2023-11-21 19:46:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:28,152 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1694 transitions. [2023-11-21 19:46:28,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-21 19:46:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1694 transitions. [2023-11-21 19:46:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-21 19:46:28,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:28,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:28,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:46:28,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:28,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash 61006934, now seen corresponding path program 1 times [2023-11-21 19:46:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569788790] [2023-11-21 19:46:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:28,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 19:46:28,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:28,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569788790] [2023-11-21 19:46:28,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569788790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:28,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:28,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:46:28,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947675928] [2023-11-21 19:46:28,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:28,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:46:28,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:46:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:46:28,861 INFO L87 Difference]: Start difference. First operand 1239 states and 1694 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-21 19:46:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:30,850 INFO L93 Difference]: Finished difference Result 2646 states and 3660 transitions. [2023-11-21 19:46:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:46:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 113 [2023-11-21 19:46:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:30,865 INFO L225 Difference]: With dead ends: 2646 [2023-11-21 19:46:30,865 INFO L226 Difference]: Without dead ends: 1471 [2023-11-21 19:46:30,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:46:30,872 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 376 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:30,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1593 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-21 19:46:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2023-11-21 19:46:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1369. [2023-11-21 19:46:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 916 states have (on average 1.3427947598253276) internal successors, (1230), 959 states have internal predecessors, (1230), 322 states have call successors, (322), 128 states have call predecessors, (322), 130 states have return successors, (331), 296 states have call predecessors, (331), 321 states have call successors, (331) [2023-11-21 19:46:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1883 transitions. [2023-11-21 19:46:30,977 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1883 transitions. Word has length 113 [2023-11-21 19:46:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:30,978 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 1883 transitions. [2023-11-21 19:46:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-21 19:46:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1883 transitions. [2023-11-21 19:46:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-21 19:46:30,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:30,984 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:30,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:46:30,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1896427487, now seen corresponding path program 1 times [2023-11-21 19:46:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080058688] [2023-11-21 19:46:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-21 19:46:31,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080058688] [2023-11-21 19:46:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080058688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:46:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044526672] [2023-11-21 19:46:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:31,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:31,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:31,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:46:32,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:46:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:32,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 2998 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:46:32,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:46:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-21 19:46:33,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:46:33,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044526672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:33,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:46:33,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-21 19:46:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126385067] [2023-11-21 19:46:33,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:33,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:46:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:46:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:46:33,137 INFO L87 Difference]: Start difference. First operand 1369 states and 1883 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-21 19:46:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:36,455 INFO L93 Difference]: Finished difference Result 4382 states and 6125 transitions. [2023-11-21 19:46:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:46:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 173 [2023-11-21 19:46:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:36,488 INFO L225 Difference]: With dead ends: 4382 [2023-11-21 19:46:36,488 INFO L226 Difference]: Without dead ends: 4377 [2023-11-21 19:46:36,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:46:36,492 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1387 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:36,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1392 Valid, 2027 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-21 19:46:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2023-11-21 19:46:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3965. [2023-11-21 19:46:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3965 states, 2646 states have (on average 1.3408919123204837) internal successors, (3548), 2771 states have internal predecessors, (3548), 942 states have call successors, (942), 368 states have call predecessors, (942), 376 states have return successors, (971), 868 states have call predecessors, (971), 941 states have call successors, (971) [2023-11-21 19:46:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3965 states to 3965 states and 5461 transitions. [2023-11-21 19:46:36,788 INFO L78 Accepts]: Start accepts. Automaton has 3965 states and 5461 transitions. Word has length 173 [2023-11-21 19:46:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:36,789 INFO L495 AbstractCegarLoop]: Abstraction has 3965 states and 5461 transitions. [2023-11-21 19:46:36,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-21 19:46:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3965 states and 5461 transitions. [2023-11-21 19:46:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-21 19:46:36,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:36,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:36,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:46:37,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:37,023 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:37,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash 346834761, now seen corresponding path program 1 times [2023-11-21 19:46:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:37,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948174906] [2023-11-21 19:46:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-21 19:46:37,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:37,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948174906] [2023-11-21 19:46:37,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948174906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:37,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:37,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:46:37,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994902970] [2023-11-21 19:46:37,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:37,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:46:37,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:46:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:46:37,750 INFO L87 Difference]: Start difference. First operand 3965 states and 5461 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-21 19:46:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:38,944 INFO L93 Difference]: Finished difference Result 7699 states and 10603 transitions. [2023-11-21 19:46:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:46:38,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 178 [2023-11-21 19:46:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:38,976 INFO L225 Difference]: With dead ends: 7699 [2023-11-21 19:46:38,976 INFO L226 Difference]: Without dead ends: 3606 [2023-11-21 19:46:38,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:46:38,992 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 835 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:38,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 630 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 19:46:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2023-11-21 19:46:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3558. [2023-11-21 19:46:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 2339 states have (on average 1.3073963232150492) internal successors, (3058), 2436 states have internal predecessors, (3058), 876 states have call successors, (876), 334 states have call predecessors, (876), 342 states have return successors, (905), 823 states have call predecessors, (905), 875 states have call successors, (905) [2023-11-21 19:46:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 4839 transitions. [2023-11-21 19:46:39,337 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 4839 transitions. Word has length 178 [2023-11-21 19:46:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:39,337 INFO L495 AbstractCegarLoop]: Abstraction has 3558 states and 4839 transitions. [2023-11-21 19:46:39,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-21 19:46:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 4839 transitions. [2023-11-21 19:46:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-21 19:46:39,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:39,349 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:39,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 19:46:39,350 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:39,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:39,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1729038945, now seen corresponding path program 1 times [2023-11-21 19:46:39,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:39,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013618009] [2023-11-21 19:46:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:39,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-21 19:46:41,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:41,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013618009] [2023-11-21 19:46:41,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013618009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:46:41,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833179083] [2023-11-21 19:46:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:41,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:41,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:46:41,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:46:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:42,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:46:42,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:46:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-21 19:46:42,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:46:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-21 19:46:43,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833179083] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 19:46:43,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:46:43,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2023-11-21 19:46:43,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930798189] [2023-11-21 19:46:43,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:43,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:46:43,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:46:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:46:43,329 INFO L87 Difference]: Start difference. First operand 3558 states and 4839 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 4 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2023-11-21 19:46:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:45,362 INFO L93 Difference]: Finished difference Result 7543 states and 10246 transitions. [2023-11-21 19:46:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:46:45,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 4 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 225 [2023-11-21 19:46:45,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:45,419 INFO L225 Difference]: With dead ends: 7543 [2023-11-21 19:46:45,419 INFO L226 Difference]: Without dead ends: 7490 [2023-11-21 19:46:45,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:46:45,427 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 1001 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:45,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1365 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 19:46:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7490 states. [2023-11-21 19:46:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7490 to 7482. [2023-11-21 19:46:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 4886 states have (on average 1.3082275890298813) internal successors, (6392), 5094 states have internal predecessors, (6392), 1854 states have call successors, (1854), 724 states have call predecessors, (1854), 741 states have return successors, (1913), 1741 states have call predecessors, (1913), 1853 states have call successors, (1913) [2023-11-21 19:46:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 10159 transitions. [2023-11-21 19:46:46,228 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 10159 transitions. Word has length 225 [2023-11-21 19:46:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:46,229 INFO L495 AbstractCegarLoop]: Abstraction has 7482 states and 10159 transitions. [2023-11-21 19:46:46,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 4 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2023-11-21 19:46:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 10159 transitions. [2023-11-21 19:46:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-11-21 19:46:46,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:46,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:46,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:46:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06cd7ae2-9816-49d3-aca8-df0e4aa63353/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:46,476 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1668630907, now seen corresponding path program 1 times [2023-11-21 19:46:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:46,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862100711] [2023-11-21 19:46:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-21 19:46:47,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:47,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862100711] [2023-11-21 19:46:47,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862100711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:47,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:47,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:46:47,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116473778] [2023-11-21 19:46:47,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:47,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:46:47,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:46:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:46:47,494 INFO L87 Difference]: Start difference. First operand 7482 states and 10159 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-11-21 19:46:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:50,445 INFO L93 Difference]: Finished difference Result 19052 states and 26522 transitions. [2023-11-21 19:46:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:46:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 230 [2023-11-21 19:46:50,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:50,535 INFO L225 Difference]: With dead ends: 19052 [2023-11-21 19:46:50,536 INFO L226 Difference]: Without dead ends: 11645 [2023-11-21 19:46:50,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:46:50,562 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 1061 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:50,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1403 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-21 19:46:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2023-11-21 19:46:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 9452. [2023-11-21 19:46:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9452 states, 6374 states have (on average 1.3393473486037026) internal successors, (8537), 6692 states have internal predecessors, (8537), 2170 states have call successors, (2170), 890 states have call predecessors, (2170), 907 states have return successors, (2229), 1979 states have call predecessors, (2229), 2169 states have call successors, (2229) [2023-11-21 19:46:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9452 states to 9452 states and 12936 transitions. [2023-11-21 19:46:51,469 INFO L78 Accepts]: Start accepts. Automaton has 9452 states and 12936 transitions. Word has length 230 [2023-11-21 19:46:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:51,470 INFO L495 AbstractCegarLoop]: Abstraction has 9452 states and 12936 transitions. [2023-11-21 19:46:51,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2023-11-21 19:46:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 9452 states and 12936 transitions. [2023-11-21 19:46:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-21 19:46:51,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:51,496 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:51,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 19:46:51,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:51,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 395928523, now seen corresponding path program 1 times [2023-11-21 19:46:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:51,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414178096] [2023-11-21 19:46:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat