./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.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_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/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_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/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_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/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 be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:01:44,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:01:44,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:01:44,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:01:44,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:01:45,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:01:45,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:01:45,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:01:45,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:01:45,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:01:45,021 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:01:45,021 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:01:45,022 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:01:45,023 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:01:45,024 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:01:45,024 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:01:45,025 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:01:45,025 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:01:45,026 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:01:45,026 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:01:45,026 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:01:45,027 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:01:45,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:01:45,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:01:45,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:01:45,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:01:45,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:01:45,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:01:45,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:01:45,031 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:01:45,033 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:01:45,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:01:45,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:01:45,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:01:45,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:01:45,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:01:45,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:01:45,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:01:45,035 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:01:45,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:01:45,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:01:45,036 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:01:45,036 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:01:45,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:01:45,037 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_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2023-11-21 19:01:45,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:01:45,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:01:45,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:01:45,447 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:01:45,449 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:01:45,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-21 19:01:48,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:01:49,370 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:01:49,371 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-21 19:01:49,419 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/data/7dc7d4906/664fceb55f5e4a3e860cdbbe51a821f2/FLAG73b1c5b5b [2023-11-21 19:01:49,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/data/7dc7d4906/664fceb55f5e4a3e860cdbbe51a821f2 [2023-11-21 19:01:49,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:01:49,448 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:01:49,449 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:01:49,449 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:01:49,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:01:49,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:01:49" (1/1) ... [2023-11-21 19:01:49,463 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ea6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:49, skipping insertion in model container [2023-11-21 19:01:49,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:01:49" (1/1) ... [2023-11-21 19:01:49,617 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:01:50,726 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_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2023-11-21 19:01:51,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:01:51,358 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:01:51,524 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5441] [2023-11-21 19:01:51,526 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5448] [2023-11-21 19:01:51,530 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5456-5457] [2023-11-21 19:01:51,535 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [5485] [2023-11-21 19:01:51,536 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0": "+m" (v->counter)); [5492] [2023-11-21 19:01:51,558 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_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2023-11-21 19:01:51,685 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--X--defaultlinux-3.12-rc1.tar.xz--X--144_2a--X--cpachecker/linux-3.12-rc1.tar.xz/csd_deg_dscv/6225/dscv_tempdir/dscv/ri/144_2a/drivers/net/can/usb/ems_usb.o.c.prepared"), "i" (546), "i" (12UL)); [6159-6160] [2023-11-21 19:01:51,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:01:51,935 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:01:51,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51 WrapperNode [2023-11-21 19:01:51,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:01:51,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:01:51,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:01:51,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:01:51,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,218 INFO L138 Inliner]: procedures = 169, calls = 760, calls flagged for inlining = 78, calls inlined = 78, statements flattened = 2216 [2023-11-21 19:01:52,219 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:01:52,219 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:01:52,220 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:01:52,220 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:01:52,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,283 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:01:52,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:01:52,483 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:01:52,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:01:52,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (1/1) ... [2023-11-21 19:01:52,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:01:52,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:01:52,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:01:52,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b573eef-d628-4cd7-b081-2a0f5c84d5d6/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:01:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-21 19:01:52,565 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-21 19:01:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 19:01:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_18 [2023-11-21 19:01:52,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_18 [2023-11-21 19:01:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2023-11-21 19:01:52,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2023-11-21 19:01:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2023-11-21 19:01:52,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2023-11-21 19:01:52,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2023-11-21 19:01:52,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2023-11-21 19:01:52,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 19:01:52,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 19:01:52,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 19:01:52,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 19:01:52,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:01:52,567 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2023-11-21 19:01:52,567 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2023-11-21 19:01:52,568 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2023-11-21 19:01:52,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2023-11-21 19:01:52,569 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2023-11-21 19:01:52,569 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2023-11-21 19:01:52,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-21 19:01:52,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-21 19:01:52,570 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2023-11-21 19:01:52,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2023-11-21 19:01:52,570 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-11-21 19:01:52,570 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-11-21 19:01:52,571 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-21 19:01:52,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-21 19:01:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 19:01:52,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 19:01:52,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-21 19:01:52,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-21 19:01:52,573 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-21 19:01:52,573 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-21 19:01:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-21 19:01:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-21 19:01:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-21 19:01:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-21 19:01:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-21 19:01:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-21 19:01:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:01:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 19:01:52,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 19:01:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 19:01:52,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 19:01:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:01:52,575 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:01:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-21 19:01:52,575 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-21 19:01:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2023-11-21 19:01:52,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2023-11-21 19:01:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:01:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2023-11-21 19:01:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2023-11-21 19:01:52,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-21 19:01:52,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-21 19:01:52,579 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2023-11-21 19:01:52,579 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2023-11-21 19:01:52,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:01:52,579 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-11-21 19:01:52,579 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-11-21 19:01:52,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-21 19:01:52,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-21 19:01:52,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:01:52,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:01:52,580 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2023-11-21 19:01:52,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2023-11-21 19:01:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 19:01:52,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 19:01:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-21 19:01:52,581 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-21 19:01:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-21 19:01:52,581 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-21 19:01:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:01:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_disconnect [2023-11-21 19:01:52,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_disconnect [2023-11-21 19:01:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2023-11-21 19:01:52,582 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2023-11-21 19:01:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2023-11-21 19:01:52,583 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2023-11-21 19:01:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2023-11-21 19:01:52,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2023-11-21 19:01:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-21 19:01:52,583 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-21 19:01:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:01:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2023-11-21 19:01:52,584 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2023-11-21 19:01:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:01:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_rx_err [2023-11-21 19:01:52,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_rx_err [2023-11-21 19:01:52,585 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-21 19:01:52,585 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-21 19:01:52,585 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-11-21 19:01:52,585 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-11-21 19:01:52,585 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-21 19:01:52,585 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-21 19:01:52,585 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2023-11-21 19:01:52,586 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2023-11-21 19:01:52,586 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-21 19:01:52,586 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-21 19:01:52,586 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-21 19:01:52,587 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-21 19:01:52,587 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-21 19:01:52,587 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-21 19:01:52,587 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-11-21 19:01:52,587 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-11-21 19:01:52,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-21 19:01:52,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-21 19:01:52,588 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2023-11-21 19:01:52,588 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2023-11-21 19:01:52,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:01:52,589 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2023-11-21 19:01:52,589 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2023-11-21 19:01:52,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 19:01:52,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 19:01:52,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 19:01:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:01:52,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:01:53,186 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:01:53,190 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:01:53,473 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 19:01:54,556 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-21 19:01:56,655 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:01:57,772 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:01:57,772 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:01:57,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:01:57 BoogieIcfgContainer [2023-11-21 19:01:57,775 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:01:57,777 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:01:57,778 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:01:57,781 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:01:57,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:01:49" (1/3) ... [2023-11-21 19:01:57,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23075656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:01:57, skipping insertion in model container [2023-11-21 19:01:57,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:01:51" (2/3) ... [2023-11-21 19:01:57,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23075656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:01:57, skipping insertion in model container [2023-11-21 19:01:57,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:01:57" (3/3) ... [2023-11-21 19:01:57,785 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-21 19:01:57,808 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:01:57,809 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:01:57,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:01:57,917 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;@3f5b1ac2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:01:57,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:01:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 542 states, 333 states have (on average 1.3543543543543544) internal successors, (451), 357 states have internal predecessors, (451), 157 states have call successors, (157), 52 states have call predecessors, (157), 50 states have return successors, (151), 146 states have call predecessors, (151), 151 states have call successors, (151) [2023-11-21 19:01:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 19:01:57,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:01:57,942 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] [2023-11-21 19:01:57,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:01:57,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:01:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash 104424872, now seen corresponding path program 1 times [2023-11-21 19:01:57,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:01:57,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472847342] [2023-11-21 19:01:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:01:57,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:01:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:01:58,896 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 19:01:58,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:01:58,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472847342] [2023-11-21 19:01:58,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472847342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:01:58,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:01:58,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:01:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278720812] [2023-11-21 19:01:58,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:01:58,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:01:58,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:01:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:01:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:01:58,949 INFO L87 Difference]: Start difference. First operand has 542 states, 333 states have (on average 1.3543543543543544) internal successors, (451), 357 states have internal predecessors, (451), 157 states have call successors, (157), 52 states have call predecessors, (157), 50 states have return successors, (151), 146 states have call predecessors, (151), 151 states have call successors, (151) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 19:02:01,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:04,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:06,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:02:08,667 INFO L93 Difference]: Finished difference Result 1594 states and 2231 transitions. [2023-11-21 19:02:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:02:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 23 [2023-11-21 19:02:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:02:08,718 INFO L225 Difference]: With dead ends: 1594 [2023-11-21 19:02:08,719 INFO L226 Difference]: Without dead ends: 1037 [2023-11-21 19:02:08,732 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 19:02:08,739 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 715 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:02:08,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 1287 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 3 Unknown, 0 Unchecked, 9.5s Time] [2023-11-21 19:02:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-11-21 19:02:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2023-11-21 19:02:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 645 states have (on average 1.3255813953488371) internal successors, (855), 673 states have internal predecessors, (855), 293 states have call successors, (293), 99 states have call predecessors, (293), 98 states have return successors, (288), 278 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-21 19:02:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1436 transitions. [2023-11-21 19:02:08,978 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1436 transitions. Word has length 23 [2023-11-21 19:02:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:02:08,979 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1436 transitions. [2023-11-21 19:02:08,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 19:02:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1436 transitions. [2023-11-21 19:02:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 19:02:08,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:02:08,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 19:02:08,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:02:08,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:02:08,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:02:08,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1210125165, now seen corresponding path program 1 times [2023-11-21 19:02:08,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:02:08,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858559372] [2023-11-21 19:02:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:02:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:02:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:02:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:02:09,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:02:09,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858559372] [2023-11-21 19:02:09,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858559372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:02:09,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:02:09,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:02:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994377033] [2023-11-21 19:02:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:02:09,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:02:09,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:02:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:02:09,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:02:09,743 INFO L87 Difference]: Start difference. First operand 1037 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:12,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:15,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:02:17,517 INFO L93 Difference]: Finished difference Result 1823 states and 2504 transitions. [2023-11-21 19:02:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:02:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-21 19:02:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:02:17,538 INFO L225 Difference]: With dead ends: 1823 [2023-11-21 19:02:17,538 INFO L226 Difference]: Without dead ends: 1820 [2023-11-21 19:02:17,540 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 19:02:17,542 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 530 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:02:17,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1242 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2023-11-21 19:02:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2023-11-21 19:02:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1808. [2023-11-21 19:02:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1134 states have (on average 1.3350970017636685) internal successors, (1514), 1188 states have internal predecessors, (1514), 489 states have call successors, (489), 187 states have call predecessors, (489), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-21 19:02:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2487 transitions. [2023-11-21 19:02:17,702 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2487 transitions. Word has length 32 [2023-11-21 19:02:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:02:17,702 INFO L495 AbstractCegarLoop]: Abstraction has 1808 states and 2487 transitions. [2023-11-21 19:02:17,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2487 transitions. [2023-11-21 19:02:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-21 19:02:17,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:02:17,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 19:02:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:02:17,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:02:17,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:02:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1141175100, now seen corresponding path program 1 times [2023-11-21 19:02:17,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:02:17,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33022663] [2023-11-21 19:02:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:02:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:02:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:02:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:02:18,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:02:18,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33022663] [2023-11-21 19:02:18,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33022663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:02:18,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:02:18,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:02:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020890191] [2023-11-21 19:02:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:02:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:02:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:02:18,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:02:18,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:02:18,279 INFO L87 Difference]: Start difference. First operand 1808 states and 2487 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:20,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:21,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:24,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:02:24,032 INFO L93 Difference]: Finished difference Result 1810 states and 2488 transitions. [2023-11-21 19:02:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:02:24,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-21 19:02:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:02:24,049 INFO L225 Difference]: With dead ends: 1810 [2023-11-21 19:02:24,049 INFO L226 Difference]: Without dead ends: 1807 [2023-11-21 19:02:24,051 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 19:02:24,052 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 715 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:02:24,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 626 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-11-21 19:02:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-11-21 19:02:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2023-11-21 19:02:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1134 states have (on average 1.3342151675485008) internal successors, (1513), 1187 states have internal predecessors, (1513), 488 states have call successors, (488), 187 states have call predecessors, (488), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-21 19:02:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2485 transitions. [2023-11-21 19:02:24,241 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2485 transitions. Word has length 33 [2023-11-21 19:02:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:02:24,242 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2485 transitions. [2023-11-21 19:02:24,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2485 transitions. [2023-11-21 19:02:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 19:02:24,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:02:24,246 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 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 19:02:24,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:02:24,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:02:24,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:02:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1017034416, now seen corresponding path program 1 times [2023-11-21 19:02:24,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:02:24,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040823328] [2023-11-21 19:02:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:02:24,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:02:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:02:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:02:24,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:02:24,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040823328] [2023-11-21 19:02:24,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040823328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:02:24,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:02:24,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:02:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911957970] [2023-11-21 19:02:24,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:02:24,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:02:24,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:02:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:02:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:02:24,546 INFO L87 Difference]: Start difference. First operand 1807 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:27,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:02:28,676 INFO L93 Difference]: Finished difference Result 1809 states and 2486 transitions. [2023-11-21 19:02:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:02:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-21 19:02:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:02:28,691 INFO L225 Difference]: With dead ends: 1809 [2023-11-21 19:02:28,691 INFO L226 Difference]: Without dead ends: 1806 [2023-11-21 19:02:28,693 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 19:02:28,694 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 712 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:02:28,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 624 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-11-21 19:02:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-11-21 19:02:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1806. [2023-11-21 19:02:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1134 states have (on average 1.3333333333333333) internal successors, (1512), 1186 states have internal predecessors, (1512), 487 states have call successors, (487), 187 states have call predecessors, (487), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-21 19:02:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2483 transitions. [2023-11-21 19:02:28,846 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2483 transitions. Word has length 34 [2023-11-21 19:02:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:02:28,847 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2483 transitions. [2023-11-21 19:02:28,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2483 transitions. [2023-11-21 19:02:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 19:02:28,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:02:28,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 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 19:02:28,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:02:28,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:02:28,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:02:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1463635641, now seen corresponding path program 1 times [2023-11-21 19:02:28,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:02:28,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928363150] [2023-11-21 19:02:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:02:28,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:02:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:02:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:02:29,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:02:29,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928363150] [2023-11-21 19:02:29,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928363150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:02:29,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:02:29,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:02:29,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944529248] [2023-11-21 19:02:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:02:29,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:02:29,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:02:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:02:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:02:29,089 INFO L87 Difference]: Start difference. First operand 1806 states and 2483 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:31,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:02:33,126 INFO L93 Difference]: Finished difference Result 1808 states and 2484 transitions. [2023-11-21 19:02:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:02:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-21 19:02:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:02:33,144 INFO L225 Difference]: With dead ends: 1808 [2023-11-21 19:02:33,144 INFO L226 Difference]: Without dead ends: 1805 [2023-11-21 19:02:33,146 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 19:02:33,147 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 709 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-21 19:02:33,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 622 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-21 19:02:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2023-11-21 19:02:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1805. [2023-11-21 19:02:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1134 states have (on average 1.3324514991181657) internal successors, (1511), 1185 states have internal predecessors, (1511), 486 states have call successors, (486), 187 states have call predecessors, (486), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-21 19:02:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2481 transitions. [2023-11-21 19:02:33,324 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2481 transitions. Word has length 35 [2023-11-21 19:02:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:02:33,325 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 2481 transitions. [2023-11-21 19:02:33,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2481 transitions. [2023-11-21 19:02:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 19:02:33,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:02:33,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 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 19:02:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:02:33,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:02:33,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:02:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1871600435, now seen corresponding path program 1 times [2023-11-21 19:02:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:02:33,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664726655] [2023-11-21 19:02:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:02:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:02:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:02:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:02:33,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:02:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664726655] [2023-11-21 19:02:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664726655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:02:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:02:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:02:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074098733] [2023-11-21 19:02:33,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:02:33,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:02:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:02:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:02:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:02:33,570 INFO L87 Difference]: Start difference. First operand 1805 states and 2481 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:02:36,112 INFO L93 Difference]: Finished difference Result 1807 states and 2482 transitions. [2023-11-21 19:02:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:02:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-11-21 19:02:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:02:36,125 INFO L225 Difference]: With dead ends: 1807 [2023-11-21 19:02:36,126 INFO L226 Difference]: Without dead ends: 1798 [2023-11-21 19:02:36,127 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 19:02:36,128 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 706 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:02:36,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 621 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-21 19:02:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2023-11-21 19:02:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1798. [2023-11-21 19:02:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1128 states have (on average 1.3306737588652482) internal successors, (1501), 1178 states have internal predecessors, (1501), 485 states have call successors, (485), 187 states have call predecessors, (485), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-21 19:02:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2470 transitions. [2023-11-21 19:02:36,278 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2470 transitions. Word has length 36 [2023-11-21 19:02:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:02:36,278 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2470 transitions. [2023-11-21 19:02:36,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:02:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2470 transitions. [2023-11-21 19:02:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-21 19:02:36,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:02:36,286 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] [2023-11-21 19:02:36,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:02:36,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:02:36,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:02:36,287 INFO L85 PathProgramCache]: Analyzing trace with hash 883914338, now seen corresponding path program 1 times [2023-11-21 19:02:36,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:02:36,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852656590] [2023-11-21 19:02:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:02:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:02:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:02:36,562 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 19:02:36,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:02:36,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852656590] [2023-11-21 19:02:36,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852656590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:02:36,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:02:36,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:02:36,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408445937] [2023-11-21 19:02:36,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:02:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:02:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:02:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:02:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:02:36,567 INFO L87 Difference]: Start difference. First operand 1798 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 19:02:39,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:02:41,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []