./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/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_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/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_4dabbb53-ee06-4c07-b47f-d4814de9dc13/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 32c3d0de0693c88d7932ff8b6e02d1235a8aa90cfbd4ebc203b8adf917998be1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:14:47,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:14:48,040 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:14:48,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:14:48,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:14:48,071 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:14:48,072 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:14:48,073 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:14:48,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:14:48,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:14:48,075 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:14:48,076 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:14:48,076 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:14:48,077 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:14:48,078 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:14:48,078 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:14:48,079 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:14:48,079 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:14:48,080 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:14:48,081 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:14:48,081 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:14:48,082 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:14:48,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:14:48,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:14:48,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:14:48,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:14:48,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:14:48,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:14:48,086 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:14:48,086 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:14:48,087 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:14:48,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:14:48,088 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:14:48,088 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:14:48,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:14:48,089 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:14:48,089 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:14:48,089 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:14:48,089 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:14:48,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:14:48,090 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:14:48,090 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:14:48,090 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:14:48,091 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:14:48,091 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_4dabbb53-ee06-4c07-b47f-d4814de9dc13/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32c3d0de0693c88d7932ff8b6e02d1235a8aa90cfbd4ebc203b8adf917998be1 [2023-12-02 17:14:48,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:14:48,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:14:48,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:14:48,354 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:14:48,355 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:14:48,356 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2023-12-02 17:14:51,207 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:14:51,587 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:14:51,588 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2023-12-02 17:14:51,619 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/data/a9cc7431f/d8f3724608d44c1aa1f0fa4bd3a21d89/FLAG916c9a318 [2023-12-02 17:14:51,634 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/data/a9cc7431f/d8f3724608d44c1aa1f0fa4bd3a21d89 [2023-12-02 17:14:51,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:14:51,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:14:51,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:14:51,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:14:51,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:14:51,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:14:51" (1/1) ... [2023-12-02 17:14:51,647 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8fec24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:51, skipping insertion in model container [2023-12-02 17:14:51,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:14:51" (1/1) ... [2023-12-02 17:14:51,738 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:14:52,611 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_4dabbb53-ee06-4c07-b47f-d4814de9dc13/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i[192198,192211] [2023-12-02 17:14:52,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:14:52,778 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:14:52,835 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [2571] [2023-12-02 17:14:52,837 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [2579] [2023-12-02 17:14:52,977 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_4dabbb53-ee06-4c07-b47f-d4814de9dc13/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i[192198,192211] [2023-12-02 17:14:52,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:14:53,155 WARN L675 CHandler]: The function strcspn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:14:53,155 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:14:53,163 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:14:53,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53 WrapperNode [2023-12-02 17:14:53,164 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:14:53,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:14:53,165 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:14:53,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:14:53,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,479 INFO L138 Inliner]: procedures = 165, calls = 5886, calls flagged for inlining = 57, calls inlined = 52, statements flattened = 7117 [2023-12-02 17:14:53,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:14:53,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:14:53,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:14:53,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:14:53,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,530 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,659 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,678 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,693 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:14:53,735 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:14:53,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:14:53,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:14:53,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (1/1) ... [2023-12-02 17:14:53,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:14:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:53,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:14:53,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:14:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_while_busy [2023-12-02 17:14:53,807 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_while_busy [2023-12-02 17:14:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-12-02 17:14:53,809 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-12-02 17:14:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_for_read [2023-12-02 17:14:53,810 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_for_read [2023-12-02 17:14:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-12-02 17:14:53,810 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-12-02 17:14:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2023-12-02 17:14:53,810 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2023-12-02 17:14:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_remove [2023-12-02 17:14:53,810 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_remove [2023-12-02 17:14:53,811 INFO L130 BoogieDeclarations]: Found specification of procedure dmi_get_system_info [2023-12-02 17:14:53,811 INFO L138 BoogieDeclarations]: Found implementation of procedure dmi_get_system_info [2023-12-02 17:14:53,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 17:14:53,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 17:14:53,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:14:53,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 17:14:53,812 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 17:14:53,812 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read [2023-12-02 17:14:53,812 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read [2023-12-02 17:14:53,813 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 17:14:53,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 17:14:53,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:14:53,814 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 17:14:53,818 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 17:14:53,818 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 17:14:53,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 17:14:53,818 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_probe [2023-12-02 17:14:53,819 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_probe [2023-12-02 17:14:53,819 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-12-02 17:14:53,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-12-02 17:14:53,819 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2023-12-02 17:14:53,819 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2023-12-02 17:14:53,819 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2023-12-02 17:14:53,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2023-12-02 17:14:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 17:14:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 17:14:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_suspend [2023-12-02 17:14:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_suspend [2023-12-02 17:14:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 17:14:53,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 17:14:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:14:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:14:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read_increment_offset [2023-12-02 17:14:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read_increment_offset [2023-12-02 17:14:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:14:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2023-12-02 17:14:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2023-12-02 17:14:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-02 17:14:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-02 17:14:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:14:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:14:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:14:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_update_device [2023-12-02 17:14:53,822 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_update_device [2023-12-02 17:14:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:14:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-12-02 17:14:53,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-12-02 17:14:53,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:14:53,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:14:53,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2023-12-02 17:14:53,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2023-12-02 17:14:53,823 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 17:14:53,823 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 17:14:53,824 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2023-12-02 17:14:53,824 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 17:14:53,824 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 17:14:53,824 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 17:14:53,824 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 17:14:53,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:14:53,824 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2023-12-02 17:14:53,824 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2023-12-02 17:14:53,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:14:53,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:14:53,825 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_resume [2023-12-02 17:14:53,825 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_resume [2023-12-02 17:14:53,825 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-12-02 17:14:53,825 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-12-02 17:14:54,098 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:14:54,101 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:14:56,616 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 17:15:07,203 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:15:07,794 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:15:07,794 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:15:07,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:15:07 BoogieIcfgContainer [2023-12-02 17:15:07,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:15:07,799 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:15:07,799 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:15:07,801 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:15:07,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:14:51" (1/3) ... [2023-12-02 17:15:07,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f19067f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:15:07, skipping insertion in model container [2023-12-02 17:15:07,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:53" (2/3) ... [2023-12-02 17:15:07,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f19067f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:15:07, skipping insertion in model container [2023-12-02 17:15:07,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:15:07" (3/3) ... [2023-12-02 17:15:07,804 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2023-12-02 17:15:07,820 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:15:07,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:15:07,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:15:07,881 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;@62ab884, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:15:07,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:15:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 487 states, 331 states have (on average 1.4380664652567976) internal successors, (476), 344 states have internal predecessors, (476), 122 states have call successors, (122), 33 states have call predecessors, (122), 32 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2023-12-02 17:15:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 17:15:07,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:07,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:07,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:07,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1222240717, now seen corresponding path program 1 times [2023-12-02 17:15:07,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:07,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230286970] [2023-12-02 17:15:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:09,682 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 17:15:09,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230286970] [2023-12-02 17:15:09,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230286970] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:09,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:09,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:15:09,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543944161] [2023-12-02 17:15:09,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:09,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:09,725 INFO L87 Difference]: Start difference. First operand has 487 states, 331 states have (on average 1.4380664652567976) internal successors, (476), 344 states have internal predecessors, (476), 122 states have call successors, (122), 33 states have call predecessors, (122), 32 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:15:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:10,467 INFO L93 Difference]: Finished difference Result 1380 states and 2051 transitions. [2023-12-02 17:15:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 17:15:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:10,492 INFO L225 Difference]: With dead ends: 1380 [2023-12-02 17:15:10,492 INFO L226 Difference]: Without dead ends: 882 [2023-12-02 17:15:10,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:10,505 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 682 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:10,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1167 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:15:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-12-02 17:15:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 878. [2023-12-02 17:15:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 602 states have (on average 1.4186046511627908) internal successors, (854), 612 states have internal predecessors, (854), 214 states have call successors, (214), 62 states have call predecessors, (214), 61 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2023-12-02 17:15:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1277 transitions. [2023-12-02 17:15:10,637 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1277 transitions. Word has length 15 [2023-12-02 17:15:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:10,637 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1277 transitions. [2023-12-02 17:15:10,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:15:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1277 transitions. [2023-12-02 17:15:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 17:15:10,641 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:10,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:10,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:15:10,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:10,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash -646271744, now seen corresponding path program 1 times [2023-12-02 17:15:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829964504] [2023-12-02 17:15:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:11,470 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 17:15:11,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829964504] [2023-12-02 17:15:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829964504] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:11,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:11,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:15:11,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938757279] [2023-12-02 17:15:11,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:11,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:11,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:11,475 INFO L87 Difference]: Start difference. First operand 878 states and 1277 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:15:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:12,150 INFO L93 Difference]: Finished difference Result 2514 states and 3638 transitions. [2023-12-02 17:15:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 17:15:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:12,166 INFO L225 Difference]: With dead ends: 2514 [2023-12-02 17:15:12,166 INFO L226 Difference]: Without dead ends: 1637 [2023-12-02 17:15:12,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:12,173 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 599 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:12,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 1240 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:15:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-12-02 17:15:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1622. [2023-12-02 17:15:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1111 states have (on average 1.4032403240324032) internal successors, (1559), 1127 states have internal predecessors, (1559), 395 states have call successors, (395), 116 states have call predecessors, (395), 115 states have return successors, (390), 390 states have call predecessors, (390), 390 states have call successors, (390) [2023-12-02 17:15:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2344 transitions. [2023-12-02 17:15:12,281 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2344 transitions. Word has length 19 [2023-12-02 17:15:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:12,282 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2344 transitions. [2023-12-02 17:15:12,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:15:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2344 transitions. [2023-12-02 17:15:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 17:15:12,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:12,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:15:12,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:12,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash 834766742, now seen corresponding path program 1 times [2023-12-02 17:15:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:12,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297942232] [2023-12-02 17:15:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:13,189 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 17:15:13,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297942232] [2023-12-02 17:15:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297942232] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:13,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:13,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:15:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184517077] [2023-12-02 17:15:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:13,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:13,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:13,192 INFO L87 Difference]: Start difference. First operand 1622 states and 2344 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:15:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:13,630 INFO L93 Difference]: Finished difference Result 1624 states and 2345 transitions. [2023-12-02 17:15:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:13,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-12-02 17:15:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:13,645 INFO L225 Difference]: With dead ends: 1624 [2023-12-02 17:15:13,645 INFO L226 Difference]: Without dead ends: 1621 [2023-12-02 17:15:13,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:13,648 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 681 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:13,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 617 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:15:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2023-12-02 17:15:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1621. [2023-12-02 17:15:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1111 states have (on average 1.4023402340234024) internal successors, (1558), 1126 states have internal predecessors, (1558), 394 states have call successors, (394), 116 states have call predecessors, (394), 115 states have return successors, (390), 390 states have call predecessors, (390), 390 states have call successors, (390) [2023-12-02 17:15:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2342 transitions. [2023-12-02 17:15:13,752 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2342 transitions. Word has length 27 [2023-12-02 17:15:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:13,752 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2342 transitions. [2023-12-02 17:15:13,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:15:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2342 transitions. [2023-12-02 17:15:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:15:13,755 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:13,755 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 17:15:13,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:15:13,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:13,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash 107857051, now seen corresponding path program 1 times [2023-12-02 17:15:13,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:13,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984300546] [2023-12-02 17:15:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:13,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:14,606 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 17:15:14,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:14,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984300546] [2023-12-02 17:15:14,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984300546] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:14,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:14,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:15:14,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38575151] [2023-12-02 17:15:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:14,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:14,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:14,609 INFO L87 Difference]: Start difference. First operand 1621 states and 2342 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:15:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:15,049 INFO L93 Difference]: Finished difference Result 1623 states and 2343 transitions. [2023-12-02 17:15:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 17:15:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:15,063 INFO L225 Difference]: With dead ends: 1623 [2023-12-02 17:15:15,063 INFO L226 Difference]: Without dead ends: 1620 [2023-12-02 17:15:15,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:15,066 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 678 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:15,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 615 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:15:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2023-12-02 17:15:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1620. [2023-12-02 17:15:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1111 states have (on average 1.4014401440144015) internal successors, (1557), 1125 states have internal predecessors, (1557), 393 states have call successors, (393), 116 states have call predecessors, (393), 115 states have return successors, (390), 390 states have call predecessors, (390), 390 states have call successors, (390) [2023-12-02 17:15:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2340 transitions. [2023-12-02 17:15:15,185 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2340 transitions. Word has length 28 [2023-12-02 17:15:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:15,185 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 2340 transitions. [2023-12-02 17:15:15,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:15:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2340 transitions. [2023-12-02 17:15:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 17:15:15,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:15,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:15,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:15:15,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:15,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash -951502023, now seen corresponding path program 1 times [2023-12-02 17:15:15,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199970096] [2023-12-02 17:15:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:16,204 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 17:15:16,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:16,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199970096] [2023-12-02 17:15:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199970096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:16,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:15:16,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460101486] [2023-12-02 17:15:16,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:16,207 INFO L87 Difference]: Start difference. First operand 1620 states and 2340 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:15:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:16,938 INFO L93 Difference]: Finished difference Result 4516 states and 6544 transitions. [2023-12-02 17:15:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:16,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 17:15:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:16,958 INFO L225 Difference]: With dead ends: 4516 [2023-12-02 17:15:16,959 INFO L226 Difference]: Without dead ends: 2889 [2023-12-02 17:15:16,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:16,968 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 615 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:16,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1167 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:15:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2023-12-02 17:15:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2882. [2023-12-02 17:15:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 1977 states have (on average 1.396560445118867) internal successors, (2761), 2014 states have internal predecessors, (2761), 709 states have call successors, (709), 209 states have call predecessors, (709), 195 states have return successors, (703), 682 states have call predecessors, (703), 699 states have call successors, (703) [2023-12-02 17:15:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 4173 transitions. [2023-12-02 17:15:17,137 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 4173 transitions. Word has length 29 [2023-12-02 17:15:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:17,138 INFO L495 AbstractCegarLoop]: Abstraction has 2882 states and 4173 transitions. [2023-12-02 17:15:17,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:15:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 4173 transitions. [2023-12-02 17:15:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 17:15:17,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:17,141 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:15:17,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:15:17,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:17,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1759042422, now seen corresponding path program 1 times [2023-12-02 17:15:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:17,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185976271] [2023-12-02 17:15:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:18,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:18,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185976271] [2023-12-02 17:15:18,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185976271] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:18,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:18,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:15:18,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997447071] [2023-12-02 17:15:18,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:18,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:15:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:18,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:15:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:15:18,829 INFO L87 Difference]: Start difference. First operand 2882 states and 4173 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:15:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:19,906 INFO L93 Difference]: Finished difference Result 6659 states and 9586 transitions. [2023-12-02 17:15:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:15:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-12-02 17:15:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:19,936 INFO L225 Difference]: With dead ends: 6659 [2023-12-02 17:15:19,936 INFO L226 Difference]: Without dead ends: 3772 [2023-12-02 17:15:19,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:15:19,952 INFO L413 NwaCegarLoop]: 1219 mSDtfsCounter, 691 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:19,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 3040 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:15:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2023-12-02 17:15:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3706. [2023-12-02 17:15:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2525 states have (on average 1.3889108910891088) internal successors, (3507), 2580 states have internal predecessors, (3507), 916 states have call successors, (916), 278 states have call predecessors, (916), 264 states have return successors, (910), 877 states have call predecessors, (910), 906 states have call successors, (910) [2023-12-02 17:15:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5333 transitions. [2023-12-02 17:15:20,219 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5333 transitions. Word has length 55 [2023-12-02 17:15:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:20,219 INFO L495 AbstractCegarLoop]: Abstraction has 3706 states and 5333 transitions. [2023-12-02 17:15:20,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:15:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5333 transitions. [2023-12-02 17:15:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:15:20,222 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:20,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:20,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:15:20,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:20,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1647008018, now seen corresponding path program 1 times [2023-12-02 17:15:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:20,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838100722] [2023-12-02 17:15:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:20,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:21,098 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 17:15:21,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838100722] [2023-12-02 17:15:21,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838100722] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:21,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:21,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:15:21,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751965976] [2023-12-02 17:15:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:21,102 INFO L87 Difference]: Start difference. First operand 3706 states and 5333 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 17:15:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:21,899 INFO L93 Difference]: Finished difference Result 7923 states and 11302 transitions. [2023-12-02 17:15:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:21,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2023-12-02 17:15:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:21,929 INFO L225 Difference]: With dead ends: 7923 [2023-12-02 17:15:21,929 INFO L226 Difference]: Without dead ends: 4218 [2023-12-02 17:15:21,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:21,947 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 240 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:21,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1309 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:15:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2023-12-02 17:15:22,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 4183. [2023-12-02 17:15:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 2884 states have (on average 1.3984049930651872) internal successors, (4033), 2951 states have internal predecessors, (4033), 953 states have call successors, (953), 365 states have call predecessors, (953), 345 states have return successors, (941), 890 states have call predecessors, (941), 937 states have call successors, (941) [2023-12-02 17:15:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 5927 transitions. [2023-12-02 17:15:22,232 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 5927 transitions. Word has length 69 [2023-12-02 17:15:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:22,233 INFO L495 AbstractCegarLoop]: Abstraction has 4183 states and 5927 transitions. [2023-12-02 17:15:22,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 17:15:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 5927 transitions. [2023-12-02 17:15:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:15:22,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:22,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:22,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:15:22,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:22,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash 836728908, now seen corresponding path program 1 times [2023-12-02 17:15:22,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:22,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576479444] [2023-12-02 17:15:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:22,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:15:23,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:23,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576479444] [2023-12-02 17:15:23,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576479444] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:23,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:23,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:15:23,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835708711] [2023-12-02 17:15:23,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:23,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:23,263 INFO L87 Difference]: Start difference. First operand 4183 states and 5927 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:15:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:24,185 INFO L93 Difference]: Finished difference Result 10435 states and 14866 transitions. [2023-12-02 17:15:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:24,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2023-12-02 17:15:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:24,223 INFO L225 Difference]: With dead ends: 10435 [2023-12-02 17:15:24,223 INFO L226 Difference]: Without dead ends: 6268 [2023-12-02 17:15:24,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:15:24,239 INFO L413 NwaCegarLoop]: 1151 mSDtfsCounter, 628 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:24,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1750 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:15:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6268 states. [2023-12-02 17:15:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6268 to 6253. [2023-12-02 17:15:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6253 states, 4371 states have (on average 1.405170441546557) internal successors, (6142), 4460 states have internal predecessors, (6142), 1379 states have call successors, (1379), 526 states have call predecessors, (1379), 502 states have return successors, (1369), 1302 states have call predecessors, (1369), 1363 states have call successors, (1369) [2023-12-02 17:15:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6253 states to 6253 states and 8890 transitions. [2023-12-02 17:15:24,530 INFO L78 Accepts]: Start accepts. Automaton has 6253 states and 8890 transitions. Word has length 70 [2023-12-02 17:15:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:24,531 INFO L495 AbstractCegarLoop]: Abstraction has 6253 states and 8890 transitions. [2023-12-02 17:15:24,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:15:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6253 states and 8890 transitions. [2023-12-02 17:15:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 17:15:24,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:24,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:24,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:15:24,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:24,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1407302970, now seen corresponding path program 1 times [2023-12-02 17:15:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:24,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781658260] [2023-12-02 17:15:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:15:26,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:26,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781658260] [2023-12-02 17:15:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781658260] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:26,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:26,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:15:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268728146] [2023-12-02 17:15:26,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:26,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:15:26,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:15:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:15:26,325 INFO L87 Difference]: Start difference. First operand 6253 states and 8890 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:15:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:27,968 INFO L93 Difference]: Finished difference Result 14270 states and 20640 transitions. [2023-12-02 17:15:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:15:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 88 [2023-12-02 17:15:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:28,015 INFO L225 Difference]: With dead ends: 14270 [2023-12-02 17:15:28,016 INFO L226 Difference]: Without dead ends: 8033 [2023-12-02 17:15:28,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:15:28,041 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 199 mSDsluCounter, 2746 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 3485 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:28,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 3485 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:15:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2023-12-02 17:15:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 6325. [2023-12-02 17:15:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6325 states, 4443 states have (on average 1.4013054242628855) internal successors, (6226), 4532 states have internal predecessors, (6226), 1379 states have call successors, (1379), 526 states have call predecessors, (1379), 502 states have return successors, (1369), 1302 states have call predecessors, (1369), 1363 states have call successors, (1369) [2023-12-02 17:15:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6325 states to 6325 states and 8974 transitions. [2023-12-02 17:15:28,423 INFO L78 Accepts]: Start accepts. Automaton has 6325 states and 8974 transitions. Word has length 88 [2023-12-02 17:15:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:28,423 INFO L495 AbstractCegarLoop]: Abstraction has 6325 states and 8974 transitions. [2023-12-02 17:15:28,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:15:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6325 states and 8974 transitions. [2023-12-02 17:15:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 17:15:28,427 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:28,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:28,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:15:28,428 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:28,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 360272797, now seen corresponding path program 1 times [2023-12-02 17:15:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:28,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607617002] [2023-12-02 17:15:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:28,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:15:31,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607617002] [2023-12-02 17:15:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607617002] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993502719] [2023-12-02 17:15:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:31,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:31,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:31,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:31,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:15:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:33,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 13621 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:15:33,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:15:33,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:15:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993502719] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:33,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:15:33,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-12-02 17:15:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836441933] [2023-12-02 17:15:33,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:15:33,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:15:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:15:33,298 INFO L87 Difference]: Start difference. First operand 6325 states and 8974 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:15:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:34,761 INFO L93 Difference]: Finished difference Result 12719 states and 18008 transitions. [2023-12-02 17:15:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:15:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2023-12-02 17:15:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:34,790 INFO L225 Difference]: With dead ends: 12719 [2023-12-02 17:15:34,791 INFO L226 Difference]: Without dead ends: 6308 [2023-12-02 17:15:34,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:15:34,817 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 702 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 2966 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:34,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 2966 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 17:15:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6308 states. [2023-12-02 17:15:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6308 to 6059. [2023-12-02 17:15:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6059 states, 4253 states have (on average 1.403715024688455) internal successors, (5970), 4342 states have internal predecessors, (5970), 1329 states have call successors, (1329), 500 states have call predecessors, (1329), 476 states have return successors, (1319), 1252 states have call predecessors, (1319), 1313 states have call successors, (1319) [2023-12-02 17:15:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6059 states to 6059 states and 8618 transitions. [2023-12-02 17:15:35,182 INFO L78 Accepts]: Start accepts. Automaton has 6059 states and 8618 transitions. Word has length 109 [2023-12-02 17:15:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:35,182 INFO L495 AbstractCegarLoop]: Abstraction has 6059 states and 8618 transitions. [2023-12-02 17:15:35,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:15:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6059 states and 8618 transitions. [2023-12-02 17:15:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 17:15:35,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:35,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:35,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:15:35,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:35,388 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:35,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:35,388 INFO L85 PathProgramCache]: Analyzing trace with hash 907825865, now seen corresponding path program 1 times [2023-12-02 17:15:35,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:35,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682857344] [2023-12-02 17:15:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:35,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 17:15:37,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:37,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682857344] [2023-12-02 17:15:37,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682857344] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:37,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238951940] [2023-12-02 17:15:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:37,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:37,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:37,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:15:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:39,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 13711 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:15:39,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:15:40,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:15:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:15:40,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238951940] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:40,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:15:40,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 10 [2023-12-02 17:15:40,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51854482] [2023-12-02 17:15:40,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:40,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:40,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:15:40,224 INFO L87 Difference]: Start difference. First operand 6059 states and 8618 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:15:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:41,297 INFO L93 Difference]: Finished difference Result 16207 states and 23115 transitions. [2023-12-02 17:15:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2023-12-02 17:15:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:41,337 INFO L225 Difference]: With dead ends: 16207 [2023-12-02 17:15:41,338 INFO L226 Difference]: Without dead ends: 10164 [2023-12-02 17:15:41,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:15:41,358 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 650 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:41,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1184 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:15:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10164 states. [2023-12-02 17:15:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10164 to 10122. [2023-12-02 17:15:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10122 states, 7169 states have (on average 1.4149811689217464) internal successors, (10144), 7303 states have internal predecessors, (10144), 2165 states have call successors, (2165), 822 states have call predecessors, (2165), 787 states have return successors, (2160), 2056 states have call predecessors, (2160), 2150 states have call successors, (2160) [2023-12-02 17:15:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10122 states to 10122 states and 14469 transitions. [2023-12-02 17:15:41,903 INFO L78 Accepts]: Start accepts. Automaton has 10122 states and 14469 transitions. Word has length 117 [2023-12-02 17:15:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:41,904 INFO L495 AbstractCegarLoop]: Abstraction has 10122 states and 14469 transitions. [2023-12-02 17:15:41,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:15:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 10122 states and 14469 transitions. [2023-12-02 17:15:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 17:15:41,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:41,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:41,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 17:15:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 17:15:42,109 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:42,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash 177971631, now seen corresponding path program 1 times [2023-12-02 17:15:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587073719] [2023-12-02 17:15:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:15:44,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587073719] [2023-12-02 17:15:44,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587073719] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549612889] [2023-12-02 17:15:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:44,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:44,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:44,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:44,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:15:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:46,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 13709 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:15:46,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:15:46,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:15:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:15:46,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549612889] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:46,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:15:46,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 16 [2023-12-02 17:15:46,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001619049] [2023-12-02 17:15:46,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:46,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:15:46,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:15:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:15:46,987 INFO L87 Difference]: Start difference. First operand 10122 states and 14469 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:15:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:49,124 INFO L93 Difference]: Finished difference Result 30354 states and 43742 transitions. [2023-12-02 17:15:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:15:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2023-12-02 17:15:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:49,181 INFO L225 Difference]: With dead ends: 30354 [2023-12-02 17:15:49,182 INFO L226 Difference]: Without dead ends: 20248 [2023-12-02 17:15:49,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:15:49,202 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 1770 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:49,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 1740 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 17:15:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20248 states. [2023-12-02 17:15:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20248 to 18185. [2023-12-02 17:15:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18185 states, 12965 states have (on average 1.4227535672965677) internal successors, (18446), 13190 states have internal predecessors, (18446), 3822 states have call successors, (3822), 1450 states have call predecessors, (3822), 1397 states have return successors, (3826), 3652 states have call predecessors, (3826), 3808 states have call successors, (3826) [2023-12-02 17:15:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18185 states to 18185 states and 26094 transitions. [2023-12-02 17:15:50,235 INFO L78 Accepts]: Start accepts. Automaton has 18185 states and 26094 transitions. Word has length 116 [2023-12-02 17:15:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:50,235 INFO L495 AbstractCegarLoop]: Abstraction has 18185 states and 26094 transitions. [2023-12-02 17:15:50,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:15:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 18185 states and 26094 transitions. [2023-12-02 17:15:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 17:15:50,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:50,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:50,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:15:50,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 17:15:50,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:50,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:50,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1113775659, now seen corresponding path program 1 times [2023-12-02 17:15:50,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:50,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999843469] [2023-12-02 17:15:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:50,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 17:15:52,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999843469] [2023-12-02 17:15:52,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999843469] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:52,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584207431] [2023-12-02 17:15:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:52,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:52,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:52,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:52,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:15:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:54,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 13719 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:15:54,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:15:54,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:15:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 17:15:54,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584207431] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:54,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:15:54,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 10 [2023-12-02 17:15:54,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125743327] [2023-12-02 17:15:54,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:54,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:15:54,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:54,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:15:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:15:54,935 INFO L87 Difference]: Start difference. First operand 18185 states and 26094 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:15:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:56,829 INFO L93 Difference]: Finished difference Result 52439 states and 75375 transitions. [2023-12-02 17:15:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:15:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 121 [2023-12-02 17:15:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:56,933 INFO L225 Difference]: With dead ends: 52439 [2023-12-02 17:15:56,933 INFO L226 Difference]: Without dead ends: 34270 [2023-12-02 17:15:56,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:15:56,970 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 650 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:56,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1184 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:15:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34270 states. [2023-12-02 17:15:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34270 to 34200. [2023-12-02 17:15:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34200 states, 24493 states have (on average 1.4275915567713224) internal successors, (34966), 24901 states have internal predecessors, (34966), 7107 states have call successors, (7107), 2682 states have call predecessors, (7107), 2599 states have return successors, (7128), 6820 states have call predecessors, (7128), 7094 states have call successors, (7128) [2023-12-02 17:15:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34200 states to 34200 states and 49201 transitions. [2023-12-02 17:15:58,659 INFO L78 Accepts]: Start accepts. Automaton has 34200 states and 49201 transitions. Word has length 121 [2023-12-02 17:15:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:58,659 INFO L495 AbstractCegarLoop]: Abstraction has 34200 states and 49201 transitions. [2023-12-02 17:15:58,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:15:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 34200 states and 49201 transitions. [2023-12-02 17:15:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 17:15:58,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:58,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:58,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:15:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:58,867 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:58,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -47895132, now seen corresponding path program 1 times [2023-12-02 17:15:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:58,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771755888] [2023-12-02 17:15:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:58,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 17:16:01,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771755888] [2023-12-02 17:16:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771755888] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:16:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177614622] [2023-12-02 17:16:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:01,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:01,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:01,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:01,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dabbb53-ee06-4c07-b47f-d4814de9dc13/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:16:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:03,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 13737 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:16:03,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:16:03,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:16:03,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177614622] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741497615] [2023-12-02 17:16:03,783 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2023-12-02 17:16:03,783 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:03,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:03,791 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:03,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs