./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:56:25,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:56:25,290 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 18:56:25,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:56:25,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:56:25,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:56:25,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:56:25,319 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:56:25,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:56:25,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:56:25,320 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:56:25,321 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:56:25,321 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:56:25,322 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:56:25,322 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:56:25,323 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:56:25,323 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:56:25,324 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:56:25,324 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:56:25,325 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:56:25,326 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:56:25,326 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:56:25,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:56:25,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:56:25,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:56:25,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:56:25,329 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:56:25,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:56:25,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:56:25,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:56:25,337 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:56:25,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:56:25,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:56:25,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:56:25,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:56:25,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:56:25,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:56:25,339 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:56:25,339 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:56:25,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:56:25,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:56:25,340 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:56:25,340 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:56:25,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:56:25,341 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_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e [2023-12-02 18:56:25,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:56:25,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:56:25,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:56:25,587 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:56:25,588 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:56:25,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2023-12-02 18:56:28,349 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:56:28,774 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:56:28,774 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2023-12-02 18:56:28,811 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/data/2679fd4e7/9603aedff7d749439f9bff7c495721f9/FLAG981be3b5f [2023-12-02 18:56:28,826 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/data/2679fd4e7/9603aedff7d749439f9bff7c495721f9 [2023-12-02 18:56:28,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:56:28,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:56:28,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:56:28,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:56:28,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:56:28,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:56:28" (1/1) ... [2023-12-02 18:56:28,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a82642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:28, skipping insertion in model container [2023-12-02 18:56:28,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:56:28" (1/1) ... [2023-12-02 18:56:28,959 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:56:30,463 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_cf549a75-f112-40b2-a010-d75058091259/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2023-12-02 18:56:30,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:56:30,539 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:56:30,701 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 %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6149-6150] [2023-12-02 18:56:30,703 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, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6158-6159] [2023-12-02 18:56:30,709 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [6355] [2023-12-02 18:56:30,710 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [6363] [2023-12-02 18:56:30,710 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; outsb": "+S" (addr), "+c" (count): "d" (port)); [6370] [2023-12-02 18:56:30,711 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; insb": "+D" (addr), "+c" (count): "d" (port)); [6377] [2023-12-02 18:56:30,845 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_cf549a75-f112-40b2-a010-d75058091259/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2023-12-02 18:56:30,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:56:30,941 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:56:30,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30 WrapperNode [2023-12-02 18:56:30,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:56:30,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:56:30,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:56:30,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:56:30,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,118 INFO L138 Inliner]: procedures = 228, calls = 2114, calls flagged for inlining = 106, calls inlined = 86, statements flattened = 3443 [2023-12-02 18:56:31,119 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:56:31,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:56:31,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:56:31,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:56:31,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,150 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,151 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,225 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,247 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:56:31,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:56:31,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:56:31,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:56:31,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (1/1) ... [2023-12-02 18:56:31,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:56:31,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:56:31,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:56:31,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:56:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure insb [2023-12-02 18:56:31,397 INFO L138 BoogieDeclarations]: Found implementation of procedure insb [2023-12-02 18:56:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692 [2023-12-02 18:56:31,397 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692 [2023-12-02 18:56:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_clear_bchannel [2023-12-02 18:56:31,397 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_clear_bchannel [2023-12-02 18:56:31,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 18:56:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 18:56:31,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 18:56:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 18:56:31,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-12-02 18:56:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-12-02 18:56:31,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 18:56:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 18:56:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_unregister_device [2023-12-02 18:56:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_unregister_device [2023-12-02 18:56:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692 [2023-12-02 18:56:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692 [2023-12-02 18:56:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure W6692B_interrupt [2023-12-02 18:56:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692B_interrupt [2023-12-02 18:56:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2023-12-02 18:56:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2023-12-02 18:56:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure outsb [2023-12-02 18:56:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure outsb [2023-12-02 18:56:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 18:56:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 18:56:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:56:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:56:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Bfifo [2023-12-02 18:56:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Bfifo [2023-12-02 18:56:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-12-02 18:56:31,401 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-12-02 18:56:31,401 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Bfifo [2023-12-02 18:56:31,401 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Bfifo [2023-12-02 18:56:31,401 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692B [2023-12-02 18:56:31,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692B [2023-12-02 18:56:31,401 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-12-02 18:56:31,401 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-12-02 18:56:31,401 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Dfifo [2023-12-02 18:56:31,401 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Dfifo [2023-12-02 18:56:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:56:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:56:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-12-02 18:56:31,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-12-02 18:56:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 18:56:31,402 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 18:56:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:56:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 18:56:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 18:56:31,402 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 18:56:31,403 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-12-02 18:56:31,403 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-12-02 18:56:31,403 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_led_handler [2023-12-02 18:56:31,403 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_led_handler [2023-12-02 18:56:31,403 INFO L130 BoogieDeclarations]: Found specification of procedure send_next [2023-12-02 18:56:31,403 INFO L138 BoogieDeclarations]: Found implementation of procedure send_next [2023-12-02 18:56:31,403 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 18:56:31,403 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 18:56:31,403 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-12-02 18:56:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-12-02 18:56:31,404 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692B [2023-12-02 18:56:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692B [2023-12-02 18:56:31,404 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2023-12-02 18:56:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2023-12-02 18:56:31,404 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2023-12-02 18:56:31,404 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2023-12-02 18:56:31,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:56:31,404 INFO L130 BoogieDeclarations]: Found specification of procedure ph_command [2023-12-02 18:56:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ph_command [2023-12-02 18:56:31,405 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-12-02 18:56:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-12-02 18:56:31,405 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2023-12-02 18:56:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2023-12-02 18:56:31,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-12-02 18:56:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-12-02 18:56:31,405 INFO L130 BoogieDeclarations]: Found specification of procedure _set_debug [2023-12-02 18:56:31,405 INFO L138 BoogieDeclarations]: Found implementation of procedure _set_debug [2023-12-02 18:56:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-12-02 18:56:31,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-12-02 18:56:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 18:56:31,406 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 18:56:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2023-12-02 18:56:31,406 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2023-12-02 18:56:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure disable_hwirq [2023-12-02 18:56:31,406 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_hwirq [2023-12-02 18:56:31,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:56:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_probe [2023-12-02 18:56:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_probe [2023-12-02 18:56:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2023-12-02 18:56:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2023-12-02 18:56:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_drvdata [2023-12-02 18:56:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_drvdata [2023-12-02 18:56:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-12-02 18:56:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-12-02 18:56:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 18:56:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 18:56:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 18:56:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 18:56:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:56:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-12-02 18:56:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-12-02 18:56:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_3 [2023-12-02 18:56:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_3 [2023-12-02 18:56:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-12-02 18:56:31,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-12-02 18:56:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:56:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure recv_Bchannel [2023-12-02 18:56:31,409 INFO L138 BoogieDeclarations]: Found implementation of procedure recv_Bchannel [2023-12-02 18:56:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock_irqsave [2023-12-02 18:56:31,409 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock_irqsave [2023-12-02 18:56:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:56:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-12-02 18:56:31,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-12-02 18:56:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_3 [2023-12-02 18:56:31,410 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_3 [2023-12-02 18:56:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irqrestore [2023-12-02 18:56:31,410 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irqrestore [2023-12-02 18:56:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Dfifo [2023-12-02 18:56:31,410 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Dfifo [2023-12-02 18:56:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_mode [2023-12-02 18:56:31,410 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_mode [2023-12-02 18:56:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure get_next_dframe [2023-12-02 18:56:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure get_next_dframe [2023-12-02 18:56:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure mI_alloc_skb [2023-12-02 18:56:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure mI_alloc_skb [2023-12-02 18:56:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-12-02 18:56:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-12-02 18:56:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2023-12-02 18:56:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2023-12-02 18:56:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 18:56:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 18:56:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-12-02 18:56:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-12-02 18:56:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:56:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2023-12-02 18:56:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2023-12-02 18:56:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:56:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:56:31,922 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:56:31,924 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:56:33,112 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 18:56:34,993 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:56:36,129 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:56:36,129 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-02 18:56:36,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:56:36 BoogieIcfgContainer [2023-12-02 18:56:36,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:56:36,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:56:36,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:56:36,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:56:36,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:56:28" (1/3) ... [2023-12-02 18:56:36,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26188469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:56:36, skipping insertion in model container [2023-12-02 18:56:36,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:56:30" (2/3) ... [2023-12-02 18:56:36,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26188469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:56:36, skipping insertion in model container [2023-12-02 18:56:36,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:56:36" (3/3) ... [2023-12-02 18:56:36,139 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2023-12-02 18:56:36,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:56:36,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:56:36,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:56:36,222 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;@291342b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:56:36,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:56:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 990 states, 605 states have (on average 1.333884297520661) internal successors, (807), 639 states have internal predecessors, (807), 321 states have call successors, (321), 63 states have call predecessors, (321), 62 states have return successors, (315), 309 states have call predecessors, (315), 315 states have call successors, (315) [2023-12-02 18:56:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 18:56:36,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:36,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-12-02 18:56:36,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:36,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:36,245 INFO L85 PathProgramCache]: Analyzing trace with hash -980486445, now seen corresponding path program 1 times [2023-12-02 18:56:36,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:36,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320086648] [2023-12-02 18:56:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:36,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:56:36,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320086648] [2023-12-02 18:56:36,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320086648] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:36,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:56:36,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:56:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372276579] [2023-12-02 18:56:36,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:36,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:56:36,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:56:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:56:36,919 INFO L87 Difference]: Start difference. First operand has 990 states, 605 states have (on average 1.333884297520661) internal successors, (807), 639 states have internal predecessors, (807), 321 states have call successors, (321), 63 states have call predecessors, (321), 62 states have return successors, (315), 309 states have call predecessors, (315), 315 states have call successors, (315) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:56:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:37,932 INFO L93 Difference]: Finished difference Result 2649 states and 3878 transitions. [2023-12-02 18:56:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:56:37,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-12-02 18:56:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:37,964 INFO L225 Difference]: With dead ends: 2649 [2023-12-02 18:56:37,964 INFO L226 Difference]: Without dead ends: 1649 [2023-12-02 18:56:37,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:56:37,981 INFO L413 NwaCegarLoop]: 1303 mSDtfsCounter, 985 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:37,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 2582 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:56:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2023-12-02 18:56:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1645. [2023-12-02 18:56:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1034 states have (on average 1.3336557059961316) internal successors, (1379), 1085 states have internal predecessors, (1379), 506 states have call successors, (506), 105 states have call predecessors, (506), 104 states have return successors, (505), 492 states have call predecessors, (505), 505 states have call successors, (505) [2023-12-02 18:56:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2390 transitions. [2023-12-02 18:56:38,179 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2390 transitions. Word has length 49 [2023-12-02 18:56:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:38,179 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2390 transitions. [2023-12-02 18:56:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:56:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2390 transitions. [2023-12-02 18:56:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 18:56:38,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:38,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:56:38,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:56:38,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:38,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1151265359, now seen corresponding path program 1 times [2023-12-02 18:56:38,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:38,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961938110] [2023-12-02 18:56:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:38,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 18:56:38,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961938110] [2023-12-02 18:56:38,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961938110] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:38,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:56:38,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:56:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918842969] [2023-12-02 18:56:38,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:56:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:56:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:56:38,628 INFO L87 Difference]: Start difference. First operand 1645 states and 2390 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:56:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:39,461 INFO L93 Difference]: Finished difference Result 3276 states and 4763 transitions. [2023-12-02 18:56:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:56:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 75 [2023-12-02 18:56:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:39,477 INFO L225 Difference]: With dead ends: 3276 [2023-12-02 18:56:39,477 INFO L226 Difference]: Without dead ends: 1645 [2023-12-02 18:56:39,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:56:39,489 INFO L413 NwaCegarLoop]: 1279 mSDtfsCounter, 0 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:39,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2555 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:56:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2023-12-02 18:56:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1645. [2023-12-02 18:56:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1034 states have (on average 1.332688588007737) internal successors, (1378), 1085 states have internal predecessors, (1378), 506 states have call successors, (506), 105 states have call predecessors, (506), 104 states have return successors, (505), 492 states have call predecessors, (505), 505 states have call successors, (505) [2023-12-02 18:56:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2389 transitions. [2023-12-02 18:56:39,599 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2389 transitions. Word has length 75 [2023-12-02 18:56:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:39,600 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2389 transitions. [2023-12-02 18:56:39,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:56:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2389 transitions. [2023-12-02 18:56:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 18:56:39,605 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:39,605 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:56:39,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:56:39,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:39,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2104474265, now seen corresponding path program 1 times [2023-12-02 18:56:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:39,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240012859] [2023-12-02 18:56:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-12-02 18:56:40,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:40,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240012859] [2023-12-02 18:56:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240012859] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:40,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:56:40,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:56:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926371570] [2023-12-02 18:56:40,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:40,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:56:40,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:40,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:56:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:56:40,589 INFO L87 Difference]: Start difference. First operand 1645 states and 2389 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:56:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:41,553 INFO L93 Difference]: Finished difference Result 1678 states and 2416 transitions. [2023-12-02 18:56:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:56:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2023-12-02 18:56:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:41,567 INFO L225 Difference]: With dead ends: 1678 [2023-12-02 18:56:41,567 INFO L226 Difference]: Without dead ends: 1675 [2023-12-02 18:56:41,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:56:41,571 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 395 mSDsluCounter, 2213 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3505 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:41,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 3505 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 18:56:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2023-12-02 18:56:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1675. [2023-12-02 18:56:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1051 states have (on average 1.3282588011417698) internal successors, (1396), 1102 states have internal predecessors, (1396), 509 states have call successors, (509), 115 states have call predecessors, (509), 114 states have return successors, (508), 495 states have call predecessors, (508), 508 states have call successors, (508) [2023-12-02 18:56:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2413 transitions. [2023-12-02 18:56:41,662 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2413 transitions. Word has length 87 [2023-12-02 18:56:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:41,662 INFO L495 AbstractCegarLoop]: Abstraction has 1675 states and 2413 transitions. [2023-12-02 18:56:41,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:56:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2413 transitions. [2023-12-02 18:56:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 18:56:41,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:41,666 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:56:41,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:56:41,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:41,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:41,667 INFO L85 PathProgramCache]: Analyzing trace with hash 945446112, now seen corresponding path program 1 times [2023-12-02 18:56:41,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:41,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083328006] [2023-12-02 18:56:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:41,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:42,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:42,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083328006] [2023-12-02 18:56:42,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083328006] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:42,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:56:42,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:56:42,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716999254] [2023-12-02 18:56:42,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:42,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:56:42,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:42,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:56:42,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:56:42,164 INFO L87 Difference]: Start difference. First operand 1675 states and 2413 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:43,724 INFO L93 Difference]: Finished difference Result 4931 states and 7108 transitions. [2023-12-02 18:56:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:56:43,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2023-12-02 18:56:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:43,744 INFO L225 Difference]: With dead ends: 4931 [2023-12-02 18:56:43,744 INFO L226 Difference]: Without dead ends: 3273 [2023-12-02 18:56:43,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:56:43,754 INFO L413 NwaCegarLoop]: 1278 mSDtfsCounter, 1294 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 5088 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:43,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 5088 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 18:56:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2023-12-02 18:56:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3257. [2023-12-02 18:56:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2057 states have (on average 1.3305785123966942) internal successors, (2737), 2159 states have internal predecessors, (2737), 974 states have call successors, (974), 226 states have call predecessors, (974), 225 states have return successors, (974), 946 states have call predecessors, (974), 973 states have call successors, (974) [2023-12-02 18:56:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4685 transitions. [2023-12-02 18:56:43,930 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4685 transitions. Word has length 89 [2023-12-02 18:56:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:43,930 INFO L495 AbstractCegarLoop]: Abstraction has 3257 states and 4685 transitions. [2023-12-02 18:56:43,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4685 transitions. [2023-12-02 18:56:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 18:56:43,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:43,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:56:43,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:56:43,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:43,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash 623541752, now seen corresponding path program 1 times [2023-12-02 18:56:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:43,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141472745] [2023-12-02 18:56:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:44,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141472745] [2023-12-02 18:56:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141472745] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:44,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:56:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:56:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643871078] [2023-12-02 18:56:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:56:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:56:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:56:44,295 INFO L87 Difference]: Start difference. First operand 3257 states and 4685 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:45,773 INFO L93 Difference]: Finished difference Result 6523 states and 9386 transitions. [2023-12-02 18:56:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:56:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2023-12-02 18:56:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:45,794 INFO L225 Difference]: With dead ends: 6523 [2023-12-02 18:56:45,794 INFO L226 Difference]: Without dead ends: 3283 [2023-12-02 18:56:45,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:56:45,809 INFO L413 NwaCegarLoop]: 1278 mSDtfsCounter, 1292 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 5088 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:45,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 5088 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 18:56:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2023-12-02 18:56:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 3267. [2023-12-02 18:56:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 2065 states have (on average 1.3292978208232447) internal successors, (2745), 2167 states have internal predecessors, (2745), 974 states have call successors, (974), 228 states have call predecessors, (974), 227 states have return successors, (974), 946 states have call predecessors, (974), 973 states have call successors, (974) [2023-12-02 18:56:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4693 transitions. [2023-12-02 18:56:46,011 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4693 transitions. Word has length 90 [2023-12-02 18:56:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:46,011 INFO L495 AbstractCegarLoop]: Abstraction has 3267 states and 4693 transitions. [2023-12-02 18:56:46,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4693 transitions. [2023-12-02 18:56:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 18:56:46,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:46,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:56:46,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:56:46,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:46,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash -591683525, now seen corresponding path program 1 times [2023-12-02 18:56:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082158157] [2023-12-02 18:56:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:46,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:46,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082158157] [2023-12-02 18:56:46,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082158157] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:46,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:56:46,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:56:46,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849626844] [2023-12-02 18:56:46,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:56:46,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:56:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:56:46,358 INFO L87 Difference]: Start difference. First operand 3267 states and 4693 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:47,796 INFO L93 Difference]: Finished difference Result 6543 states and 9400 transitions. [2023-12-02 18:56:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:56:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2023-12-02 18:56:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:47,818 INFO L225 Difference]: With dead ends: 6543 [2023-12-02 18:56:47,818 INFO L226 Difference]: Without dead ends: 3293 [2023-12-02 18:56:47,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:56:47,833 INFO L413 NwaCegarLoop]: 1278 mSDtfsCounter, 1293 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 5088 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:47,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 5088 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 18:56:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2023-12-02 18:56:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3277. [2023-12-02 18:56:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 2073 states have (on average 1.3280270139893873) internal successors, (2753), 2175 states have internal predecessors, (2753), 974 states have call successors, (974), 230 states have call predecessors, (974), 229 states have return successors, (974), 946 states have call predecessors, (974), 973 states have call successors, (974) [2023-12-02 18:56:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 4701 transitions. [2023-12-02 18:56:48,054 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 4701 transitions. Word has length 88 [2023-12-02 18:56:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:48,054 INFO L495 AbstractCegarLoop]: Abstraction has 3277 states and 4701 transitions. [2023-12-02 18:56:48,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 4701 transitions. [2023-12-02 18:56:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 18:56:48,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:48,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:56:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:56:48,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:48,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1690543299, now seen corresponding path program 1 times [2023-12-02 18:56:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:48,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296979081] [2023-12-02 18:56:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:48,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:48,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:48,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296979081] [2023-12-02 18:56:48,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296979081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:48,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:56:48,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:56:48,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308488112] [2023-12-02 18:56:48,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:48,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:56:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:56:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:56:48,386 INFO L87 Difference]: Start difference. First operand 3277 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:49,712 INFO L93 Difference]: Finished difference Result 6990 states and 9984 transitions. [2023-12-02 18:56:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:56:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2023-12-02 18:56:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:49,733 INFO L225 Difference]: With dead ends: 6990 [2023-12-02 18:56:49,734 INFO L226 Difference]: Without dead ends: 3730 [2023-12-02 18:56:49,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:56:49,747 INFO L413 NwaCegarLoop]: 1339 mSDtfsCounter, 461 mSDsluCounter, 3935 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 5274 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:49,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 5274 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 18:56:49,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2023-12-02 18:56:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3673. [2023-12-02 18:56:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 2327 states have (on average 1.3270305113880534) internal successors, (3088), 2434 states have internal predecessors, (3088), 1073 states have call successors, (1073), 273 states have call predecessors, (1073), 272 states have return successors, (1074), 1041 states have call predecessors, (1074), 1072 states have call successors, (1074) [2023-12-02 18:56:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 5235 transitions. [2023-12-02 18:56:49,959 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 5235 transitions. Word has length 87 [2023-12-02 18:56:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:49,960 INFO L495 AbstractCegarLoop]: Abstraction has 3673 states and 5235 transitions. [2023-12-02 18:56:49,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:56:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 5235 transitions. [2023-12-02 18:56:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 18:56:49,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:49,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:56:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 18:56:49,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:49,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:49,962 INFO L85 PathProgramCache]: Analyzing trace with hash 209670882, now seen corresponding path program 1 times [2023-12-02 18:56:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160101441] [2023-12-02 18:56:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:49,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 18:56:50,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:50,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160101441] [2023-12-02 18:56:50,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160101441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:56:50,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288611323] [2023-12-02 18:56:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:50,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:56:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:56:50,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:56:50,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:56:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:51,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 3033 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:56:51,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:56:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:51,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:56:51,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288611323] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:51,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:56:51,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 18:56:51,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101018909] [2023-12-02 18:56:51,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:51,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:56:51,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:56:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:56:51,463 INFO L87 Difference]: Start difference. First operand 3673 states and 5235 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:56:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:53,741 INFO L93 Difference]: Finished difference Result 8997 states and 12834 transitions. [2023-12-02 18:56:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:56:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 100 [2023-12-02 18:56:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:53,782 INFO L225 Difference]: With dead ends: 8997 [2023-12-02 18:56:53,782 INFO L226 Difference]: Without dead ends: 5737 [2023-12-02 18:56:53,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-12-02 18:56:53,801 INFO L413 NwaCegarLoop]: 2087 mSDtfsCounter, 1319 mSDsluCounter, 9614 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 11701 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:53,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 11701 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 18:56:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5737 states. [2023-12-02 18:56:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5737 to 5675. [2023-12-02 18:56:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5675 states, 3607 states have (on average 1.3285278624896035) internal successors, (4792), 3778 states have internal predecessors, (4792), 1637 states have call successors, (1637), 427 states have call predecessors, (1637), 430 states have return successors, (1650), 1583 states have call predecessors, (1650), 1636 states have call successors, (1650) [2023-12-02 18:56:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5675 states to 5675 states and 8079 transitions. [2023-12-02 18:56:54,213 INFO L78 Accepts]: Start accepts. Automaton has 5675 states and 8079 transitions. Word has length 100 [2023-12-02 18:56:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:54,214 INFO L495 AbstractCegarLoop]: Abstraction has 5675 states and 8079 transitions. [2023-12-02 18:56:54,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:56:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5675 states and 8079 transitions. [2023-12-02 18:56:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 18:56:54,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:54,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 18:56:54,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:56:54,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:56:54,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:54,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash 770659845, now seen corresponding path program 1 times [2023-12-02 18:56:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:54,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387560844] [2023-12-02 18:56:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:55,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387560844] [2023-12-02 18:56:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387560844] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:56:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086225007] [2023-12-02 18:56:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:56:55,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:56:55,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:56:55,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:56:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:55,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 3035 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:56:55,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:56:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:55,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:56:55,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086225007] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:55,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:56:55,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 18:56:55,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935503628] [2023-12-02 18:56:55,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:55,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:56:55,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:56:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:56:55,972 INFO L87 Difference]: Start difference. First operand 5675 states and 8079 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:56:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:56:58,138 INFO L93 Difference]: Finished difference Result 13023 states and 18542 transitions. [2023-12-02 18:56:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:56:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2023-12-02 18:56:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:56:58,179 INFO L225 Difference]: With dead ends: 13023 [2023-12-02 18:56:58,179 INFO L226 Difference]: Without dead ends: 7761 [2023-12-02 18:56:58,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:56:58,201 INFO L413 NwaCegarLoop]: 2093 mSDtfsCounter, 1319 mSDsluCounter, 9626 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 11719 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:56:58,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 11719 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:56:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2023-12-02 18:56:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 7083. [2023-12-02 18:56:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 4513 states have (on average 1.3283846665189454) internal successors, (5995), 4726 states have internal predecessors, (5995), 2017 states have call successors, (2017), 542 states have call predecessors, (2017), 552 states have return successors, (2045), 1948 states have call predecessors, (2045), 2016 states have call successors, (2045) [2023-12-02 18:56:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 10057 transitions. [2023-12-02 18:56:58,495 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 10057 transitions. Word has length 101 [2023-12-02 18:56:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:56:58,495 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 10057 transitions. [2023-12-02 18:56:58,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:56:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 10057 transitions. [2023-12-02 18:56:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 18:56:58,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:56:58,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 18:56:58,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 18:56:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:56:58,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:56:58,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:56:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -227104485, now seen corresponding path program 1 times [2023-12-02 18:56:58,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:56:58,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180085394] [2023-12-02 18:56:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:58,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:56:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:59,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:56:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180085394] [2023-12-02 18:56:59,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180085394] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:56:59,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804558582] [2023-12-02 18:56:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:56:59,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:56:59,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:56:59,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:56:59,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:56:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:56:59,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:56:59,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:56:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:56:59,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:56:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804558582] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:56:59,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:56:59,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 18:56:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668647499] [2023-12-02 18:56:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:56:59,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:56:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:56:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:56:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:56:59,951 INFO L87 Difference]: Start difference. First operand 7083 states and 10057 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:57:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:01,895 INFO L93 Difference]: Finished difference Result 15835 states and 22490 transitions. [2023-12-02 18:57:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:57:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2023-12-02 18:57:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:01,934 INFO L225 Difference]: With dead ends: 15835 [2023-12-02 18:57:01,935 INFO L226 Difference]: Without dead ends: 9165 [2023-12-02 18:57:01,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:57:01,948 INFO L413 NwaCegarLoop]: 2093 mSDtfsCounter, 1319 mSDsluCounter, 9626 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 11719 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:01,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 11719 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 18:57:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9165 states. [2023-12-02 18:57:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9165 to 7085. [2023-12-02 18:57:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 4515 states have (on average 1.3282392026578074) internal successors, (5997), 4726 states have internal predecessors, (5997), 2017 states have call successors, (2017), 542 states have call predecessors, (2017), 552 states have return successors, (2045), 1950 states have call predecessors, (2045), 2016 states have call successors, (2045) [2023-12-02 18:57:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 10059 transitions. [2023-12-02 18:57:02,350 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 10059 transitions. Word has length 102 [2023-12-02 18:57:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:02,350 INFO L495 AbstractCegarLoop]: Abstraction has 7085 states and 10059 transitions. [2023-12-02 18:57:02,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:57:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 10059 transitions. [2023-12-02 18:57:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 18:57:02,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:02,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 18:57:02,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:57:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 18:57:02,556 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:02,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1993386654, now seen corresponding path program 1 times [2023-12-02 18:57:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970053682] [2023-12-02 18:57:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:57:03,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970053682] [2023-12-02 18:57:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970053682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202580290] [2023-12-02 18:57:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:03,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:03,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:03,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:57:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:03,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 3039 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:57:03,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:57:03,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:57:03,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202580290] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:57:03,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:57:03,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 18:57:03,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203717004] [2023-12-02 18:57:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:57:03,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:57:03,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:57:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:57:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:57:03,890 INFO L87 Difference]: Start difference. First operand 7085 states and 10059 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:57:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:57:05,779 INFO L93 Difference]: Finished difference Result 15841 states and 22496 transitions. [2023-12-02 18:57:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:57:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2023-12-02 18:57:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:57:05,815 INFO L225 Difference]: With dead ends: 15841 [2023-12-02 18:57:05,815 INFO L226 Difference]: Without dead ends: 9169 [2023-12-02 18:57:05,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:57:05,832 INFO L413 NwaCegarLoop]: 2085 mSDtfsCounter, 1319 mSDsluCounter, 9594 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 11679 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:57:05,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 11679 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 18:57:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9169 states. [2023-12-02 18:57:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9169 to 7087. [2023-12-02 18:57:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 4517 states have (on average 1.3280938676112464) internal successors, (5999), 4726 states have internal predecessors, (5999), 2017 states have call successors, (2017), 542 states have call predecessors, (2017), 552 states have return successors, (2045), 1952 states have call predecessors, (2045), 2016 states have call successors, (2045) [2023-12-02 18:57:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 10061 transitions. [2023-12-02 18:57:06,415 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 10061 transitions. Word has length 103 [2023-12-02 18:57:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:57:06,416 INFO L495 AbstractCegarLoop]: Abstraction has 7087 states and 10061 transitions. [2023-12-02 18:57:06,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:57:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 10061 transitions. [2023-12-02 18:57:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 18:57:06,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:57:06,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:57:06,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:57:06,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:06,621 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:57:06,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:57:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash -892154384, now seen corresponding path program 1 times [2023-12-02 18:57:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:57:06,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135906470] [2023-12-02 18:57:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:06,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:57:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 18:57:07,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:57:07,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135906470] [2023-12-02 18:57:07,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135906470] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:57:07,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587503663] [2023-12-02 18:57:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:57:07,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:57:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:57:07,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:57:07,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf549a75-f112-40b2-a010-d75058091259/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:57:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:57:08,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:57:08,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:57:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 18:57:08,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:57:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 18:57:08,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587503663] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:57:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144683034] [2023-12-02 18:57:08,515 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2023-12-02 18:57:08,515 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:57:08,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:57:08,524 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:57:08,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:05:29,394 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_irq_1 with input of size 147 for LOIs [2023-12-02 19:05:29,560 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 2688 for LOIs [2023-12-02 19:09:07,885 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 2723 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 19:09:15,458 WARN L293 SmtUtils]: Spent 7.47s on a formula simplification that was a NOOP. DAG size: 2723 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 19:10:09,100 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 2713 for LOIs [2023-12-02 19:10:44,380 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 132 for LOIs [2023-12-02 19:10:44,424 INFO L180 IcfgInterpreter]: Interpretation finished