./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/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_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/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_27778ab3-1949-4611-9d76-13f36c0dbdc5/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 b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:30:35,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:30:35,570 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:30:35,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:30:35,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:30:35,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:30:35,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:30:35,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:30:35,601 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:30:35,602 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:30:35,602 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:30:35,603 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:30:35,603 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:30:35,604 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:30:35,604 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:30:35,605 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:30:35,605 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:30:35,606 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:30:35,607 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:30:35,607 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:30:35,608 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:30:35,609 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:30:35,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:30:35,610 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:30:35,611 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:30:35,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:30:35,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:30:35,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:30:35,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:30:35,613 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:30:35,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:30:35,614 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:30:35,614 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:30:35,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:30:35,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:30:35,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:30:35,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:30:35,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:30:35,616 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:30:35,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:30:35,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:30:35,617 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:30:35,617 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:30:35,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:30:35,617 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_27778ab3-1949-4611-9d76-13f36c0dbdc5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e [2023-12-02 17:30:35,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:30:35,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:30:35,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:30:35,845 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:30:35,845 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:30:35,846 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2023-12-02 17:30:38,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:30:39,077 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:30:39,078 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2023-12-02 17:30:39,110 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/data/f10f5748e/d3af6de804c14d3195b49bf467439b6d/FLAG4a050abec [2023-12-02 17:30:39,125 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/data/f10f5748e/d3af6de804c14d3195b49bf467439b6d [2023-12-02 17:30:39,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:30:39,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:30:39,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:30:39,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:30:39,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:30:39,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:30:39" (1/1) ... [2023-12-02 17:30:39,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b446be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:39, skipping insertion in model container [2023-12-02 17:30:39,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:30:39" (1/1) ... [2023-12-02 17:30:39,249 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:30:40,399 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_27778ab3-1949-4611-9d76-13f36c0dbdc5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2023-12-02 17:30:40,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:30:40,476 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:30:40,612 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5300] [2023-12-02 17:30:40,614 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5307] [2023-12-02 17:30:40,620 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [5446] [2023-12-02 17:30:40,621 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [5454] [2023-12-02 17:30:40,629 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1,%b0": "=a" (_v): "d" (port)); [5637] [2023-12-02 17:30:40,703 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_27778ab3-1949-4611-9d76-13f36c0dbdc5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2023-12-02 17:30:40,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:30:40,844 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:30:40,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40 WrapperNode [2023-12-02 17:30:40,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:30:40,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:30:40,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:30:40,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:30:40,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:40,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,020 INFO L138 Inliner]: procedures = 151, calls = 711, calls flagged for inlining = 70, calls inlined = 67, statements flattened = 2022 [2023-12-02 17:30:41,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:30:41,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:30:41,021 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:30:41,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:30:41,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,101 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,158 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:30:41,159 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:30:41,159 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:30:41,159 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:30:41,160 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (1/1) ... [2023-12-02 17:30:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:30:41,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:30:41,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:30:41,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:30:41,222 INFO L130 BoogieDeclarations]: Found specification of procedure atp_probe1 [2023-12-02 17:30:41,223 INFO L138 BoogieDeclarations]: Found implementation of procedure atp_probe1 [2023-12-02 17:30:41,223 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-12-02 17:30:41,223 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-12-02 17:30:41,223 INFO L130 BoogieDeclarations]: Found specification of procedure read_block [2023-12-02 17:30:41,223 INFO L138 BoogieDeclarations]: Found implementation of procedure read_block [2023-12-02 17:30:41,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 17:30:41,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 17:30:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:30:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 17:30:41,224 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 17:30:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2023-12-02 17:30:41,224 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2023-12-02 17:30:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2023-12-02 17:30:41,224 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2023-12-02 17:30:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure write_byte_mode0 [2023-12-02 17:30:41,225 INFO L138 BoogieDeclarations]: Found implementation of procedure write_byte_mode0 [2023-12-02 17:30:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure write_byte_mode1 [2023-12-02 17:30:41,225 INFO L138 BoogieDeclarations]: Found implementation of procedure write_byte_mode1 [2023-12-02 17:30:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-12-02 17:30:41,225 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-12-02 17:30:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-12-02 17:30:41,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-12-02 17:30:41,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 17:30:41,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 17:30:41,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-12-02 17:30:41,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-12-02 17:30:41,226 INFO L130 BoogieDeclarations]: Found specification of procedure tx_timeout [2023-12-02 17:30:41,226 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_timeout [2023-12-02 17:30:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:30:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure net_rx [2023-12-02 17:30:41,227 INFO L138 BoogieDeclarations]: Found implementation of procedure net_rx [2023-12-02 17:30:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 17:30:41,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 17:30:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg_high [2023-12-02 17:30:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg_high [2023-12-02 17:30:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 17:30:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 17:30:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:30:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:30:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-12-02 17:30:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-12-02 17:30:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure read_nibble [2023-12-02 17:30:41,229 INFO L138 BoogieDeclarations]: Found implementation of procedure read_nibble [2023-12-02 17:30:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:30:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure hardware_init [2023-12-02 17:30:41,229 INFO L138 BoogieDeclarations]: Found implementation of procedure hardware_init [2023-12-02 17:30:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:30:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:30:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:30:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-12-02 17:30:41,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-12-02 17:30:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2023-12-02 17:30:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2023-12-02 17:30:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2023-12-02 17:30:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2023-12-02 17:30:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:30:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-12-02 17:30:41,231 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-12-02 17:30:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg_byte [2023-12-02 17:30:41,231 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg_byte [2023-12-02 17:30:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-12-02 17:30:41,231 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-12-02 17:30:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-12-02 17:30:41,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-12-02 17:30:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:30:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:30:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure inbyte [2023-12-02 17:30:41,232 INFO L138 BoogieDeclarations]: Found implementation of procedure inbyte [2023-12-02 17:30:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 17:30:41,232 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 17:30:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_send [2023-12-02 17:30:41,232 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_send [2023-12-02 17:30:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-12-02 17:30:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-12-02 17:30:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 17:30:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 17:30:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2023-12-02 17:30:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2023-12-02 17:30:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-12-02 17:30:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-12-02 17:30:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 17:30:41,234 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 17:30:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-12-02 17:30:41,234 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-12-02 17:30:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_op [2023-12-02 17:30:41,234 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_op [2023-12-02 17:30:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-12-02 17:30:41,234 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-12-02 17:30:41,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:30:41,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:30:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:30:41,578 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:30:41,580 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:30:42,277 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 17:30:43,259 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:30:44,032 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:30:44,032 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:30:44,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:30:44 BoogieIcfgContainer [2023-12-02 17:30:44,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:30:44,037 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:30:44,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:30:44,040 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:30:44,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:30:39" (1/3) ... [2023-12-02 17:30:44,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73284f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:30:44, skipping insertion in model container [2023-12-02 17:30:44,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:30:40" (2/3) ... [2023-12-02 17:30:44,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73284f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:30:44, skipping insertion in model container [2023-12-02 17:30:44,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:30:44" (3/3) ... [2023-12-02 17:30:44,044 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2023-12-02 17:30:44,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:30:44,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:30:44,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:30:44,133 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;@3efffd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:30:44,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:30:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 656 states, 372 states have (on average 1.3225806451612903) internal successors, (492), 387 states have internal predecessors, (492), 243 states have call successors, (243), 40 states have call predecessors, (243), 39 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) [2023-12-02 17:30:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-12-02 17:30:44,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:44,178 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:44,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:44,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1953658889, now seen corresponding path program 1 times [2023-12-02 17:30:44,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:44,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095018760] [2023-12-02 17:30:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:44,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-12-02 17:30:45,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095018760] [2023-12-02 17:30:45,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095018760] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:45,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:45,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:30:45,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045641942] [2023-12-02 17:30:45,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:45,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:30:45,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:30:45,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:30:45,099 INFO L87 Difference]: Start difference. First operand has 656 states, 372 states have (on average 1.3225806451612903) internal successors, (492), 387 states have internal predecessors, (492), 243 states have call successors, (243), 40 states have call predecessors, (243), 39 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-02 17:30:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:46,048 INFO L93 Difference]: Finished difference Result 1954 states and 2916 transitions. [2023-12-02 17:30:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:30:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 237 [2023-12-02 17:30:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:46,075 INFO L225 Difference]: With dead ends: 1954 [2023-12-02 17:30:46,075 INFO L226 Difference]: Without dead ends: 1278 [2023-12-02 17:30:46,085 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 17:30:46,088 INFO L413 NwaCegarLoop]: 915 mSDtfsCounter, 956 mSDsluCounter, 2674 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 3589 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:46,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 3589 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:30:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2023-12-02 17:30:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1264. [2023-12-02 17:30:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 722 states have (on average 1.3047091412742382) internal successors, (942), 743 states have internal predecessors, (942), 465 states have call successors, (465), 77 states have call predecessors, (465), 76 states have return successors, (464), 455 states have call predecessors, (464), 464 states have call successors, (464) [2023-12-02 17:30:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1871 transitions. [2023-12-02 17:30:46,246 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1871 transitions. Word has length 237 [2023-12-02 17:30:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:46,247 INFO L495 AbstractCegarLoop]: Abstraction has 1264 states and 1871 transitions. [2023-12-02 17:30:46,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-02 17:30:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1871 transitions. [2023-12-02 17:30:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-02 17:30:46,262 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:46,263 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:46,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:30:46,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:46,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 645764014, now seen corresponding path program 1 times [2023-12-02 17:30:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:46,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712246763] [2023-12-02 17:30:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:46,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:30:46,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712246763] [2023-12-02 17:30:46,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712246763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:46,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:46,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:30:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998694094] [2023-12-02 17:30:46,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:30:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:30:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:30:46,727 INFO L87 Difference]: Start difference. First operand 1264 states and 1871 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-12-02 17:30:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:47,627 INFO L93 Difference]: Finished difference Result 2842 states and 4196 transitions. [2023-12-02 17:30:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:30:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 266 [2023-12-02 17:30:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:47,644 INFO L225 Difference]: With dead ends: 2842 [2023-12-02 17:30:47,645 INFO L226 Difference]: Without dead ends: 1908 [2023-12-02 17:30:47,650 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 17:30:47,651 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 930 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:47,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 4256 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:30:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2023-12-02 17:30:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1889. [2023-12-02 17:30:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1081 states have (on average 1.3043478260869565) internal successors, (1410), 1110 states have internal predecessors, (1410), 693 states have call successors, (693), 115 states have call predecessors, (693), 114 states have return successors, (692), 681 states have call predecessors, (692), 692 states have call successors, (692) [2023-12-02 17:30:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2795 transitions. [2023-12-02 17:30:47,801 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2795 transitions. Word has length 266 [2023-12-02 17:30:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:47,802 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 2795 transitions. [2023-12-02 17:30:47,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-12-02 17:30:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2795 transitions. [2023-12-02 17:30:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-12-02 17:30:47,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:47,814 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:47,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:30:47,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:47,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1540521126, now seen corresponding path program 1 times [2023-12-02 17:30:47,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:47,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901174290] [2023-12-02 17:30:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:47,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-12-02 17:30:48,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:48,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901174290] [2023-12-02 17:30:48,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901174290] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:48,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:48,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:30:48,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850898978] [2023-12-02 17:30:48,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:48,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:30:48,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:30:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:30:48,119 INFO L87 Difference]: Start difference. First operand 1889 states and 2795 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-02 17:30:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:49,044 INFO L93 Difference]: Finished difference Result 3472 states and 5122 transitions. [2023-12-02 17:30:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:30:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 239 [2023-12-02 17:30:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:49,058 INFO L225 Difference]: With dead ends: 3472 [2023-12-02 17:30:49,058 INFO L226 Difference]: Without dead ends: 1912 [2023-12-02 17:30:49,066 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 17:30:49,067 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 928 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:49,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 4256 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:30:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2023-12-02 17:30:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1893. [2023-12-02 17:30:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1085 states have (on average 1.303225806451613) internal successors, (1414), 1113 states have internal predecessors, (1414), 692 states have call successors, (692), 116 states have call predecessors, (692), 115 states have return successors, (691), 681 states have call predecessors, (691), 691 states have call successors, (691) [2023-12-02 17:30:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2797 transitions. [2023-12-02 17:30:49,179 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2797 transitions. Word has length 239 [2023-12-02 17:30:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:49,179 INFO L495 AbstractCegarLoop]: Abstraction has 1893 states and 2797 transitions. [2023-12-02 17:30:49,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-02 17:30:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2797 transitions. [2023-12-02 17:30:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-12-02 17:30:49,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:49,190 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:49,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:30:49,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:49,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:49,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1466379100, now seen corresponding path program 1 times [2023-12-02 17:30:49,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:49,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236372001] [2023-12-02 17:30:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:49,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-12-02 17:30:49,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:49,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236372001] [2023-12-02 17:30:49,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236372001] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:49,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:49,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:30:49,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63599566] [2023-12-02 17:30:49,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:49,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:30:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:49,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:30:49,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:30:49,493 INFO L87 Difference]: Start difference. First operand 1893 states and 2797 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-02 17:30:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:50,415 INFO L93 Difference]: Finished difference Result 3300 states and 4843 transitions. [2023-12-02 17:30:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:30:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 240 [2023-12-02 17:30:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:50,428 INFO L225 Difference]: With dead ends: 3300 [2023-12-02 17:30:50,428 INFO L226 Difference]: Without dead ends: 1735 [2023-12-02 17:30:50,435 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 17:30:50,436 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 926 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:50,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 4256 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:30:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-12-02 17:30:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1719. [2023-12-02 17:30:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 987 states have (on average 1.297872340425532) internal successors, (1281), 1009 states have internal predecessors, (1281), 619 states have call successors, (619), 113 states have call predecessors, (619), 112 states have return successors, (618), 611 states have call predecessors, (618), 618 states have call successors, (618) [2023-12-02 17:30:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2518 transitions. [2023-12-02 17:30:50,540 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2518 transitions. Word has length 240 [2023-12-02 17:30:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:50,541 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2518 transitions. [2023-12-02 17:30:50,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-02 17:30:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2518 transitions. [2023-12-02 17:30:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-12-02 17:30:50,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:50,551 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:50,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:30:50,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:50,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:50,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1915890922, now seen corresponding path program 1 times [2023-12-02 17:30:50,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:50,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307038519] [2023-12-02 17:30:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2023-12-02 17:30:51,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:51,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307038519] [2023-12-02 17:30:51,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307038519] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:30:51,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968983569] [2023-12-02 17:30:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:51,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:30:51,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:30:51,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:30:51,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:30:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:51,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:30:51,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:30:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:30:52,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:30:52,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968983569] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:52,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:30:52,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 17:30:52,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861058851] [2023-12-02 17:30:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:52,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:30:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:30:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:30:52,047 INFO L87 Difference]: Start difference. First operand 1719 states and 2518 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:30:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:53,417 INFO L93 Difference]: Finished difference Result 4103 states and 6010 transitions. [2023-12-02 17:30:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:30:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) Word has length 277 [2023-12-02 17:30:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:53,437 INFO L225 Difference]: With dead ends: 4103 [2023-12-02 17:30:53,437 INFO L226 Difference]: Without dead ends: 2831 [2023-12-02 17:30:53,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 275 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 17:30:53,445 INFO L413 NwaCegarLoop]: 1145 mSDtfsCounter, 953 mSDsluCounter, 5418 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 6563 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:53,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 6563 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 17:30:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2023-12-02 17:30:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2798. [2023-12-02 17:30:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 1609 states have (on average 1.2989434431323803) internal successors, (2090), 1649 states have internal predecessors, (2090), 1002 states have call successors, (1002), 185 states have call predecessors, (1002), 186 states have return successors, (1006), 987 states have call predecessors, (1006), 1001 states have call successors, (1006) [2023-12-02 17:30:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4098 transitions. [2023-12-02 17:30:53,642 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4098 transitions. Word has length 277 [2023-12-02 17:30:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:53,643 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 4098 transitions. [2023-12-02 17:30:53,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:30:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4098 transitions. [2023-12-02 17:30:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-12-02 17:30:53,664 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:53,664 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:53,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:30:53,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:30:53,865 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:53,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash -236443195, now seen corresponding path program 1 times [2023-12-02 17:30:53,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:53,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334635340] [2023-12-02 17:30:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:53,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:30:54,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:54,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334635340] [2023-12-02 17:30:54,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334635340] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:30:54,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532254568] [2023-12-02 17:30:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:54,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:30:54,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:30:54,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:30:54,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:30:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:55,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:30:55,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:30:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:30:55,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:30:55,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532254568] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:55,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:30:55,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 17:30:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480843170] [2023-12-02 17:30:55,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:55,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:30:55,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:55,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:30:55,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:30:55,225 INFO L87 Difference]: Start difference. First operand 2798 states and 4098 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:30:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:56,522 INFO L93 Difference]: Finished difference Result 6272 states and 9180 transitions. [2023-12-02 17:30:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:30:56,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) Word has length 278 [2023-12-02 17:30:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:56,570 INFO L225 Difference]: With dead ends: 6272 [2023-12-02 17:30:56,570 INFO L226 Difference]: Without dead ends: 3921 [2023-12-02 17:30:56,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 275 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 17:30:56,584 INFO L413 NwaCegarLoop]: 1158 mSDtfsCounter, 953 mSDsluCounter, 5458 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:56,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 6616 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:30:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2023-12-02 17:30:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3882. [2023-12-02 17:30:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3882 states, 2234 states have (on average 1.2990152193375113) internal successors, (2902), 2295 states have internal predecessors, (2902), 1385 states have call successors, (1385), 257 states have call predecessors, (1385), 262 states have return successors, (1397), 1362 states have call predecessors, (1397), 1384 states have call successors, (1397) [2023-12-02 17:30:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 5684 transitions. [2023-12-02 17:30:56,958 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 5684 transitions. Word has length 278 [2023-12-02 17:30:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:56,958 INFO L495 AbstractCegarLoop]: Abstraction has 3882 states and 5684 transitions. [2023-12-02 17:30:56,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:30:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 5684 transitions. [2023-12-02 17:30:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-12-02 17:30:56,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:56,992 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:57,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:30:57,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 17:30:57,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:57,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:57,193 INFO L85 PathProgramCache]: Analyzing trace with hash -848714479, now seen corresponding path program 1 times [2023-12-02 17:30:57,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:57,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583177608] [2023-12-02 17:30:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:57,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:30:57,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583177608] [2023-12-02 17:30:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583177608] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:30:57,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972464491] [2023-12-02 17:30:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:57,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:30:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:30:57,907 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:30:57,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:30:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:58,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:30:58,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:30:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:30:58,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:30:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972464491] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:58,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:30:58,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 17:30:58,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139993864] [2023-12-02 17:30:58,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:58,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:30:58,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:30:58,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:30:58,593 INFO L87 Difference]: Start difference. First operand 3882 states and 5684 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:30:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:59,750 INFO L93 Difference]: Finished difference Result 8438 states and 12348 transitions. [2023-12-02 17:30:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:30:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) Word has length 279 [2023-12-02 17:30:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:59,777 INFO L225 Difference]: With dead ends: 8438 [2023-12-02 17:30:59,777 INFO L226 Difference]: Without dead ends: 5003 [2023-12-02 17:30:59,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 276 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 17:30:59,793 INFO L413 NwaCegarLoop]: 1158 mSDtfsCounter, 953 mSDsluCounter, 5458 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:59,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 6616 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:30:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2023-12-02 17:31:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 3883. [2023-12-02 17:31:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 2235 states have (on average 1.2988814317673378) internal successors, (2903), 2295 states have internal predecessors, (2903), 1385 states have call successors, (1385), 257 states have call predecessors, (1385), 262 states have return successors, (1397), 1363 states have call predecessors, (1397), 1384 states have call successors, (1397) [2023-12-02 17:31:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 5685 transitions. [2023-12-02 17:31:00,135 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 5685 transitions. Word has length 279 [2023-12-02 17:31:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:00,136 INFO L495 AbstractCegarLoop]: Abstraction has 3883 states and 5685 transitions. [2023-12-02 17:31:00,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:31:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 5685 transitions. [2023-12-02 17:31:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-12-02 17:31:00,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:00,167 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:00,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:31:00,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 17:31:00,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:00,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash -963678196, now seen corresponding path program 1 times [2023-12-02 17:31:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:00,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410856814] [2023-12-02 17:31:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:31:00,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:00,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410856814] [2023-12-02 17:31:00,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410856814] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:00,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756772432] [2023-12-02 17:31:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:00,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:00,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:31:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:01,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:31:01,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-12-02 17:31:01,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:31:01,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756772432] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:01,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:31:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 17:31:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995731187] [2023-12-02 17:31:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:01,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:31:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:31:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:31:01,583 INFO L87 Difference]: Start difference. First operand 3883 states and 5685 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:31:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:02,789 INFO L93 Difference]: Finished difference Result 8441 states and 12351 transitions. [2023-12-02 17:31:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:31:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) Word has length 280 [2023-12-02 17:31:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:02,815 INFO L225 Difference]: With dead ends: 8441 [2023-12-02 17:31:02,815 INFO L226 Difference]: Without dead ends: 5005 [2023-12-02 17:31:02,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 277 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 17:31:02,829 INFO L413 NwaCegarLoop]: 1158 mSDtfsCounter, 953 mSDsluCounter, 5458 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:02,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 6616 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:31:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2023-12-02 17:31:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3884. [2023-12-02 17:31:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 2236 states have (on average 1.298747763864043) internal successors, (2904), 2295 states have internal predecessors, (2904), 1385 states have call successors, (1385), 257 states have call predecessors, (1385), 262 states have return successors, (1397), 1364 states have call predecessors, (1397), 1384 states have call successors, (1397) [2023-12-02 17:31:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 5686 transitions. [2023-12-02 17:31:03,115 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 5686 transitions. Word has length 280 [2023-12-02 17:31:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:03,115 INFO L495 AbstractCegarLoop]: Abstraction has 3884 states and 5686 transitions. [2023-12-02 17:31:03,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:31:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 5686 transitions. [2023-12-02 17:31:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-12-02 17:31:03,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:03,134 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:31:03,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:31:03,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:03,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:03,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1800882939, now seen corresponding path program 1 times [2023-12-02 17:31:03,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:03,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890829061] [2023-12-02 17:31:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:03,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1658 trivial. 0 not checked. [2023-12-02 17:31:03,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:03,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890829061] [2023-12-02 17:31:03,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890829061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:03,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:03,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:31:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782466649] [2023-12-02 17:31:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:03,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:31:03,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:31:03,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:31:03,531 INFO L87 Difference]: Start difference. First operand 3884 states and 5686 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:31:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:04,237 INFO L93 Difference]: Finished difference Result 10356 states and 15154 transitions. [2023-12-02 17:31:04,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:31:04,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 282 [2023-12-02 17:31:04,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:04,289 INFO L225 Difference]: With dead ends: 10356 [2023-12-02 17:31:04,290 INFO L226 Difference]: Without dead ends: 6478 [2023-12-02 17:31:04,309 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 17:31:04,310 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 685 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:04,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1633 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:31:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2023-12-02 17:31:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 6468. [2023-12-02 17:31:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 3734 states have (on average 1.289234065345474) internal successors, (4814), 3832 states have internal predecessors, (4814), 2297 states have call successors, (2297), 425 states have call predecessors, (2297), 436 states have return successors, (2350), 2255 states have call predecessors, (2350), 2296 states have call successors, (2350) [2023-12-02 17:31:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 9461 transitions. [2023-12-02 17:31:04,761 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 9461 transitions. Word has length 282 [2023-12-02 17:31:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:04,762 INFO L495 AbstractCegarLoop]: Abstraction has 6468 states and 9461 transitions. [2023-12-02 17:31:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2023-12-02 17:31:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 9461 transitions. [2023-12-02 17:31:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-12-02 17:31:04,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:04,769 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:04,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:31:04,769 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:04,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash -180045305, now seen corresponding path program 1 times [2023-12-02 17:31:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:04,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464234777] [2023-12-02 17:31:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:04,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2023-12-02 17:31:05,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464234777] [2023-12-02 17:31:05,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464234777] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111663669] [2023-12-02 17:31:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:05,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:05,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:05,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:05,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:31:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:05,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 1959 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:31:05,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2023-12-02 17:31:05,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2023-12-02 17:31:06,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111663669] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:06,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675035017] [2023-12-02 17:31:06,273 INFO L159 IcfgInterpreter]: Started Sifa with 136 locations of interest [2023-12-02 17:31:06,274 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:06,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:31:06,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:31:06,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:31:55,761 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 1377 for LOIs [2023-12-02 17:33:11,802 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 1401 for LOIs [2023-12-02 17:33:21,937 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 119 for LOIs [2023-12-02 17:33:21,966 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:33:30,099 WARN L293 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 887 DAG size of output: 885 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:34:21,990 WARN L293 SmtUtils]: Spent 51.14s on a formula simplification. DAG size of input: 1377 DAG size of output: 1368 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:35:23,235 WARN L293 SmtUtils]: Spent 1.00m on a formula simplification. DAG size of input: 1397 DAG size of output: 1388 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:36:25,727 WARN L293 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 1401 DAG size of output: 1392 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:37:27,973 WARN L293 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 1402 DAG size of output: 1393 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:37:46,337 WARN L293 SmtUtils]: Spent 13.69s on a formula simplification. DAG size of input: 1135 DAG size of output: 1132 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:38:02,135 WARN L293 SmtUtils]: Spent 14.67s on a formula simplification. DAG size of input: 1139 DAG size of output: 1136 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:38:18,374 WARN L293 SmtUtils]: Spent 14.99s on a formula simplification. DAG size of input: 1152 DAG size of output: 1147 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:38:35,741 WARN L293 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 1182 DAG size of output: 1177 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:38:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [675035017] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:38:35,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:38:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [8, 10, 10] total 33 [2023-12-02 17:38:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435868502] [2023-12-02 17:38:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:38:35,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:38:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:38:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:38:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=928, Unknown=2, NotChecked=0, Total=1056 [2023-12-02 17:38:35,752 INFO L87 Difference]: Start difference. First operand 6468 states and 9461 transitions. Second operand has 17 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2023-12-02 17:40:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:21,238 INFO L93 Difference]: Finished difference Result 12925 states and 18908 transitions. [2023-12-02 17:40:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:40:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) Word has length 292 [2023-12-02 17:40:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:21,271 INFO L225 Difference]: With dead ends: 12925 [2023-12-02 17:40:21,271 INFO L226 Difference]: Without dead ends: 6471 [2023-12-02 17:40:21,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 844 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 313.9s TimeCoverageRelationStatistics Valid=126, Invalid=928, Unknown=2, NotChecked=0, Total=1056 [2023-12-02 17:40:21,300 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 0 mSDsluCounter, 8305 mSDsCounter, 0 mSdLazyCounter, 5087 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9142 SdHoareTripleChecker+Invalid, 5087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:21,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9142 Invalid, 5087 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 5087 Invalid, 0 Unknown, 0 Unchecked, 105.0s Time] [2023-12-02 17:40:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2023-12-02 17:40:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 6471. [2023-12-02 17:40:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6471 states, 3736 states have (on average 1.2890792291220556) internal successors, (4816), 3834 states have internal predecessors, (4816), 2297 states have call successors, (2297), 426 states have call predecessors, (2297), 437 states have return successors, (2350), 2255 states have call predecessors, (2350), 2296 states have call successors, (2350) [2023-12-02 17:40:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6471 states to 6471 states and 9463 transitions. [2023-12-02 17:40:21,787 INFO L78 Accepts]: Start accepts. Automaton has 6471 states and 9463 transitions. Word has length 292 [2023-12-02 17:40:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:21,787 INFO L495 AbstractCegarLoop]: Abstraction has 6471 states and 9463 transitions. [2023-12-02 17:40:21,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (47), 4 states have call predecessors, (47), 4 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2023-12-02 17:40:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6471 states and 9463 transitions. [2023-12-02 17:40:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-12-02 17:40:21,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:21,794 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:40:21,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 17:40:21,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:40:21,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:21,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2079422664, now seen corresponding path program 1 times [2023-12-02 17:40:21,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:21,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940885105] [2023-12-02 17:40:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2023-12-02 17:40:22,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:22,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940885105] [2023-12-02 17:40:22,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940885105] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:40:22,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75172543] [2023-12-02 17:40:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:22,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:40:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:40:22,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:40:22,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27778ab3-1949-4611-9d76-13f36c0dbdc5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:40:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:23,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:40:23,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:40:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2023-12-02 17:40:23,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:40:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2023-12-02 17:40:23,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75172543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:40:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546620574] [2023-12-02 17:40:23,616 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2023-12-02 17:40:23,616 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:40:23,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:40:23,617 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:40:23,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:41:23,487 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_irq_1 with input of size 131 for LOIs [2023-12-02 17:41:23,633 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 1377 for LOIs [2023-12-02 17:42:37,924 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 1401 for LOIs [2023-12-02 17:42:48,388 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 119 for LOIs [2023-12-02 17:42:48,435 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:42:57,597 WARN L293 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 887 DAG size of output: 885 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:43:51,132 WARN L293 SmtUtils]: Spent 52.81s on a formula simplification. DAG size of input: 1377 DAG size of output: 1368 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)