./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ --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 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:50:42,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:50:42,567 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:50:42,573 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:50:42,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:50:42,612 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:50:42,613 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:50:42,614 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:50:42,616 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:50:42,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:50:42,622 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:50:42,622 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:50:42,623 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:50:42,625 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:50:42,625 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:50:42,626 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:50:42,626 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:50:42,627 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:50:42,627 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:50:42,628 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:50:42,629 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:50:42,629 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:50:42,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:50:42,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:50:42,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:50:42,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:50:42,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:50:42,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:50:42,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:50:42,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:50:42,638 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:50:42,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:50:42,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:50:42,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:42,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:50:42,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:50:42,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:50:42,641 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:50:42,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:50:42,642 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:50:42,642 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:50:42,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:50:42,643 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_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 [2023-11-19 04:50:42,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:50:43,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:50:43,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:50:43,022 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:50:43,023 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:50:43,024 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2023-11-19 04:50:46,276 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:50:47,001 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:50:47,002 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2023-11-19 04:50:47,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/data/69f444320/6dc4b6adb88340ccb3b074c1eb850eac/FLAGd1e8641a6 [2023-11-19 04:50:47,062 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/data/69f444320/6dc4b6adb88340ccb3b074c1eb850eac [2023-11-19 04:50:47,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:50:47,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:50:47,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:47,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:50:47,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:50:47,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:47" (1/1) ... [2023-11-19 04:50:47,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515c6582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:47, skipping insertion in model container [2023-11-19 04:50:47,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:47" (1/1) ... [2023-11-19 04:50:47,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:50:48,965 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_e0ef982e-431d-470e-b216-7636b3ad4568/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i[138616,138629] [2023-11-19 04:50:49,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:49,163 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:50:49,501 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_e0ef982e-431d-470e-b216-7636b3ad4568/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i[138616,138629] [2023-11-19 04:50:49,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:49,589 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:50:49,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49 WrapperNode [2023-11-19 04:50:49,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:49,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:49,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:50:49,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:50:49,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,666 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,751 INFO L138 Inliner]: procedures = 161, calls = 847, calls flagged for inlining = 53, calls inlined = 28, statements flattened = 1159 [2023-11-19 04:50:49,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:49,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:50:49,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:50:49,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:50:49,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:49,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:50:49,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:50:49,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:50:49,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:50:49,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (1/1) ... [2023-11-19 04:50:50,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:50,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:50,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:50:50,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:50:50,105 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-19 04:50:50,105 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-19 04:50:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure pf_getgeo [2023-11-19 04:50:50,106 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_getgeo [2023-11-19 04:50:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-19 04:50:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-19 04:50:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-19 04:50:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-19 04:50:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-19 04:50:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-19 04:50:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:50:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pf_mutex [2023-11-19 04:50:50,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pf_mutex [2023-11-19 04:50:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure pf_reset [2023-11-19 04:50:50,110 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_reset [2023-11-19 04:50:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:50:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2023-11-19 04:50:50,111 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2023-11-19 04:50:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure pf_wait [2023-11-19 04:50:50,111 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_wait [2023-11-19 04:50:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-19 04:50:50,112 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-19 04:50:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:50:50,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:50:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pf_mutex [2023-11-19 04:50:50,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pf_mutex [2023-11-19 04:50:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure pf_check_events [2023-11-19 04:50:50,113 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_check_events [2023-11-19 04:50:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2023-11-19 04:50:50,113 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2023-11-19 04:50:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:50:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 04:50:50,114 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 04:50:50,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:50:50,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:50:50,114 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2023-11-19 04:50:50,114 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2023-11-19 04:50:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure pf_req_sense [2023-11-19 04:50:50,117 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_req_sense [2023-11-19 04:50:50,117 INFO L130 BoogieDeclarations]: Found specification of procedure pf_completion [2023-11-19 04:50:50,117 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_completion [2023-11-19 04:50:50,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:50:50,117 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-19 04:50:50,117 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-19 04:50:50,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:50:50,118 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-19 04:50:50,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-19 04:50:50,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:50:50,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:50:50,118 INFO L130 BoogieDeclarations]: Found specification of procedure pf_atapi [2023-11-19 04:50:50,119 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_atapi [2023-11-19 04:50:50,119 INFO L130 BoogieDeclarations]: Found specification of procedure pf_command [2023-11-19 04:50:50,119 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_command [2023-11-19 04:50:50,119 INFO L130 BoogieDeclarations]: Found specification of procedure pf_probe [2023-11-19 04:50:50,119 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_probe [2023-11-19 04:50:50,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:50:50,119 INFO L130 BoogieDeclarations]: Found specification of procedure pf_identify [2023-11-19 04:50:50,120 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_identify [2023-11-19 04:50:50,120 INFO L130 BoogieDeclarations]: Found specification of procedure pf_sleep [2023-11-19 04:50:50,120 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_sleep [2023-11-19 04:50:50,120 INFO L130 BoogieDeclarations]: Found specification of procedure pf_mode_sense [2023-11-19 04:50:50,121 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_mode_sense [2023-11-19 04:50:50,121 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2023-11-19 04:50:50,122 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2023-11-19 04:50:50,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:50:50,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:50:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-19 04:50:50,125 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-19 04:50:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-19 04:50:50,125 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-19 04:50:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:50:50,125 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:50:50,125 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-19 04:50:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-19 04:50:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2023-11-19 04:50:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2023-11-19 04:50:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure get_capacity [2023-11-19 04:50:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure get_capacity [2023-11-19 04:50:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure pf_lock [2023-11-19 04:50:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_lock [2023-11-19 04:50:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:50:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure xl [2023-11-19 04:50:50,127 INFO L138 BoogieDeclarations]: Found implementation of procedure xl [2023-11-19 04:50:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:50:50,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:50:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2023-11-19 04:50:50,127 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2023-11-19 04:50:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure pf_ioctl [2023-11-19 04:50:50,128 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_ioctl [2023-11-19 04:50:50,572 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:50:50,576 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:50:55,029 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:50:55,620 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:50:55,620 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 04:50:55,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:55 BoogieIcfgContainer [2023-11-19 04:50:55,639 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:50:55,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:50:55,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:50:55,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:50:55,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:50:47" (1/3) ... [2023-11-19 04:50:55,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbeff22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:55, skipping insertion in model container [2023-11-19 04:50:55,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:49" (2/3) ... [2023-11-19 04:50:55,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbeff22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:55, skipping insertion in model container [2023-11-19 04:50:55,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:55" (3/3) ... [2023-11-19 04:50:55,656 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2023-11-19 04:50:55,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:50:55,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:50:55,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:50:55,804 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;@39889907, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:50:55,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:50:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 445 states, 279 states have (on average 1.3655913978494623) internal successors, (381), 293 states have internal predecessors, (381), 128 states have call successors, (128), 38 states have call predecessors, (128), 38 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-19 04:50:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:50:55,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:55,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:55,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:55,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash 330059723, now seen corresponding path program 1 times [2023-11-19 04:50:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:55,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822328438] [2023-11-19 04:50:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:55,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:56,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:56,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822328438] [2023-11-19 04:50:56,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822328438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:56,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:56,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:50:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688267988] [2023-11-19 04:50:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:56,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:56,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:56,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:56,599 INFO L87 Difference]: Start difference. First operand has 445 states, 279 states have (on average 1.3655913978494623) internal successors, (381), 293 states have internal predecessors, (381), 128 states have call successors, (128), 38 states have call predecessors, (128), 38 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:58,097 INFO L93 Difference]: Finished difference Result 1228 states and 1795 transitions. [2023-11-19 04:50:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:58,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 04:50:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:58,142 INFO L225 Difference]: With dead ends: 1228 [2023-11-19 04:50:58,142 INFO L226 Difference]: Without dead ends: 780 [2023-11-19 04:50:58,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:58,163 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 479 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:58,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1285 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 04:50:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-11-19 04:50:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 767. [2023-11-19 04:50:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 481 states have (on average 1.345114345114345) internal successors, (647), 494 states have internal predecessors, (647), 219 states have call successors, (219), 67 states have call predecessors, (219), 66 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-19 04:50:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1079 transitions. [2023-11-19 04:50:58,411 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1079 transitions. Word has length 14 [2023-11-19 04:50:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:58,416 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1079 transitions. [2023-11-19 04:50:58,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1079 transitions. [2023-11-19 04:50:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:50:58,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:58,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:58,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:50:58,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:58,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash -666549377, now seen corresponding path program 1 times [2023-11-19 04:50:58,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:58,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257962337] [2023-11-19 04:50:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:58,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257962337] [2023-11-19 04:50:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257962337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:58,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:58,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184276532] [2023-11-19 04:50:58,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:58,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:58,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:58,729 INFO L87 Difference]: Start difference. First operand 767 states and 1079 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:00,120 INFO L93 Difference]: Finished difference Result 1737 states and 2422 transitions. [2023-11-19 04:51:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-19 04:51:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:00,131 INFO L225 Difference]: With dead ends: 1737 [2023-11-19 04:51:00,132 INFO L226 Difference]: Without dead ends: 971 [2023-11-19 04:51:00,136 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 [2023-11-19 04:51:00,138 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 444 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:00,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1117 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:51:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-11-19 04:51:00,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 643. [2023-11-19 04:51:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 398 states have (on average 1.3316582914572865) internal successors, (530), 410 states have internal predecessors, (530), 183 states have call successors, (183), 62 states have call predecessors, (183), 61 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-19 04:51:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 890 transitions. [2023-11-19 04:51:00,210 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 890 transitions. Word has length 16 [2023-11-19 04:51:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:00,211 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 890 transitions. [2023-11-19 04:51:00,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 890 transitions. [2023-11-19 04:51:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:51:00,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:00,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:00,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:51:00,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:00,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:00,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1718030935, now seen corresponding path program 1 times [2023-11-19 04:51:00,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:00,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85205021] [2023-11-19 04:51:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:00,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:00,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:00,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85205021] [2023-11-19 04:51:00,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85205021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:00,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:00,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:51:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842080088] [2023-11-19 04:51:00,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:00,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:51:00,392 INFO L87 Difference]: Start difference. First operand 643 states and 890 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:01,029 INFO L93 Difference]: Finished difference Result 1276 states and 1766 transitions. [2023-11-19 04:51:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 04:51:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:01,036 INFO L225 Difference]: With dead ends: 1276 [2023-11-19 04:51:01,036 INFO L226 Difference]: Without dead ends: 643 [2023-11-19 04:51:01,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:51:01,041 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 606 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:01,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 541 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:51:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-11-19 04:51:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2023-11-19 04:51:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 398 states have (on average 1.329145728643216) internal successors, (529), 410 states have internal predecessors, (529), 183 states have call successors, (183), 62 states have call predecessors, (183), 61 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-19 04:51:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 889 transitions. [2023-11-19 04:51:01,105 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 889 transitions. Word has length 15 [2023-11-19 04:51:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:01,105 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 889 transitions. [2023-11-19 04:51:01,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 889 transitions. [2023-11-19 04:51:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 04:51:01,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:01,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:01,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:51:01,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:01,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:01,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1453463943, now seen corresponding path program 1 times [2023-11-19 04:51:01,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:01,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484141290] [2023-11-19 04:51:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:01,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:01,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:01,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484141290] [2023-11-19 04:51:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484141290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:01,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:01,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:51:01,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122556761] [2023-11-19 04:51:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:01,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:01,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:01,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:01,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:51:01,271 INFO L87 Difference]: Start difference. First operand 643 states and 889 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:02,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:02,331 INFO L93 Difference]: Finished difference Result 1283 states and 1775 transitions. [2023-11-19 04:51:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:02,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-19 04:51:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:02,337 INFO L225 Difference]: With dead ends: 1283 [2023-11-19 04:51:02,338 INFO L226 Difference]: Without dead ends: 650 [2023-11-19 04:51:02,341 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 [2023-11-19 04:51:02,342 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 9 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:02,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1077 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:51:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-11-19 04:51:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 644. [2023-11-19 04:51:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 399 states have (on average 1.3283208020050126) internal successors, (530), 411 states have internal predecessors, (530), 183 states have call successors, (183), 62 states have call predecessors, (183), 61 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-19 04:51:02,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 890 transitions. [2023-11-19 04:51:02,399 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 890 transitions. Word has length 25 [2023-11-19 04:51:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:02,399 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 890 transitions. [2023-11-19 04:51:02,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 890 transitions. [2023-11-19 04:51:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:51:02,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:02,402 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] [2023-11-19 04:51:02,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:51:02,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:02,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash -184441180, now seen corresponding path program 1 times [2023-11-19 04:51:02,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:02,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743256097] [2023-11-19 04:51:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:02,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:02,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:02,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743256097] [2023-11-19 04:51:02,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743256097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728639107] [2023-11-19 04:51:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:02,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:02,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:02,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:51:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:03,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:51:03,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:51:03,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:03,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728639107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:03,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:51:03,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189142691] [2023-11-19 04:51:03,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:03,210 INFO L87 Difference]: Start difference. First operand 644 states and 890 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:04,135 INFO L93 Difference]: Finished difference Result 1295 states and 1794 transitions. [2023-11-19 04:51:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-19 04:51:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:04,142 INFO L225 Difference]: With dead ends: 1295 [2023-11-19 04:51:04,143 INFO L226 Difference]: Without dead ends: 661 [2023-11-19 04:51:04,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:04,148 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 14 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:04,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1090 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:51:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-19 04:51:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 646. [2023-11-19 04:51:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 401 states have (on average 1.3266832917705735) internal successors, (532), 413 states have internal predecessors, (532), 183 states have call successors, (183), 62 states have call predecessors, (183), 61 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-19 04:51:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 892 transitions. [2023-11-19 04:51:04,218 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 892 transitions. Word has length 28 [2023-11-19 04:51:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:04,219 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 892 transitions. [2023-11-19 04:51:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 892 transitions. [2023-11-19 04:51:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:51:04,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:04,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:04,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:04,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:04,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:04,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:04,449 INFO L85 PathProgramCache]: Analyzing trace with hash -127231285, now seen corresponding path program 1 times [2023-11-19 04:51:04,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:04,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256354638] [2023-11-19 04:51:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:04,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:51:04,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:04,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256354638] [2023-11-19 04:51:04,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256354638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:04,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418936644] [2023-11-19 04:51:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:04,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:04,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:51:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:05,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:05,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:51:05,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:05,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418936644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:51:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260077111] [2023-11-19 04:51:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:05,302 INFO L87 Difference]: Start difference. First operand 646 states and 892 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:06,625 INFO L93 Difference]: Finished difference Result 1894 states and 2610 transitions. [2023-11-19 04:51:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:06,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-11-19 04:51:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:06,639 INFO L225 Difference]: With dead ends: 1894 [2023-11-19 04:51:06,639 INFO L226 Difference]: Without dead ends: 1258 [2023-11-19 04:51:06,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:06,645 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 579 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:06,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1068 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 04:51:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-11-19 04:51:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 908. [2023-11-19 04:51:06,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 559 states have (on average 1.3112701252236136) internal successors, (733), 575 states have internal predecessors, (733), 261 states have call successors, (261), 88 states have call predecessors, (261), 87 states have return successors, (255), 254 states have call predecessors, (255), 255 states have call successors, (255) [2023-11-19 04:51:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1249 transitions. [2023-11-19 04:51:06,749 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1249 transitions. Word has length 31 [2023-11-19 04:51:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:06,750 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1249 transitions. [2023-11-19 04:51:06,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:51:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1249 transitions. [2023-11-19 04:51:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 04:51:06,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:06,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:06,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:06,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:06,969 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:06,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash 580794609, now seen corresponding path program 1 times [2023-11-19 04:51:06,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:06,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61642909] [2023-11-19 04:51:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:06,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:07,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:07,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61642909] [2023-11-19 04:51:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61642909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:07,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891623619] [2023-11-19 04:51:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:07,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:07,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:51:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:07,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:07,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:51:07,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:07,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891623619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:07,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:07,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:51:07,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834074452] [2023-11-19 04:51:07,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:07,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:07,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:07,703 INFO L87 Difference]: Start difference. First operand 908 states and 1249 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:51:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:08,726 INFO L93 Difference]: Finished difference Result 1823 states and 2512 transitions. [2023-11-19 04:51:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-19 04:51:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:08,742 INFO L225 Difference]: With dead ends: 1823 [2023-11-19 04:51:08,742 INFO L226 Difference]: Without dead ends: 925 [2023-11-19 04:51:08,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:08,748 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 24 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:08,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1062 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:51:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2023-11-19 04:51:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2023-11-19 04:51:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 571 states have (on average 1.3134851138353765) internal successors, (750), 587 states have internal predecessors, (750), 265 states have call successors, (265), 88 states have call predecessors, (265), 87 states have return successors, (259), 258 states have call predecessors, (259), 259 states have call successors, (259) [2023-11-19 04:51:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1274 transitions. [2023-11-19 04:51:08,862 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1274 transitions. Word has length 32 [2023-11-19 04:51:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:08,863 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1274 transitions. [2023-11-19 04:51:08,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:51:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1274 transitions. [2023-11-19 04:51:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 04:51:08,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:08,865 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:08,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:09,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:09,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:09,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash 94065067, now seen corresponding path program 1 times [2023-11-19 04:51:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:09,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907180121] [2023-11-19 04:51:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:09,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:51:09,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907180121] [2023-11-19 04:51:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907180121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210468574] [2023-11-19 04:51:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:09,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:09,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:09,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:51:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:09,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:09,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:51:09,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:09,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210468574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:09,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:09,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:51:09,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615241147] [2023-11-19 04:51:09,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:09,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:09,783 INFO L87 Difference]: Start difference. First operand 924 states and 1274 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:10,300 INFO L93 Difference]: Finished difference Result 926 states and 1275 transitions. [2023-11-19 04:51:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-11-19 04:51:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:10,309 INFO L225 Difference]: With dead ends: 926 [2023-11-19 04:51:10,309 INFO L226 Difference]: Without dead ends: 923 [2023-11-19 04:51:10,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:10,311 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 574 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:10,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 539 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:51:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-11-19 04:51:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 923. [2023-11-19 04:51:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 571 states have (on average 1.3117338003502628) internal successors, (749), 586 states have internal predecessors, (749), 264 states have call successors, (264), 88 states have call predecessors, (264), 87 states have return successors, (259), 258 states have call predecessors, (259), 259 states have call successors, (259) [2023-11-19 04:51:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1272 transitions. [2023-11-19 04:51:10,439 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1272 transitions. Word has length 42 [2023-11-19 04:51:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:10,440 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1272 transitions. [2023-11-19 04:51:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1272 transitions. [2023-11-19 04:51:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:51:10,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:10,445 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:10,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:10,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:10,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:10,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1379279185, now seen corresponding path program 1 times [2023-11-19 04:51:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:10,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192286082] [2023-11-19 04:51:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:10,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:51:10,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:10,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192286082] [2023-11-19 04:51:10,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192286082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:10,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247918696] [2023-11-19 04:51:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:10,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:10,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:10,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:10,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:51:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:11,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:11,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:51:11,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:11,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247918696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:11,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:11,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:51:11,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630278256] [2023-11-19 04:51:11,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:11,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:11,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:11,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:11,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:11,404 INFO L87 Difference]: Start difference. First operand 923 states and 1272 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:12,129 INFO L93 Difference]: Finished difference Result 925 states and 1273 transitions. [2023-11-19 04:51:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:12,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-11-19 04:51:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:12,138 INFO L225 Difference]: With dead ends: 925 [2023-11-19 04:51:12,138 INFO L226 Difference]: Without dead ends: 922 [2023-11-19 04:51:12,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:12,140 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 571 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:12,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 537 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:51:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2023-11-19 04:51:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2023-11-19 04:51:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 571 states have (on average 1.3099824868651488) internal successors, (748), 585 states have internal predecessors, (748), 263 states have call successors, (263), 88 states have call predecessors, (263), 87 states have return successors, (259), 258 states have call predecessors, (259), 259 states have call successors, (259) [2023-11-19 04:51:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1270 transitions. [2023-11-19 04:51:12,239 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1270 transitions. Word has length 43 [2023-11-19 04:51:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:12,240 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1270 transitions. [2023-11-19 04:51:12,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1270 transitions. [2023-11-19 04:51:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:51:12,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:12,242 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:12,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:12,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:12,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 191694126, now seen corresponding path program 1 times [2023-11-19 04:51:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361707639] [2023-11-19 04:51:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:51:12,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361707639] [2023-11-19 04:51:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361707639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675396119] [2023-11-19 04:51:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:12,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:12,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:12,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:51:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:13,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:13,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:51:13,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675396119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:13,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:51:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243475802] [2023-11-19 04:51:13,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:13,193 INFO L87 Difference]: Start difference. First operand 922 states and 1270 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:13,910 INFO L93 Difference]: Finished difference Result 924 states and 1271 transitions. [2023-11-19 04:51:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:13,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2023-11-19 04:51:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:13,919 INFO L225 Difference]: With dead ends: 924 [2023-11-19 04:51:13,919 INFO L226 Difference]: Without dead ends: 921 [2023-11-19 04:51:13,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:13,921 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 568 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:13,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 535 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:51:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-11-19 04:51:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2023-11-19 04:51:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 571 states have (on average 1.308231173380035) internal successors, (747), 584 states have internal predecessors, (747), 262 states have call successors, (262), 88 states have call predecessors, (262), 87 states have return successors, (259), 258 states have call predecessors, (259), 259 states have call successors, (259) [2023-11-19 04:51:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1268 transitions. [2023-11-19 04:51:14,012 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1268 transitions. Word has length 44 [2023-11-19 04:51:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1268 transitions. [2023-11-19 04:51:14,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1268 transitions. [2023-11-19 04:51:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 04:51:14,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:14,015 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:14,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:14,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:51:14,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:14,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1647231378, now seen corresponding path program 1 times [2023-11-19 04:51:14,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:14,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752261290] [2023-11-19 04:51:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:14,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:51:14,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:14,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752261290] [2023-11-19 04:51:14,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752261290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:14,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045576140] [2023-11-19 04:51:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:14,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:14,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:14,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:14,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:51:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:14,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:14,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:51:14,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:51:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045576140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:14,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:51:14,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 04:51:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141371608] [2023-11-19 04:51:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:14,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:14,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:14,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:14,990 INFO L87 Difference]: Start difference. First operand 921 states and 1268 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:16,060 INFO L93 Difference]: Finished difference Result 925 states and 1270 transitions. [2023-11-19 04:51:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2023-11-19 04:51:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:16,068 INFO L225 Difference]: With dead ends: 925 [2023-11-19 04:51:16,068 INFO L226 Difference]: Without dead ends: 901 [2023-11-19 04:51:16,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:16,070 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 511 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:16,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 921 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:51:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2023-11-19 04:51:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 901. [2023-11-19 04:51:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 558 states have (on average 1.3046594982078854) internal successors, (728), 569 states have internal predecessors, (728), 257 states have call successors, (257), 86 states have call predecessors, (257), 85 states have return successors, (256), 255 states have call predecessors, (256), 256 states have call successors, (256) [2023-11-19 04:51:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1241 transitions. [2023-11-19 04:51:16,168 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1241 transitions. Word has length 45 [2023-11-19 04:51:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:16,169 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1241 transitions. [2023-11-19 04:51:16,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:51:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1241 transitions. [2023-11-19 04:51:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:51:16,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:16,172 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, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:16,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:16,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:16,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:16,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2112060020, now seen corresponding path program 1 times [2023-11-19 04:51:16,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:16,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613635555] [2023-11-19 04:51:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:16,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:51:16,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613635555] [2023-11-19 04:51:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613635555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814290190] [2023-11-19 04:51:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:16,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:16,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:16,590 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:16,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ef982e-431d-470e-b216-7636b3ad4568/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:51:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:16,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:17,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:51:17,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:51:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:51:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814290190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:51:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1939685480] [2023-11-19 04:51:17,194 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-11-19 04:51:17,195 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:51:17,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:51:17,209 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:51:17,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs