./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/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_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/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_3556ddbd-2791-42b5-bbdf-9c3797043b14/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 f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:27:22,729 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:27:22,810 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 08:27:22,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:27:22,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:27:22,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:27:22,844 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:27:22,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:27:22,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:27:22,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:27:22,847 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:27:22,847 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:27:22,848 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:27:22,848 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:27:22,849 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:27:22,850 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:27:22,850 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:27:22,851 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:27:22,852 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:27:22,852 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:27:22,853 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:27:22,853 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:27:22,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:27:22,855 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:27:22,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:27:22,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:27:22,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:27:22,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:27:22,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:27:22,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:27:22,859 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:27:22,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:27:22,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:27:22,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:27:22,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:27:22,861 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:27:22,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:27:22,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:27:22,862 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:27:22,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:27:22,862 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:27:22,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:27:22,863 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:27:22,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:27:22,863 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_3556ddbd-2791-42b5-bbdf-9c3797043b14/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 [2023-12-02 08:27:23,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:27:23,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:27:23,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:27:23,145 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:27:23,145 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:27:23,147 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-12-02 08:27:26,199 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:27:26,559 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:27:26,560 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-12-02 08:27:26,592 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/data/1fcd9ad18/269cc39a34664ff1acda18b7188b67c2/FLAGa692546f5 [2023-12-02 08:27:26,607 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/data/1fcd9ad18/269cc39a34664ff1acda18b7188b67c2 [2023-12-02 08:27:26,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:27:26,611 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:27:26,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:27:26,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:27:26,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:27:26,618 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:27:26" (1/1) ... [2023-12-02 08:27:26,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ff6906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:26, skipping insertion in model container [2023-12-02 08:27:26,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:27:26" (1/1) ... [2023-12-02 08:27:26,705 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:27:27,755 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_3556ddbd-2791-42b5-bbdf-9c3797043b14/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2023-12-02 08:27:27,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:27:27,911 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:27:28,185 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_3556ddbd-2791-42b5-bbdf-9c3797043b14/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2023-12-02 08:27:28,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:27:28,264 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:27:28,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28 WrapperNode [2023-12-02 08:27:28,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:27:28,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:27:28,266 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:27:28,266 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:27:28,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,440 INFO L138 Inliner]: procedures = 167, calls = 938, calls flagged for inlining = 60, calls inlined = 52, statements flattened = 2097 [2023-12-02 08:27:28,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:27:28,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:27:28,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:27:28,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:27:28,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,469 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,572 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,586 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:27:28,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:27:28,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:27:28,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:27:28,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (1/1) ... [2023-12-02 08:27:28,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:27:28,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:28,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:27:28,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:27:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_request [2023-12-02 08:27:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_request [2023-12-02 08:27:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-12-02 08:27:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-12-02 08:27:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-12-02 08:27:28,674 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-12-02 08:27:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_audio_ioctl [2023-12-02 08:27:28,674 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_audio_ioctl [2023-12-02 08:27:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-12-02 08:27:28,675 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-12-02 08:27:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-12-02 08:27:28,675 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-12-02 08:27:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 08:27:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure ps_set_intr [2023-12-02 08:27:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ps_set_intr [2023-12-02 08:27:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_packet [2023-12-02 08:27:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_packet [2023-12-02 08:27:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 08:27:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 08:27:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 08:27:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_status [2023-12-02 08:27:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_status [2023-12-02 08:27:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-12-02 08:27:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-12-02 08:27:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 08:27:28,679 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 08:27:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 08:27:28,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 08:27:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2023-12-02 08:27:28,680 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2023-12-02 08:27:28,680 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_tray_move [2023-12-02 08:27:28,680 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_tray_move [2023-12-02 08:27:28,680 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_read [2023-12-02 08:27:28,681 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_read [2023-12-02 08:27:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 08:27:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 08:27:28,681 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 08:27:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_check_events [2023-12-02 08:27:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_check_events [2023-12-02 08:27:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 08:27:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 08:27:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_lock_door [2023-12-02 08:27:28,683 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_lock_door [2023-12-02 08:27:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 08:27:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2023-12-02 08:27:28,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2023-12-02 08:27:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-02 08:27:28,684 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-02 08:27:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_check_events [2023-12-02 08:27:28,684 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_check_events [2023-12-02 08:27:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-12-02 08:27:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-12-02 08:27:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_sleep [2023-12-02 08:27:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_sleep [2023-12-02 08:27:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_wait [2023-12-02 08:27:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_wait [2023-12-02 08:27:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_atapi [2023-12-02 08:27:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_atapi [2023-12-02 08:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pcd_mutex [2023-12-02 08:27:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pcd_mutex [2023-12-02 08:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_get_mcn [2023-12-02 08:27:28,687 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_get_mcn [2023-12-02 08:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-12-02 08:27:28,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-12-02 08:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 08:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 08:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_identify [2023-12-02 08:27:28,688 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_identify [2023-12-02 08:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure next_request [2023-12-02 08:27:28,688 INFO L138 BoogieDeclarations]: Found implementation of procedure next_request [2023-12-02 08:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 08:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 08:27:28,689 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 08:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_probe [2023-12-02 08:27:28,689 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_probe [2023-12-02 08:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_command [2023-12-02 08:27:28,689 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_command [2023-12-02 08:27:28,690 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_completion [2023-12-02 08:27:28,690 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_completion [2023-12-02 08:27:28,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 08:27:28,690 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_reset [2023-12-02 08:27:28,690 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_reset [2023-12-02 08:27:28,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 08:27:28,691 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-12-02 08:27:28,691 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-12-02 08:27:28,691 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-12-02 08:27:28,691 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-12-02 08:27:28,691 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 08:27:28,692 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 08:27:28,692 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-12-02 08:27:28,692 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-12-02 08:27:28,692 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pcd_mutex [2023-12-02 08:27:28,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pcd_mutex [2023-12-02 08:27:28,692 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2023-12-02 08:27:28,693 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2023-12-02 08:27:28,693 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-12-02 08:27:28,693 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-12-02 08:27:28,693 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2023-12-02 08:27:28,693 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2023-12-02 08:27:28,693 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_reset [2023-12-02 08:27:28,693 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_reset [2023-12-02 08:27:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:27:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_ioctl [2023-12-02 08:27:28,694 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_ioctl [2023-12-02 08:27:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 08:27:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:27:28,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:27:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure pi_do_claimed [2023-12-02 08:27:28,695 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_do_claimed [2023-12-02 08:27:29,120 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:27:29,124 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:27:36,332 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:27:37,213 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:27:37,214 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 08:27:37,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:27:37 BoogieIcfgContainer [2023-12-02 08:27:37,216 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:27:37,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:27:37,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:27:37,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:27:37,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:27:26" (1/3) ... [2023-12-02 08:27:37,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d6fb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:27:37, skipping insertion in model container [2023-12-02 08:27:37,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:28" (2/3) ... [2023-12-02 08:27:37,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d6fb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:27:37, skipping insertion in model container [2023-12-02 08:27:37,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:27:37" (3/3) ... [2023-12-02 08:27:37,226 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-12-02 08:27:37,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:27:37,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 08:27:37,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:27:37,333 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;@7c564926, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:27:37,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 08:27:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 610 states, 391 states have (on average 1.3989769820971867) internal successors, (547), 415 states have internal predecessors, (547), 175 states have call successors, (175), 47 states have call predecessors, (175), 47 states have return successors, (175), 170 states have call predecessors, (175), 175 states have call successors, (175) [2023-12-02 08:27:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 08:27:37,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:37,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:37,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:37,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -180854187, now seen corresponding path program 1 times [2023-12-02 08:27:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932348692] [2023-12-02 08:27:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:37,778 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 08:27:37,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932348692] [2023-12-02 08:27:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932348692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:37,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:27:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786402304] [2023-12-02 08:27:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:27:37,818 INFO L87 Difference]: Start difference. First operand has 610 states, 391 states have (on average 1.3989769820971867) internal successors, (547), 415 states have internal predecessors, (547), 175 states have call successors, (175), 47 states have call predecessors, (175), 47 states have return successors, (175), 170 states have call predecessors, (175), 175 states have call successors, (175) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:27:39,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:27:40,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:27:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:42,523 INFO L93 Difference]: Finished difference Result 1741 states and 2631 transitions. [2023-12-02 08:27:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 08:27:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:42,550 INFO L225 Difference]: With dead ends: 1741 [2023-12-02 08:27:42,550 INFO L226 Difference]: Without dead ends: 1128 [2023-12-02 08:27:42,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:27:42,562 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 773 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:42,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 1503 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-12-02 08:27:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-12-02 08:27:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1114. [2023-12-02 08:27:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 709 states have (on average 1.3921015514809592) internal successors, (987), 741 states have internal predecessors, (987), 318 states have call successors, (318), 87 states have call predecessors, (318), 86 states have return successors, (312), 301 states have call predecessors, (312), 312 states have call successors, (312) [2023-12-02 08:27:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1617 transitions. [2023-12-02 08:27:42,700 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1617 transitions. Word has length 14 [2023-12-02 08:27:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:42,701 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1617 transitions. [2023-12-02 08:27:42,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:27:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1617 transitions. [2023-12-02 08:27:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 08:27:42,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:42,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:42,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:27:42,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:42,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1610620400, now seen corresponding path program 1 times [2023-12-02 08:27:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:42,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108731657] [2023-12-02 08:27:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:42,878 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 08:27:42,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108731657] [2023-12-02 08:27:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108731657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:42,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:27:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972696311] [2023-12-02 08:27:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:42,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:42,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:27:42,883 INFO L87 Difference]: Start difference. First operand 1114 states and 1617 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 08:27:44,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:27:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:47,782 INFO L93 Difference]: Finished difference Result 2820 states and 4069 transitions. [2023-12-02 08:27:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 16 [2023-12-02 08:27:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:47,799 INFO L225 Difference]: With dead ends: 2820 [2023-12-02 08:27:47,799 INFO L226 Difference]: Without dead ends: 1707 [2023-12-02 08:27:47,806 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 08:27:47,807 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 741 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:47,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1387 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-02 08:27:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2023-12-02 08:27:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1693. [2023-12-02 08:27:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1064 states have (on average 1.3740601503759398) internal successors, (1462), 1111 states have internal predecessors, (1462), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-12-02 08:27:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2434 transitions. [2023-12-02 08:27:47,934 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2434 transitions. Word has length 16 [2023-12-02 08:27:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:47,935 INFO L495 AbstractCegarLoop]: Abstraction has 1693 states and 2434 transitions. [2023-12-02 08:27:47,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 08:27:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2434 transitions. [2023-12-02 08:27:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 08:27:47,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:47,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:47,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 08:27:47,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:47,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1302069347, now seen corresponding path program 1 times [2023-12-02 08:27:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:47,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614984459] [2023-12-02 08:27:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:47,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:48,062 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 08:27:48,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:48,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614984459] [2023-12-02 08:27:48,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614984459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:48,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:48,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:27:48,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625743957] [2023-12-02 08:27:48,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:48,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:27:48,065 INFO L87 Difference]: Start difference. First operand 1693 states and 2434 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:27:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:50,153 INFO L93 Difference]: Finished difference Result 3146 states and 4512 transitions. [2023-12-02 08:27:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 08:27:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:50,166 INFO L225 Difference]: With dead ends: 3146 [2023-12-02 08:27:50,167 INFO L226 Difference]: Without dead ends: 1693 [2023-12-02 08:27:50,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:27:50,175 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 848 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:50,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 751 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 08:27:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2023-12-02 08:27:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1693. [2023-12-02 08:27:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1064 states have (on average 1.3721804511278195) internal successors, (1460), 1111 states have internal predecessors, (1460), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-12-02 08:27:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2432 transitions. [2023-12-02 08:27:50,289 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2432 transitions. Word has length 15 [2023-12-02 08:27:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:50,289 INFO L495 AbstractCegarLoop]: Abstraction has 1693 states and 2432 transitions. [2023-12-02 08:27:50,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:27:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2432 transitions. [2023-12-02 08:27:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 08:27:50,292 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:50,292 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] [2023-12-02 08:27:50,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 08:27:50,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1876642621, now seen corresponding path program 1 times [2023-12-02 08:27:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275155930] [2023-12-02 08:27:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:50,411 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 08:27:50,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275155930] [2023-12-02 08:27:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275155930] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:50,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:50,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:27:50,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678567155] [2023-12-02 08:27:50,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:50,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:27:50,414 INFO L87 Difference]: Start difference. First operand 1693 states and 2432 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 08:27:51,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:27:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:55,288 INFO L93 Difference]: Finished difference Result 3160 states and 4530 transitions. [2023-12-02 08:27:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:27:55,288 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), 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 25 [2023-12-02 08:27:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:55,306 INFO L225 Difference]: With dead ends: 3160 [2023-12-02 08:27:55,307 INFO L226 Difference]: Without dead ends: 1707 [2023-12-02 08:27:55,316 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 08:27:55,317 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 9 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:55,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1499 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 08:27:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2023-12-02 08:27:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1695. [2023-12-02 08:27:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1066 states have (on average 1.3714821763602252) internal successors, (1462), 1113 states have internal predecessors, (1462), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-12-02 08:27:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2434 transitions. [2023-12-02 08:27:55,453 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2434 transitions. Word has length 25 [2023-12-02 08:27:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:55,453 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 2434 transitions. [2023-12-02 08:27:55,454 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), 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 08:27:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2434 transitions. [2023-12-02 08:27:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 08:27:55,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:55,457 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 08:27:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 08:27:55,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:55,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash 878094757, now seen corresponding path program 1 times [2023-12-02 08:27:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:55,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254604799] [2023-12-02 08:27:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:55,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:27:55,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:55,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254604799] [2023-12-02 08:27:55,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254604799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:55,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426366195] [2023-12-02 08:27:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:55,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:55,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:55,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:55,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:27:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:56,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:27:56,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:27:56,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:27:56,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426366195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:56,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:56,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 08:27:56,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261142068] [2023-12-02 08:27:56,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:56,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:27:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:56,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:27:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:27:56,310 INFO L87 Difference]: Start difference. First operand 1695 states and 2434 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 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 08:27:58,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:28:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:00,328 INFO L93 Difference]: Finished difference Result 3178 states and 4558 transitions. [2023-12-02 08:28:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:28:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 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 28 [2023-12-02 08:28:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:00,346 INFO L225 Difference]: With dead ends: 3178 [2023-12-02 08:28:00,347 INFO L226 Difference]: Without dead ends: 1723 [2023-12-02 08:28:00,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:00,357 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 11 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:00,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1496 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-02 08:28:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-12-02 08:28:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1699. [2023-12-02 08:28:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1070 states have (on average 1.3700934579439252) internal successors, (1466), 1117 states have internal predecessors, (1466), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-12-02 08:28:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2438 transitions. [2023-12-02 08:28:00,479 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2438 transitions. Word has length 28 [2023-12-02 08:28:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:00,479 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2438 transitions. [2023-12-02 08:28:00,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 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 08:28:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2438 transitions. [2023-12-02 08:28:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 08:28:00,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:00,483 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, 1, 1, 1] [2023-12-02 08:28:00,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 08:28:00,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:00,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:00,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash -712639267, now seen corresponding path program 1 times [2023-12-02 08:28:00,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:00,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356079200] [2023-12-02 08:28:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:28:00,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:00,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356079200] [2023-12-02 08:28:00,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356079200] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970601482] [2023-12-02 08:28:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:00,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:00,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:00,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:00,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:28:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:01,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:28:01,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:28:01,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:28:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970601482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:28:01,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:28:01,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 08:28:01,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495407503] [2023-12-02 08:28:01,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:28:01,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:28:01,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:28:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:01,508 INFO L87 Difference]: Start difference. First operand 1699 states and 2438 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 08:28:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:05,336 INFO L93 Difference]: Finished difference Result 3184 states and 4562 transitions. [2023-12-02 08:28:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:28:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 32 [2023-12-02 08:28:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:05,347 INFO L225 Difference]: With dead ends: 3184 [2023-12-02 08:28:05,347 INFO L226 Difference]: Without dead ends: 1725 [2023-12-02 08:28:05,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:05,354 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 21 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:05,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1482 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-02 08:28:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2023-12-02 08:28:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1723. [2023-12-02 08:28:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1088 states have (on average 1.3713235294117647) internal successors, (1492), 1135 states have internal predecessors, (1492), 495 states have call successors, (495), 140 states have call predecessors, (495), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-12-02 08:28:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2476 transitions. [2023-12-02 08:28:05,422 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2476 transitions. Word has length 32 [2023-12-02 08:28:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:05,422 INFO L495 AbstractCegarLoop]: Abstraction has 1723 states and 2476 transitions. [2023-12-02 08:28:05,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 08:28:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2476 transitions. [2023-12-02 08:28:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 08:28:05,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:05,425 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:28:05,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:28:05,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 08:28:05,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:05,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:05,627 INFO L85 PathProgramCache]: Analyzing trace with hash -731232067, now seen corresponding path program 1 times [2023-12-02 08:28:05,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:05,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224663550] [2023-12-02 08:28:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:05,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:28:05,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224663550] [2023-12-02 08:28:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224663550] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233373074] [2023-12-02 08:28:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:05,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:05,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:05,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:05,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:28:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:06,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:28:06,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:28:06,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:28:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233373074] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:28:06,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:28:06,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-02 08:28:06,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862958282] [2023-12-02 08:28:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:28:06,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:28:06,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:06,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:28:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:06,408 INFO L87 Difference]: Start difference. First operand 1723 states and 2476 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:08,742 INFO L93 Difference]: Finished difference Result 1725 states and 2477 transitions. [2023-12-02 08:28:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:28:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-12-02 08:28:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:08,753 INFO L225 Difference]: With dead ends: 1725 [2023-12-02 08:28:08,753 INFO L226 Difference]: Without dead ends: 1722 [2023-12-02 08:28:08,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:08,755 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 816 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:08,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 749 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 08:28:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2023-12-02 08:28:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1722. [2023-12-02 08:28:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1088 states have (on average 1.3704044117647058) internal successors, (1491), 1134 states have internal predecessors, (1491), 494 states have call successors, (494), 140 states have call predecessors, (494), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-12-02 08:28:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2474 transitions. [2023-12-02 08:28:08,889 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2474 transitions. Word has length 42 [2023-12-02 08:28:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:08,890 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 2474 transitions. [2023-12-02 08:28:08,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:08,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2474 transitions. [2023-12-02 08:28:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 08:28:08,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:08,894 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 08:28:08,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:28:09,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 08:28:09,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:09,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:09,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1193730688, now seen corresponding path program 1 times [2023-12-02 08:28:09,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:09,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464094308] [2023-12-02 08:28:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:09,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:28:09,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464094308] [2023-12-02 08:28:09,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464094308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389849078] [2023-12-02 08:28:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:09,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:09,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:09,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:09,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:28:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:09,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:28:09,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:28:09,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:28:09,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389849078] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:28:09,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:28:09,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-02 08:28:09,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400420832] [2023-12-02 08:28:09,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:28:09,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:28:09,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:09,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:28:09,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:09,906 INFO L87 Difference]: Start difference. First operand 1722 states and 2474 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:11,629 INFO L93 Difference]: Finished difference Result 1724 states and 2475 transitions. [2023-12-02 08:28:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:28:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-12-02 08:28:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:11,643 INFO L225 Difference]: With dead ends: 1724 [2023-12-02 08:28:11,644 INFO L226 Difference]: Without dead ends: 1721 [2023-12-02 08:28:11,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:11,646 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 813 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:11,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 747 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 08:28:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-12-02 08:28:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1721. [2023-12-02 08:28:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1088 states have (on average 1.369485294117647) internal successors, (1490), 1133 states have internal predecessors, (1490), 493 states have call successors, (493), 140 states have call predecessors, (493), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-12-02 08:28:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2472 transitions. [2023-12-02 08:28:11,760 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2472 transitions. Word has length 43 [2023-12-02 08:28:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:11,761 INFO L495 AbstractCegarLoop]: Abstraction has 1721 states and 2472 transitions. [2023-12-02 08:28:11,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2472 transitions. [2023-12-02 08:28:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 08:28:11,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:11,764 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 08:28:11,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 08:28:11,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 08:28:11,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:11,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1648686112, now seen corresponding path program 1 times [2023-12-02 08:28:11,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:11,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15382178] [2023-12-02 08:28:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:11,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:28:12,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15382178] [2023-12-02 08:28:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15382178] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106232252] [2023-12-02 08:28:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:12,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:12,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:12,140 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:12,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 08:28:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:12,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:28:12,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:28:12,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:28:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106232252] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:28:12,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:28:12,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-02 08:28:12,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175506932] [2023-12-02 08:28:12,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:28:12,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:28:12,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:28:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:12,682 INFO L87 Difference]: Start difference. First operand 1721 states and 2472 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:14,833 INFO L93 Difference]: Finished difference Result 1723 states and 2473 transitions. [2023-12-02 08:28:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:28:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2023-12-02 08:28:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:14,841 INFO L225 Difference]: With dead ends: 1723 [2023-12-02 08:28:14,842 INFO L226 Difference]: Without dead ends: 1720 [2023-12-02 08:28:14,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:14,843 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 810 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:14,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 745 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 08:28:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2023-12-02 08:28:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1720. [2023-12-02 08:28:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1088 states have (on average 1.3685661764705883) internal successors, (1489), 1132 states have internal predecessors, (1489), 492 states have call successors, (492), 140 states have call predecessors, (492), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-12-02 08:28:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2470 transitions. [2023-12-02 08:28:14,956 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2470 transitions. Word has length 44 [2023-12-02 08:28:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:14,956 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 2470 transitions. [2023-12-02 08:28:14,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2470 transitions. [2023-12-02 08:28:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 08:28:14,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:14,959 INFO L195 NwaCegarLoop]: trace histogram [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 08:28:14,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 08:28:15,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:15,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:15,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash -430701437, now seen corresponding path program 1 times [2023-12-02 08:28:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:15,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874516536] [2023-12-02 08:28:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:28:15,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874516536] [2023-12-02 08:28:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874516536] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:15,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820780644] [2023-12-02 08:28:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:15,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:15,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:15,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:15,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 08:28:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:15,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:28:15,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:28:15,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:28:15,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820780644] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:28:15,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:28:15,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-02 08:28:15,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64780608] [2023-12-02 08:28:15,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:28:15,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:28:15,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:15,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:28:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:15,921 INFO L87 Difference]: Start difference. First operand 1720 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:17,629 INFO L93 Difference]: Finished difference Result 1722 states and 2471 transitions. [2023-12-02 08:28:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:28:17,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2023-12-02 08:28:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:17,637 INFO L225 Difference]: With dead ends: 1722 [2023-12-02 08:28:17,637 INFO L226 Difference]: Without dead ends: 1698 [2023-12-02 08:28:17,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:28:17,638 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 782 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:17,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 756 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 08:28:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2023-12-02 08:28:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1698. [2023-12-02 08:28:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1074 states have (on average 1.367783985102421) internal successors, (1469), 1116 states have internal predecessors, (1469), 487 states have call successors, (487), 137 states have call predecessors, (487), 136 states have return successors, (486), 471 states have call predecessors, (486), 486 states have call successors, (486) [2023-12-02 08:28:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2442 transitions. [2023-12-02 08:28:17,768 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2442 transitions. Word has length 45 [2023-12-02 08:28:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:17,768 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2442 transitions. [2023-12-02 08:28:17,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 08:28:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2442 transitions. [2023-12-02 08:28:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 08:28:17,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:17,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:28:17,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 08:28:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:17,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:28:17,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:17,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1500963667, now seen corresponding path program 1 times [2023-12-02 08:28:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:17,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11488642] [2023-12-02 08:28:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:28:18,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11488642] [2023-12-02 08:28:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11488642] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493441818] [2023-12-02 08:28:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:18,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:18,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:18,132 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:18,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3556ddbd-2791-42b5-bbdf-9c3797043b14/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 08:28:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:18,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:28:18,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:28:18,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:28:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:28:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493441818] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:28:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872776525] [2023-12-02 08:28:18,715 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 08:28:18,716 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:28:18,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:28:18,727 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:28:18,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:30:41,197 INFO L197 IcfgInterpreter]: Interpreting procedure printk with input of size 255 for LOIs [2023-12-02 08:30:41,959 INFO L197 IcfgInterpreter]: Interpreting procedure put_disk with input of size 212 for LOIs [2023-12-02 08:30:42,047 INFO L197 IcfgInterpreter]: Interpreting procedure pi_init with input of size 273 for LOIs [2023-12-02 08:30:42,235 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:30:53,833 WARN L293 SmtUtils]: Spent 11.51s on a formula simplification that was a NOOP. DAG size: 1235 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:31:06,255 WARN L293 SmtUtils]: Spent 12.29s on a formula simplification that was a NOOP. DAG size: 1248 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:31:18,737 WARN L293 SmtUtils]: Spent 12.31s on a formula simplification that was a NOOP. DAG size: 1250 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:31:30,876 WARN L293 SmtUtils]: Spent 11.93s on a formula simplification that was a NOOP. DAG size: 1238 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:31:43,478 WARN L293 SmtUtils]: Spent 12.33s on a formula simplification that was a NOOP. DAG size: 1251 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:31:56,262 WARN L293 SmtUtils]: Spent 12.47s on a formula simplification that was a NOOP. DAG size: 1253 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:32:08,359 WARN L293 SmtUtils]: Spent 11.80s on a formula simplification that was a NOOP. DAG size: 1241 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:32:57,660 WARN L293 SmtUtils]: Spent 11.58s on a formula simplification that was a NOOP. DAG size: 1252 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:33:10,331 WARN L293 SmtUtils]: Spent 11.88s on a formula simplification that was a NOOP. DAG size: 1254 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:33:22,380 WARN L293 SmtUtils]: Spent 11.26s on a formula simplification that was a NOOP. DAG size: 1238 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:33:22,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [872776525] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:33:22,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:33:22,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [4, 4, 4] total 41 [2023-12-02 08:33:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623209327] [2023-12-02 08:33:22,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:33:22,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 08:33:22,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:33:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 08:33:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 08:33:22,388 INFO L87 Difference]: Start difference. First operand 1698 states and 2442 transitions. Second operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 08:33:41,267 WARN L293 SmtUtils]: Spent 11.55s on a formula simplification that was a NOOP. DAG size: 1247 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:33:53,339 WARN L293 SmtUtils]: Spent 11.18s on a formula simplification that was a NOOP. DAG size: 1251 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:34:10,862 WARN L293 SmtUtils]: Spent 11.83s on a formula simplification that was a NOOP. DAG size: 1254 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:34:30,782 WARN L293 SmtUtils]: Spent 15.13s on a formula simplification that was a NOOP. DAG size: 1261 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:34:59,755 WARN L293 SmtUtils]: Spent 27.66s on a formula simplification that was a NOOP. DAG size: 1266 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:35:28,762 WARN L293 SmtUtils]: Spent 27.31s on a formula simplification that was a NOOP. DAG size: 1276 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:35:44,934 WARN L293 SmtUtils]: Spent 14.45s on a formula simplification that was a NOOP. DAG size: 1267 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:35:59,970 WARN L293 SmtUtils]: Spent 13.88s on a formula simplification that was a NOOP. DAG size: 1259 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:36:16,098 WARN L293 SmtUtils]: Spent 15.16s on a formula simplification that was a NOOP. DAG size: 1278 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:36:32,587 WARN L293 SmtUtils]: Spent 15.18s on a formula simplification that was a NOOP. DAG size: 1288 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:36:50,540 WARN L293 SmtUtils]: Spent 16.68s on a formula simplification that was a NOOP. DAG size: 1327 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:37:07,634 WARN L293 SmtUtils]: Spent 15.82s on a formula simplification that was a NOOP. DAG size: 1284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:37:24,111 WARN L293 SmtUtils]: Spent 15.30s on a formula simplification that was a NOOP. DAG size: 1269 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:37:41,112 WARN L293 SmtUtils]: Spent 15.44s on a formula simplification that was a NOOP. DAG size: 1265 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:37:59,418 WARN L293 SmtUtils]: Spent 16.44s on a formula simplification that was a NOOP. DAG size: 1269 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:38:20,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:24,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:26,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:28,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:38:30,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:32,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:34,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:36,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:38,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:40,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:38:42,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:44,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:46,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:48,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:51,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:53,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:38:55,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:38:57,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:38:59,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:01,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:03,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:04,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:39:06,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:09,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:11,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:15,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:18,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:39:19,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:20,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:21,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:39:23,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 08:39:25,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 08:40:19,965 WARN L293 SmtUtils]: Spent 17.54s on a formula simplification that was a NOOP. DAG size: 1275 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:40:38,436 WARN L293 SmtUtils]: Spent 17.25s on a formula simplification. DAG size of input: 1277 DAG size of output: 1267 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:40:52,966 WARN L293 SmtUtils]: Spent 12.47s on a formula simplification that was a NOOP. DAG size: 1241 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:41:15,972 WARN L293 SmtUtils]: Spent 21.24s on a formula simplification. DAG size of input: 1277 DAG size of output: 1273 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 08:41:34,636 WARN L293 SmtUtils]: Spent 17.38s on a formula simplification that was a NOOP. DAG size: 1262 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)