./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.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_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/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_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/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_2e83d5a6-8345-40a3-a0df-a9133ee8d426/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 7d6844ab51374c8e656234daa6d7df2c3927c38bae9fcbeafc3fadf6f3b893b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:00:36,749 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:00:36,816 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 19:00:36,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:00:36,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:00:36,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:00:36,844 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:00:36,845 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:00:36,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:00:36,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:00:36,846 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:00:36,847 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:00:36,847 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:00:36,848 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:00:36,849 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:00:36,849 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:00:36,850 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:00:36,850 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:00:36,851 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:00:36,851 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:00:36,852 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:00:36,853 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:00:36,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:00:36,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:00:36,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:00:36,855 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:00:36,855 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:00:36,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:00:36,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:00:36,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:00:36,857 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:00:36,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:00:36,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:00:36,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:00:36,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:00:36,858 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:00:36,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:00:36,859 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:00:36,859 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:00:36,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:00:36,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:00:36,860 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:00:36,860 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:00:36,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:00:36,860 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_2e83d5a6-8345-40a3-a0df-a9133ee8d426/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d6844ab51374c8e656234daa6d7df2c3927c38bae9fcbeafc3fadf6f3b893b1 [2023-12-02 19:00:37,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:00:37,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:00:37,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:00:37,087 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:00:37,088 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:00:37,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2023-12-02 19:00:39,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:00:40,248 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:00:40,248 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2023-12-02 19:00:40,271 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/data/736cbada0/6e865fb16c3a446da2027956aca6d32a/FLAG4a963ad6e [2023-12-02 19:00:40,284 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/data/736cbada0/6e865fb16c3a446da2027956aca6d32a [2023-12-02 19:00:40,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:00:40,287 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:00:40,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:00:40,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:00:40,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:00:40,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:00:40" (1/1) ... [2023-12-02 19:00:40,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29b577fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:40, skipping insertion in model container [2023-12-02 19:00:40,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:00:40" (1/1) ... [2023-12-02 19:00:40,359 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:00:40,982 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_2e83d5a6-8345-40a3-a0df-a9133ee8d426/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i[132927,132940] [2023-12-02 19:00:41,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:00:41,119 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:00:41,154 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [1076] [2023-12-02 19:00:41,157 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [1083] [2023-12-02 19:00:41,231 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_2e83d5a6-8345-40a3-a0df-a9133ee8d426/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i[132927,132940] [2023-12-02 19:00:41,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:00:41,368 WARN L675 CHandler]: The function strcspn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:00:41,368 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:00:41,374 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:00:41,374 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41 WrapperNode [2023-12-02 19:00:41,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:00:41,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:00:41,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:00:41,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:00:41,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,658 INFO L138 Inliner]: procedures = 133, calls = 5580, calls flagged for inlining = 57, calls inlined = 51, statements flattened = 6755 [2023-12-02 19:00:41,658 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:00:41,659 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:00:41,659 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:00:41,659 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:00:41,666 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,818 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:00:41,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:00:41,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:00:41,924 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:00:41,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (1/1) ... [2023-12-02 19:00:41,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:00:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:00:41,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:00:41,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:00:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_while_busy [2023-12-02 19:00:41,984 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_while_busy [2023-12-02 19:00:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-12-02 19:00:41,984 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-12-02 19:00:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_for_read [2023-12-02 19:00:41,985 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_for_read [2023-12-02 19:00:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-12-02 19:00:41,985 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-12-02 19:00:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2023-12-02 19:00:41,985 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2023-12-02 19:00:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure dmi_get_system_info [2023-12-02 19:00:41,985 INFO L138 BoogieDeclarations]: Found implementation of procedure dmi_get_system_info [2023-12-02 19:00:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:00:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read [2023-12-02 19:00:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read [2023-12-02 19:00:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 19:00:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 19:00:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:00:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 19:00:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 19:00:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 19:00:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 19:00:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2023-12-02 19:00:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2023-12-02 19:00:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2023-12-02 19:00:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2023-12-02 19:00:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_suspend [2023-12-02 19:00:41,988 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_suspend [2023-12-02 19:00:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read_increment_offset [2023-12-02 19:00:41,988 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read_increment_offset [2023-12-02 19:00:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 19:00:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2023-12-02 19:00:41,988 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2023-12-02 19:00:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-02 19:00:41,988 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-02 19:00:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:00:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 19:00:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:00:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_update_device [2023-12-02 19:00:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_update_device [2023-12-02 19:00:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 19:00:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:00:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure platform_set_drvdata [2023-12-02 19:00:41,989 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_set_drvdata [2023-12-02 19:00:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 19:00:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2023-12-02 19:00:41,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2023-12-02 19:00:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 19:00:41,990 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 19:00:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2023-12-02 19:00:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 19:00:41,990 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 19:00:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 19:00:41,990 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 19:00:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:00:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2023-12-02 19:00:41,991 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2023-12-02 19:00:41,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:00:41,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:00:41,991 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_resume [2023-12-02 19:00:41,991 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_resume [2023-12-02 19:00:41,991 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-12-02 19:00:41,991 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-12-02 19:00:42,247 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:00:42,250 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:00:54,289 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:00:55,226 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:00:55,227 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 19:00:55,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:00:55 BoogieIcfgContainer [2023-12-02 19:00:55,229 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:00:55,231 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:00:55,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:00:55,235 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:00:55,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:00:40" (1/3) ... [2023-12-02 19:00:55,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4c3169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:00:55, skipping insertion in model container [2023-12-02 19:00:55,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:00:41" (2/3) ... [2023-12-02 19:00:55,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4c3169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:00:55, skipping insertion in model container [2023-12-02 19:00:55,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:00:55" (3/3) ... [2023-12-02 19:00:55,237 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2023-12-02 19:00:55,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:00:55,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:00:55,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:00:55,321 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;@2910a33d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:00:55,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:00:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 395 states, 269 states have (on average 1.420074349442379) internal successors, (382), 278 states have internal predecessors, (382), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-02 19:00:55,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 19:00:55,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:00:55,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:00:55,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:00:55,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:00:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash 133594370, now seen corresponding path program 1 times [2023-12-02 19:00:55,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:00:55,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11148387] [2023-12-02 19:00:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:00:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:00:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:00:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:00:57,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:00:57,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11148387] [2023-12-02 19:00:57,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11148387] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:00:57,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:00:57,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:00:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760084542] [2023-12-02 19:00:57,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:00:57,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:00:57,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:00:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:00:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:00:57,137 INFO L87 Difference]: Start difference. First operand has 395 states, 269 states have (on average 1.420074349442379) internal successors, (382), 278 states have internal predecessors, (382), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:00:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:00:57,920 INFO L93 Difference]: Finished difference Result 1112 states and 1654 transitions. [2023-12-02 19:00:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:00:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 19:00:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:00:57,943 INFO L225 Difference]: With dead ends: 1112 [2023-12-02 19:00:57,943 INFO L226 Difference]: Without dead ends: 716 [2023-12-02 19:00:57,952 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 19:00:57,955 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 548 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:00:57,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 916 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:00:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-12-02 19:00:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 712. [2023-12-02 19:00:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 485 states have (on average 1.4082474226804125) internal successors, (683), 495 states have internal predecessors, (683), 179 states have call successors, (179), 48 states have call predecessors, (179), 47 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2023-12-02 19:00:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1036 transitions. [2023-12-02 19:00:58,070 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1036 transitions. Word has length 15 [2023-12-02 19:00:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:00:58,070 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 1036 transitions. [2023-12-02 19:00:58,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 19:00:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1036 transitions. [2023-12-02 19:00:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 19:00:58,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:00:58,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:00:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:00:58,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:00:58,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:00:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -248239662, now seen corresponding path program 1 times [2023-12-02 19:00:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:00:58,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900432418] [2023-12-02 19:00:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:00:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:00:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:00:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:00:59,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:00:59,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900432418] [2023-12-02 19:00:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900432418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:00:59,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:00:59,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:00:59,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602369595] [2023-12-02 19:00:59,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:00:59,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:00:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:00:59,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:00:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:00:59,093 INFO L87 Difference]: Start difference. First operand 712 states and 1036 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:00:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:00:59,942 INFO L93 Difference]: Finished difference Result 1755 states and 2535 transitions. [2023-12-02 19:00:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:00:59,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-12-02 19:00:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:00:59,952 INFO L225 Difference]: With dead ends: 1755 [2023-12-02 19:00:59,952 INFO L226 Difference]: Without dead ends: 1044 [2023-12-02 19:00:59,956 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 19:00:59,957 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 503 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:00:59,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 999 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 19:00:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2023-12-02 19:01:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1018. [2023-12-02 19:01:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 697 states have (on average 1.4031563845050214) internal successors, (978), 713 states have internal predecessors, (978), 249 states have call successors, (249), 72 states have call predecessors, (249), 71 states have return successors, (244), 241 states have call predecessors, (244), 244 states have call successors, (244) [2023-12-02 19:01:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1471 transitions. [2023-12-02 19:01:00,024 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1471 transitions. Word has length 26 [2023-12-02 19:01:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:00,025 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1471 transitions. [2023-12-02 19:01:00,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:01:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1471 transitions. [2023-12-02 19:01:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:01:00,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:00,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:01:00,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:01:00,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:00,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:00,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1655749411, now seen corresponding path program 1 times [2023-12-02 19:01:00,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:00,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84948358] [2023-12-02 19:01:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:00,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:00,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:00,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84948358] [2023-12-02 19:01:00,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84948358] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:00,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:00,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:01:00,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572429359] [2023-12-02 19:01:00,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:00,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:01:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:00,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:01:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:01:00,694 INFO L87 Difference]: Start difference. First operand 1018 states and 1471 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:01:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:01,180 INFO L93 Difference]: Finished difference Result 1020 states and 1472 transitions. [2023-12-02 19:01:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:01:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-12-02 19:01:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:01,191 INFO L225 Difference]: With dead ends: 1020 [2023-12-02 19:01:01,191 INFO L226 Difference]: Without dead ends: 1017 [2023-12-02 19:01:01,192 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 19:01:01,194 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 554 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:01,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 491 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:01:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2023-12-02 19:01:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1017. [2023-12-02 19:01:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 697 states have (on average 1.4017216642754662) internal successors, (977), 712 states have internal predecessors, (977), 248 states have call successors, (248), 72 states have call predecessors, (248), 71 states have return successors, (244), 241 states have call predecessors, (244), 244 states have call successors, (244) [2023-12-02 19:01:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1469 transitions. [2023-12-02 19:01:01,283 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1469 transitions. Word has length 27 [2023-12-02 19:01:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:01,284 INFO L495 AbstractCegarLoop]: Abstraction has 1017 states and 1469 transitions. [2023-12-02 19:01:01,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:01:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1469 transitions. [2023-12-02 19:01:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 19:01:01,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:01,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:01:01,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:01:01,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:01,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash 211154558, now seen corresponding path program 1 times [2023-12-02 19:01:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:01,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65998347] [2023-12-02 19:01:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:02,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:02,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65998347] [2023-12-02 19:01:02,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65998347] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:02,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:02,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:01:02,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826024186] [2023-12-02 19:01:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:02,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:01:02,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:02,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:01:02,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:01:02,100 INFO L87 Difference]: Start difference. First operand 1017 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:01:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:02,603 INFO L93 Difference]: Finished difference Result 1019 states and 1470 transitions. [2023-12-02 19:01:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:01:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 19:01:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:02,611 INFO L225 Difference]: With dead ends: 1019 [2023-12-02 19:01:02,611 INFO L226 Difference]: Without dead ends: 1016 [2023-12-02 19:01:02,612 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 19:01:02,614 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 551 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:02,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 489 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:01:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2023-12-02 19:01:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1016. [2023-12-02 19:01:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 697 states have (on average 1.4002869440459111) internal successors, (976), 711 states have internal predecessors, (976), 247 states have call successors, (247), 72 states have call predecessors, (247), 71 states have return successors, (244), 241 states have call predecessors, (244), 244 states have call successors, (244) [2023-12-02 19:01:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1467 transitions. [2023-12-02 19:01:02,688 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1467 transitions. Word has length 28 [2023-12-02 19:01:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:02,688 INFO L495 AbstractCegarLoop]: Abstraction has 1016 states and 1467 transitions. [2023-12-02 19:01:02,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:01:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1467 transitions. [2023-12-02 19:01:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 19:01:02,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:02,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:01:02,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:01:02,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:02,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2044359680, now seen corresponding path program 1 times [2023-12-02 19:01:02,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:02,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224925692] [2023-12-02 19:01:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:01:03,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:03,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224925692] [2023-12-02 19:01:03,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224925692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:03,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:03,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:01:03,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203773973] [2023-12-02 19:01:03,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:03,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:01:03,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:01:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:01:03,409 INFO L87 Difference]: Start difference. First operand 1016 states and 1467 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:01:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:04,099 INFO L93 Difference]: Finished difference Result 2474 states and 3571 transitions. [2023-12-02 19:01:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:01:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 19:01:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:04,113 INFO L225 Difference]: With dead ends: 2474 [2023-12-02 19:01:04,113 INFO L226 Difference]: Without dead ends: 1715 [2023-12-02 19:01:04,117 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 19:01:04,118 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 487 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:04,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 914 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:01:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2023-12-02 19:01:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1712. [2023-12-02 19:01:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1173 states have (on average 1.392156862745098) internal successors, (1633), 1204 states have internal predecessors, (1633), 423 states have call successors, (423), 123 states have call predecessors, (423), 115 states have return successors, (416), 402 states have call predecessors, (416), 416 states have call successors, (416) [2023-12-02 19:01:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2472 transitions. [2023-12-02 19:01:04,273 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2472 transitions. Word has length 29 [2023-12-02 19:01:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:04,273 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 2472 transitions. [2023-12-02 19:01:04,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:01:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2472 transitions. [2023-12-02 19:01:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 19:01:04,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:04,277 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 19:01:04,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:01:04,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:04,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -738425826, now seen corresponding path program 1 times [2023-12-02 19:01:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562264058] [2023-12-02 19:01:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:01:05,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:05,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562264058] [2023-12-02 19:01:05,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562264058] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:05,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:05,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:01:05,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651852713] [2023-12-02 19:01:05,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:05,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:01:05,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:05,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:01:05,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:01:05,713 INFO L87 Difference]: Start difference. First operand 1712 states and 2472 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 19:01:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:06,768 INFO L93 Difference]: Finished difference Result 3710 states and 5338 transitions. [2023-12-02 19:01:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:01:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-12-02 19:01:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:06,783 INFO L225 Difference]: With dead ends: 3710 [2023-12-02 19:01:06,783 INFO L226 Difference]: Without dead ends: 2389 [2023-12-02 19:01:06,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:01:06,789 INFO L413 NwaCegarLoop]: 915 mSDtfsCounter, 864 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:06,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1394 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 19:01:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2023-12-02 19:01:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2217. [2023-12-02 19:01:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 1526 states have (on average 1.3925294888597641) internal successors, (2125), 1563 states have internal predecessors, (2125), 542 states have call successors, (542), 158 states have call predecessors, (542), 148 states have return successors, (535), 519 states have call predecessors, (535), 535 states have call successors, (535) [2023-12-02 19:01:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3202 transitions. [2023-12-02 19:01:06,893 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3202 transitions. Word has length 47 [2023-12-02 19:01:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:06,893 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 3202 transitions. [2023-12-02 19:01:06,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 19:01:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3202 transitions. [2023-12-02 19:01:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 19:01:06,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:06,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 19:01:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:01:06,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:06,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1314020663, now seen corresponding path program 1 times [2023-12-02 19:01:06,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:06,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862608061] [2023-12-02 19:01:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:01:07,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:07,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862608061] [2023-12-02 19:01:07,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862608061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:07,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:07,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:01:07,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723313356] [2023-12-02 19:01:07,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:07,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:01:07,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:01:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:01:07,904 INFO L87 Difference]: Start difference. First operand 2217 states and 3202 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 19:01:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:08,621 INFO L93 Difference]: Finished difference Result 4054 states and 5840 transitions. [2023-12-02 19:01:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:01:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2023-12-02 19:01:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:08,638 INFO L225 Difference]: With dead ends: 4054 [2023-12-02 19:01:08,639 INFO L226 Difference]: Without dead ends: 2226 [2023-12-02 19:01:08,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:01:08,648 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 12 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:08,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1471 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:01:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-12-02 19:01:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2219. [2023-12-02 19:01:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1528 states have (on average 1.3907068062827226) internal successors, (2125), 1565 states have internal predecessors, (2125), 542 states have call successors, (542), 158 states have call predecessors, (542), 148 states have return successors, (535), 519 states have call predecessors, (535), 535 states have call successors, (535) [2023-12-02 19:01:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 3202 transitions. [2023-12-02 19:01:08,796 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 3202 transitions. Word has length 59 [2023-12-02 19:01:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:08,797 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 3202 transitions. [2023-12-02 19:01:08,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 19:01:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 3202 transitions. [2023-12-02 19:01:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 19:01:08,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:08,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 19:01:08,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:01:08,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:08,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:08,801 INFO L85 PathProgramCache]: Analyzing trace with hash 425214889, now seen corresponding path program 1 times [2023-12-02 19:01:08,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:08,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807849712] [2023-12-02 19:01:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:08,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:01:10,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807849712] [2023-12-02 19:01:10,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807849712] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:10,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:10,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:01:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674686576] [2023-12-02 19:01:10,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:10,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:01:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:01:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:01:10,519 INFO L87 Difference]: Start difference. First operand 2219 states and 3202 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 19:01:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:11,783 INFO L93 Difference]: Finished difference Result 4629 states and 6779 transitions. [2023-12-02 19:01:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 19:01:11,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2023-12-02 19:01:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:11,798 INFO L225 Difference]: With dead ends: 4629 [2023-12-02 19:01:11,798 INFO L226 Difference]: Without dead ends: 2801 [2023-12-02 19:01:11,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:01:11,805 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 231 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:11,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 2399 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 19:01:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2023-12-02 19:01:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2231. [2023-12-02 19:01:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 1540 states have (on average 1.388961038961039) internal successors, (2139), 1577 states have internal predecessors, (2139), 542 states have call successors, (542), 158 states have call predecessors, (542), 148 states have return successors, (535), 519 states have call predecessors, (535), 535 states have call successors, (535) [2023-12-02 19:01:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 3216 transitions. [2023-12-02 19:01:11,923 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 3216 transitions. Word has length 63 [2023-12-02 19:01:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:11,924 INFO L495 AbstractCegarLoop]: Abstraction has 2231 states and 3216 transitions. [2023-12-02 19:01:11,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 19:01:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 3216 transitions. [2023-12-02 19:01:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 19:01:11,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:11,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:11,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:01:11,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:11,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1306117587, now seen corresponding path program 1 times [2023-12-02 19:01:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:11,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780264030] [2023-12-02 19:01:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:11,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:01:12,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:12,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780264030] [2023-12-02 19:01:12,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780264030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:12,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:12,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:01:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619871161] [2023-12-02 19:01:12,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:12,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:01:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:01:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:01:12,584 INFO L87 Difference]: Start difference. First operand 2231 states and 3216 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 19:01:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:13,235 INFO L93 Difference]: Finished difference Result 4529 states and 6500 transitions. [2023-12-02 19:01:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:01:13,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 76 [2023-12-02 19:01:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:13,247 INFO L225 Difference]: With dead ends: 4529 [2023-12-02 19:01:13,247 INFO L226 Difference]: Without dead ends: 2299 [2023-12-02 19:01:13,254 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 19:01:13,254 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 180 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:13,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1032 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:01:13,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2023-12-02 19:01:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2026. [2023-12-02 19:01:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 1427 states have (on average 1.4071478626489138) internal successors, (2008), 1459 states have internal predecessors, (2008), 458 states have call successors, (458), 153 states have call predecessors, (458), 140 states have return successors, (448), 431 states have call predecessors, (448), 448 states have call successors, (448) [2023-12-02 19:01:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 2914 transitions. [2023-12-02 19:01:13,352 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 2914 transitions. Word has length 76 [2023-12-02 19:01:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:13,352 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 2914 transitions. [2023-12-02 19:01:13,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 19:01:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 2914 transitions. [2023-12-02 19:01:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 19:01:13,354 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:13,354 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 19:01:13,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:01:13,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:13,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash -814368873, now seen corresponding path program 1 times [2023-12-02 19:01:13,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:13,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468521815] [2023-12-02 19:01:13,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:13,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 19:01:14,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468521815] [2023-12-02 19:01:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468521815] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:14,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:01:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:01:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650678595] [2023-12-02 19:01:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:01:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:01:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:01:14,240 INFO L87 Difference]: Start difference. First operand 2026 states and 2914 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:01:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:15,214 INFO L93 Difference]: Finished difference Result 4778 states and 7008 transitions. [2023-12-02 19:01:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:01:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2023-12-02 19:01:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:15,233 INFO L225 Difference]: With dead ends: 4778 [2023-12-02 19:01:15,233 INFO L226 Difference]: Without dead ends: 2764 [2023-12-02 19:01:15,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:01:15,242 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 185 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:15,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1824 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 19:01:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2023-12-02 19:01:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2034. [2023-12-02 19:01:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1435 states have (on average 1.4048780487804877) internal successors, (2016), 1467 states have internal predecessors, (2016), 458 states have call successors, (458), 153 states have call predecessors, (458), 140 states have return successors, (448), 431 states have call predecessors, (448), 448 states have call successors, (448) [2023-12-02 19:01:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2922 transitions. [2023-12-02 19:01:15,405 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2922 transitions. Word has length 83 [2023-12-02 19:01:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:15,406 INFO L495 AbstractCegarLoop]: Abstraction has 2034 states and 2922 transitions. [2023-12-02 19:01:15,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:01:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2922 transitions. [2023-12-02 19:01:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 19:01:15,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:15,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-12-02 19:01:15,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:01:15,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:15,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1254136342, now seen corresponding path program 1 times [2023-12-02 19:01:15,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:15,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363276939] [2023-12-02 19:01:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:15,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:01:18,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:18,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363276939] [2023-12-02 19:01:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363276939] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:01:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162858859] [2023-12-02 19:01:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:18,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:18,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:18,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:01:18,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:01:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:20,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 13268 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:01:20,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 19:01:20,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:01:20,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162858859] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:01:20,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:01:20,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-12-02 19:01:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237736620] [2023-12-02 19:01:20,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:01:20,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:01:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:01:20,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:01:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:01:20,216 INFO L87 Difference]: Start difference. First operand 2034 states and 2922 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:01:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:01:21,001 INFO L93 Difference]: Finished difference Result 4072 states and 5843 transitions. [2023-12-02 19:01:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:01:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 82 [2023-12-02 19:01:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:01:21,013 INFO L225 Difference]: With dead ends: 4072 [2023-12-02 19:01:21,013 INFO L226 Difference]: Without dead ends: 2032 [2023-12-02 19:01:21,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:01:21,022 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 33 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:01:21,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1933 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 19:01:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2023-12-02 19:01:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1972. [2023-12-02 19:01:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1387 states have (on average 1.4066330209084354) internal successors, (1951), 1419 states have internal predecessors, (1951), 448 states have call successors, (448), 149 states have call predecessors, (448), 136 states have return successors, (438), 421 states have call predecessors, (438), 438 states have call successors, (438) [2023-12-02 19:01:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2837 transitions. [2023-12-02 19:01:21,160 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2837 transitions. Word has length 82 [2023-12-02 19:01:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:01:21,161 INFO L495 AbstractCegarLoop]: Abstraction has 1972 states and 2837 transitions. [2023-12-02 19:01:21,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:01:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2837 transitions. [2023-12-02 19:01:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 19:01:21,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:01:21,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:01:21,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:01:21,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 19:01:21,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:01:21,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:01:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash 34465283, now seen corresponding path program 1 times [2023-12-02 19:01:21,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:01:21,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872175235] [2023-12-02 19:01:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:21,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:01:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 19:01:23,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:01:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872175235] [2023-12-02 19:01:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872175235] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:01:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168833971] [2023-12-02 19:01:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:01:23,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:01:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:01:23,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:01:23,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e83d5a6-8345-40a3-a0df-a9133ee8d426/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:01:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:01:25,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 13358 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 19:01:25,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:01:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 19:01:38,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:01:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 19:01:41,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168833971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:01:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20889938] [2023-12-02 19:01:41,205 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2023-12-02 19:01:41,205 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:01:41,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:01:41,214 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:01:41,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs