./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 32c3d0de0693c88d7932ff8b6e02d1235a8aa90cfbd4ebc203b8adf917998be1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 16:08:32,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:08:32,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:08:32,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:08:32,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:08:32,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:08:32,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:08:32,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:08:32,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:08:32,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:08:32,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:08:32,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:08:32,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:08:32,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:08:32,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:08:32,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:08:32,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:08:32,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:08:32,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:08:32,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:08:32,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:08:32,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:08:32,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:08:32,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:08:32,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:08:32,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:08:32,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:08:32,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:08:32,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:08:32,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:08:32,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:08:32,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:08:32,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:08:32,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:08:32,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:08:32,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:08:32,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:08:32,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:08:32,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:08:32,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:08:32,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:08:32,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 16:08:32,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:08:32,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:08:32,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:08:32,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:08:32,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:08:32,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:08:32,633 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:08:32,633 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:08:32,634 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:08:32,634 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:08:32,635 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:08:32,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:08:32,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:08:32,636 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:08:32,636 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:08:32,636 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:08:32,636 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:08:32,637 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:08:32,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:08:32,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:08:32,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:08:32,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:08:32,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:08:32,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:08:32,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:08:32,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:08:32,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:08:32,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:08:32,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:08:32,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:08:32,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:08:32,641 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:08:32,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:08:32,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:08:32,642 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:08:32,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:08:32,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:08:32,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:08:32,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32c3d0de0693c88d7932ff8b6e02d1235a8aa90cfbd4ebc203b8adf917998be1 [2022-11-23 16:08:32,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:08:32,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:08:32,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:08:32,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:08:32,929 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:08:32,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2022-11-23 16:08:35,881 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:08:36,425 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:08:36,426 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2022-11-23 16:08:36,454 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/data/937ad689c/17e137e4db394908aa3e9269768d3b8e/FLAG9e68b9743 [2022-11-23 16:08:36,470 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/data/937ad689c/17e137e4db394908aa3e9269768d3b8e [2022-11-23 16:08:36,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:08:36,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:08:36,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:08:36,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:08:36,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:08:36,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:08:36" (1/1) ... [2022-11-23 16:08:36,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f48feb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:36, skipping insertion in model container [2022-11-23 16:08:36,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:08:36" (1/1) ... [2022-11-23 16:08:36,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:08:36,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:08:37,741 WARN L237 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_78ae04d2-38b5-41e4-af21-a8a90ddef75f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i[192198,192211] [2022-11-23 16:08:37,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:08:38,015 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:08:38,236 WARN L237 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_78ae04d2-38b5-41e4-af21-a8a90ddef75f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i[192198,192211] [2022-11-23 16:08:38,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:08:38,477 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:08:38,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38 WrapperNode [2022-11-23 16:08:38,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:08:38,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:08:38,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:08:38,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:08:38,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:38,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:38,920 INFO L138 Inliner]: procedures = 165, calls = 5858, calls flagged for inlining = 57, calls inlined = 52, statements flattened = 7002 [2022-11-23 16:08:38,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:08:38,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:08:38,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:08:38,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:08:38,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:38,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,260 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:08:39,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:08:39,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:08:39,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:08:39,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (1/1) ... [2022-11-23 16:08:39,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:08:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:08:39,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:08:39,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:08:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_while_busy [2022-11-23 16:08:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_while_busy [2022-11-23 16:08:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-23 16:08:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-23 16:08:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_for_read [2022-11-23 16:08:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_for_read [2022-11-23 16:08:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-23 16:08:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-23 16:08:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2022-11-23 16:08:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2022-11-23 16:08:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_remove [2022-11-23 16:08:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_remove [2022-11-23 16:08:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure dmi_get_system_info [2022-11-23 16:08:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure dmi_get_system_info [2022-11-23 16:08:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 16:08:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 16:08:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:08:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 16:08:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 16:08:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read [2022-11-23 16:08:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read [2022-11-23 16:08:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 16:08:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 16:08:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:08:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 16:08:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 16:08:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 16:08:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 16:08:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_probe [2022-11-23 16:08:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_probe [2022-11-23 16:08:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-23 16:08:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-23 16:08:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2022-11-23 16:08:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2022-11-23 16:08:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 16:08:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 16:08:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_suspend [2022-11-23 16:08:39,490 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_suspend [2022-11-23 16:08:39,490 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 16:08:39,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 16:08:39,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 16:08:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 16:08:39,491 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read_increment_offset [2022-11-23 16:08:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read_increment_offset [2022-11-23 16:08:39,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 16:08:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2022-11-23 16:08:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2022-11-23 16:08:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-23 16:08:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-23 16:08:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:08:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:08:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 16:08:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_update_device [2022-11-23 16:08:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_update_device [2022-11-23 16:08:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 16:08:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 16:08:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 16:08:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:08:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 16:08:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2022-11-23 16:08:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2022-11-23 16:08:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-11-23 16:08:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-23 16:08:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-23 16:08:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-23 16:08:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-23 16:08:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:08:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-23 16:08:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-23 16:08:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:08:39,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:08:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_resume [2022-11-23 16:08:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_resume [2022-11-23 16:08:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 16:08:39,498 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 16:08:39,898 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:08:39,902 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:08:42,804 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 16:08:56,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:08:57,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:08:57,485 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 16:08:57,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:08:57 BoogieIcfgContainer [2022-11-23 16:08:57,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:08:57,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:08:57,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:08:57,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:08:57,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:08:36" (1/3) ... [2022-11-23 16:08:57,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f49b79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:08:57, skipping insertion in model container [2022-11-23 16:08:57,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:08:38" (2/3) ... [2022-11-23 16:08:57,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f49b79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:08:57, skipping insertion in model container [2022-11-23 16:08:57,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:08:57" (3/3) ... [2022-11-23 16:08:57,508 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2022-11-23 16:08:57,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:08:57,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:08:57,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:08:57,659 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=LoopsAndPotentialCycles, 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;@dbf4ebb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:08:57,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:08:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 296 states have (on average 1.445945945945946) internal successors, (428), 309 states have internal predecessors, (428), 101 states have call successors, (101), 31 states have call predecessors, (101), 30 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-23 16:08:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 16:08:57,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:57,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:57,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1403761057, now seen corresponding path program 1 times [2022-11-23 16:08:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:57,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980850356] [2022-11-23 16:08:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:00,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:00,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980850356] [2022-11-23 16:09:00,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980850356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:00,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:00,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:00,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856723772] [2022-11-23 16:09:00,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:00,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:00,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:00,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:00,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:00,345 INFO L87 Difference]: Start difference. First operand has 429 states, 296 states have (on average 1.445945945945946) internal successors, (428), 309 states have internal predecessors, (428), 101 states have call successors, (101), 31 states have call predecessors, (101), 30 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:09:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:01,419 INFO L93 Difference]: Finished difference Result 1219 states and 1802 transitions. [2022-11-23 16:09:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:01,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-23 16:09:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:01,462 INFO L225 Difference]: With dead ends: 1219 [2022-11-23 16:09:01,462 INFO L226 Difference]: Without dead ends: 779 [2022-11-23 16:09:01,476 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 [2022-11-23 16:09:01,485 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 592 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:01,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1074 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 16:09:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-23 16:09:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 775. [2022-11-23 16:09:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 539 states have (on average 1.4230055658627088) internal successors, (767), 549 states have internal predecessors, (767), 178 states have call successors, (178), 58 states have call predecessors, (178), 57 states have return successors, (173), 173 states have call predecessors, (173), 173 states have call successors, (173) [2022-11-23 16:09:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1118 transitions. [2022-11-23 16:09:01,663 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1118 transitions. Word has length 15 [2022-11-23 16:09:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:01,664 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1118 transitions. [2022-11-23 16:09:01,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:09:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1118 transitions. [2022-11-23 16:09:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 16:09:01,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:01,668 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] [2022-11-23 16:09:01,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:09:01,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash -759779737, now seen corresponding path program 1 times [2022-11-23 16:09:01,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:01,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330009825] [2022-11-23 16:09:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:02,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:02,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330009825] [2022-11-23 16:09:02,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330009825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:02,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:02,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338321991] [2022-11-23 16:09:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:02,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:02,921 INFO L87 Difference]: Start difference. First operand 775 states and 1118 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:09:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:03,819 INFO L93 Difference]: Finished difference Result 2205 states and 3161 transitions. [2022-11-23 16:09:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-23 16:09:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:03,835 INFO L225 Difference]: With dead ends: 2205 [2022-11-23 16:09:03,836 INFO L226 Difference]: Without dead ends: 1431 [2022-11-23 16:09:03,840 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 [2022-11-23 16:09:03,847 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 509 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:03,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1110 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 16:09:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-11-23 16:09:03,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1416. [2022-11-23 16:09:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 985 states have (on average 1.4060913705583757) internal successors, (1385), 1001 states have internal predecessors, (1385), 323 states have call successors, (323), 108 states have call predecessors, (323), 107 states have return successors, (318), 318 states have call predecessors, (318), 318 states have call successors, (318) [2022-11-23 16:09:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2026 transitions. [2022-11-23 16:09:03,960 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2026 transitions. Word has length 20 [2022-11-23 16:09:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:03,961 INFO L495 AbstractCegarLoop]: Abstraction has 1416 states and 2026 transitions. [2022-11-23 16:09:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:09:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2026 transitions. [2022-11-23 16:09:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 16:09:03,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:03,970 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] [2022-11-23 16:09:03,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:09:03,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2111119490, now seen corresponding path program 1 times [2022-11-23 16:09:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:03,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427338889] [2022-11-23 16:09:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:05,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427338889] [2022-11-23 16:09:05,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427338889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:05,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:05,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:05,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764857318] [2022-11-23 16:09:05,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:05,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:05,007 INFO L87 Difference]: Start difference. First operand 1416 states and 2026 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:09:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:05,589 INFO L93 Difference]: Finished difference Result 1418 states and 2027 transitions. [2022-11-23 16:09:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-23 16:09:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:05,601 INFO L225 Difference]: With dead ends: 1418 [2022-11-23 16:09:05,601 INFO L226 Difference]: Without dead ends: 1415 [2022-11-23 16:09:05,602 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 [2022-11-23 16:09:05,604 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 591 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:05,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 519 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:09:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-11-23 16:09:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1415. [2022-11-23 16:09:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 985 states have (on average 1.4050761421319797) internal successors, (1384), 1000 states have internal predecessors, (1384), 322 states have call successors, (322), 108 states have call predecessors, (322), 107 states have return successors, (318), 318 states have call predecessors, (318), 318 states have call successors, (318) [2022-11-23 16:09:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2024 transitions. [2022-11-23 16:09:05,694 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2024 transitions. Word has length 27 [2022-11-23 16:09:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:05,695 INFO L495 AbstractCegarLoop]: Abstraction has 1415 states and 2024 transitions. [2022-11-23 16:09:05,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:09:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2024 transitions. [2022-11-23 16:09:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 16:09:05,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:05,697 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] [2022-11-23 16:09:05,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:09:05,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1020123514, now seen corresponding path program 1 times [2022-11-23 16:09:05,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:05,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204797162] [2022-11-23 16:09:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:05,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:06,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:06,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204797162] [2022-11-23 16:09:06,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204797162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:06,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:06,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:06,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712233419] [2022-11-23 16:09:06,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:06,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:06,656 INFO L87 Difference]: Start difference. First operand 1415 states and 2024 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:09:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:07,286 INFO L93 Difference]: Finished difference Result 1417 states and 2025 transitions. [2022-11-23 16:09:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-23 16:09:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:07,295 INFO L225 Difference]: With dead ends: 1417 [2022-11-23 16:09:07,295 INFO L226 Difference]: Without dead ends: 1414 [2022-11-23 16:09:07,296 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 [2022-11-23 16:09:07,297 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 588 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:07,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 517 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:09:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-11-23 16:09:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1414. [2022-11-23 16:09:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 985 states have (on average 1.4040609137055837) internal successors, (1383), 999 states have internal predecessors, (1383), 321 states have call successors, (321), 108 states have call predecessors, (321), 107 states have return successors, (318), 318 states have call predecessors, (318), 318 states have call successors, (318) [2022-11-23 16:09:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 2022 transitions. [2022-11-23 16:09:07,381 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 2022 transitions. Word has length 28 [2022-11-23 16:09:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:07,382 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 2022 transitions. [2022-11-23 16:09:07,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:09:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 2022 transitions. [2022-11-23 16:09:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 16:09:07,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:07,383 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] [2022-11-23 16:09:07,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:09:07,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1558991493, now seen corresponding path program 1 times [2022-11-23 16:09:07,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:07,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378024600] [2022-11-23 16:09:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:07,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:08,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378024600] [2022-11-23 16:09:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378024600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:08,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:08,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383381045] [2022-11-23 16:09:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:08,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:08,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:08,206 INFO L87 Difference]: Start difference. First operand 1414 states and 2022 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:09:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:08,970 INFO L93 Difference]: Finished difference Result 3934 states and 5640 transitions. [2022-11-23 16:09:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-23 16:09:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:08,989 INFO L225 Difference]: With dead ends: 3934 [2022-11-23 16:09:08,989 INFO L226 Difference]: Without dead ends: 2513 [2022-11-23 16:09:08,996 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 [2022-11-23 16:09:08,997 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 525 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:08,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1061 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 16:09:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2022-11-23 16:09:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2506. [2022-11-23 16:09:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 1743 states have (on average 1.3947217441193345) internal successors, (2431), 1780 states have internal predecessors, (2431), 581 states have call successors, (581), 195 states have call predecessors, (581), 181 states have return successors, (575), 554 states have call predecessors, (575), 571 states have call successors, (575) [2022-11-23 16:09:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3587 transitions. [2022-11-23 16:09:09,241 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3587 transitions. Word has length 29 [2022-11-23 16:09:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:09,242 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 3587 transitions. [2022-11-23 16:09:09,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:09:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3587 transitions. [2022-11-23 16:09:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 16:09:09,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:09,245 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] [2022-11-23 16:09:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:09:09,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1829151809, now seen corresponding path program 1 times [2022-11-23 16:09:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:09,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968886029] [2022-11-23 16:09:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:12,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:12,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968886029] [2022-11-23 16:09:12,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968886029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:12,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:12,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:09:12,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433766838] [2022-11-23 16:09:12,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:12,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:12,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:09:12,153 INFO L87 Difference]: Start difference. First operand 2506 states and 3587 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 16:09:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:13,460 INFO L93 Difference]: Finished difference Result 5765 states and 8200 transitions. [2022-11-23 16:09:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:09:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-11-23 16:09:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:13,483 INFO L225 Difference]: With dead ends: 5765 [2022-11-23 16:09:13,483 INFO L226 Difference]: Without dead ends: 3254 [2022-11-23 16:09:13,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:09:13,495 INFO L413 NwaCegarLoop]: 1023 mSDtfsCounter, 601 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:13,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 2550 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 16:09:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2022-11-23 16:09:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 3184. [2022-11-23 16:09:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 2203 states have (on average 1.3831139355424422) internal successors, (3047), 2250 states have internal predecessors, (3047), 738 states have call successors, (738), 256 states have call predecessors, (738), 242 states have return successors, (732), 707 states have call predecessors, (732), 728 states have call successors, (732) [2022-11-23 16:09:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4517 transitions. [2022-11-23 16:09:13,719 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4517 transitions. Word has length 55 [2022-11-23 16:09:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:13,720 INFO L495 AbstractCegarLoop]: Abstraction has 3184 states and 4517 transitions. [2022-11-23 16:09:13,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 16:09:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4517 transitions. [2022-11-23 16:09:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 16:09:13,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:13,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:13,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:09:13,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash -505533910, now seen corresponding path program 1 times [2022-11-23 16:09:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196481442] [2022-11-23 16:09:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:09:14,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:14,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196481442] [2022-11-23 16:09:14,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196481442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:14,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:14,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:14,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11437494] [2022-11-23 16:09:14,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:14,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:14,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:14,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:14,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:14,641 INFO L87 Difference]: Start difference. First operand 3184 states and 4517 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 16:09:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:15,497 INFO L93 Difference]: Finished difference Result 6865 states and 9680 transitions. [2022-11-23 16:09:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-11-23 16:09:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:15,518 INFO L225 Difference]: With dead ends: 6865 [2022-11-23 16:09:15,519 INFO L226 Difference]: Without dead ends: 3682 [2022-11-23 16:09:15,534 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 [2022-11-23 16:09:15,535 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 226 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:15,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1128 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 16:09:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2022-11-23 16:09:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3507. [2022-11-23 16:09:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 2450 states have (on average 1.3979591836734695) internal successors, (3425), 2509 states have internal predecessors, (3425), 761 states have call successors, (761), 315 states have call predecessors, (761), 295 states have return successors, (749), 706 states have call predecessors, (749), 745 states have call successors, (749) [2022-11-23 16:09:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 4935 transitions. [2022-11-23 16:09:15,796 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 4935 transitions. Word has length 69 [2022-11-23 16:09:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:15,796 INFO L495 AbstractCegarLoop]: Abstraction has 3507 states and 4935 transitions. [2022-11-23 16:09:15,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 16:09:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 4935 transitions. [2022-11-23 16:09:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 16:09:15,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:15,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:15,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:09:15,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1851686094, now seen corresponding path program 1 times [2022-11-23 16:09:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:15,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792924760] [2022-11-23 16:09:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:16,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792924760] [2022-11-23 16:09:16,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792924760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:16,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:16,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989389981] [2022-11-23 16:09:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:16,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:16,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:16,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:16,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:16,965 INFO L87 Difference]: Start difference. First operand 3507 states and 4935 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:09:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:18,064 INFO L93 Difference]: Finished difference Result 8745 states and 12386 transitions. [2022-11-23 16:09:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:18,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-11-23 16:09:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:18,101 INFO L225 Difference]: With dead ends: 8745 [2022-11-23 16:09:18,101 INFO L226 Difference]: Without dead ends: 5254 [2022-11-23 16:09:18,118 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 [2022-11-23 16:09:18,119 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 538 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:18,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1456 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:09:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2022-11-23 16:09:18,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 5239. [2022-11-23 16:09:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5239 states, 3720 states have (on average 1.4059139784946237) internal successors, (5230), 3797 states have internal predecessors, (5230), 1091 states have call successors, (1091), 451 states have call predecessors, (1091), 427 states have return successors, (1081), 1026 states have call predecessors, (1081), 1075 states have call successors, (1081) [2022-11-23 16:09:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5239 states to 5239 states and 7402 transitions. [2022-11-23 16:09:18,575 INFO L78 Accepts]: Start accepts. Automaton has 5239 states and 7402 transitions. Word has length 70 [2022-11-23 16:09:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:18,576 INFO L495 AbstractCegarLoop]: Abstraction has 5239 states and 7402 transitions. [2022-11-23 16:09:18,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:09:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5239 states and 7402 transitions. [2022-11-23 16:09:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 16:09:18,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:18,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:18,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 16:09:18,582 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:18,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1081406071, now seen corresponding path program 1 times [2022-11-23 16:09:18,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:18,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11388964] [2022-11-23 16:09:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 16:09:21,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:21,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11388964] [2022-11-23 16:09:21,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11388964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:21,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:21,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:09:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566368518] [2022-11-23 16:09:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:09:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:09:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:09:21,113 INFO L87 Difference]: Start difference. First operand 5239 states and 7402 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:09:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:23,179 INFO L93 Difference]: Finished difference Result 11906 states and 17109 transitions. [2022-11-23 16:09:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:09:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 89 [2022-11-23 16:09:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:23,243 INFO L225 Difference]: With dead ends: 11906 [2022-11-23 16:09:23,244 INFO L226 Difference]: Without dead ends: 6683 [2022-11-23 16:09:23,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:09:23,271 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 366 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2238 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:23,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2238 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 16:09:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6683 states. [2022-11-23 16:09:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6683 to 5293. [2022-11-23 16:09:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 3774 states have (on average 1.4024907260201378) internal successors, (5293), 3851 states have internal predecessors, (5293), 1091 states have call successors, (1091), 451 states have call predecessors, (1091), 427 states have return successors, (1081), 1026 states have call predecessors, (1081), 1075 states have call successors, (1081) [2022-11-23 16:09:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 7465 transitions. [2022-11-23 16:09:24,160 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 7465 transitions. Word has length 89 [2022-11-23 16:09:24,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:24,163 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 7465 transitions. [2022-11-23 16:09:24,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:09:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 7465 transitions. [2022-11-23 16:09:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 16:09:24,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:24,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:24,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:09:24,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash -278794882, now seen corresponding path program 1 times [2022-11-23 16:09:24,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:24,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708827040] [2022-11-23 16:09:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:24,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:09:28,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:28,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708827040] [2022-11-23 16:09:28,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708827040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:28,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828513803] [2022-11-23 16:09:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:28,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:28,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:28,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:28,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:09:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 13677 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:09:31,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:09:32,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:09:32,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828513803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:32,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:09:32,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-23 16:09:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315139160] [2022-11-23 16:09:32,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:32,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:09:32,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:09:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:09:32,044 INFO L87 Difference]: Start difference. First operand 5293 states and 7465 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 16:09:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:34,035 INFO L93 Difference]: Finished difference Result 10661 states and 15014 transitions. [2022-11-23 16:09:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:09:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 107 [2022-11-23 16:09:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:34,079 INFO L225 Difference]: With dead ends: 10661 [2022-11-23 16:09:34,080 INFO L226 Difference]: Without dead ends: 5318 [2022-11-23 16:09:34,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:09:34,104 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 615 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:34,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 2728 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 16:09:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2022-11-23 16:09:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 5210. [2022-11-23 16:09:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 3713 states have (on average 1.4026393751683275) internal successors, (5208), 3790 states have internal predecessors, (5208), 1080 states have call successors, (1080), 440 states have call predecessors, (1080), 416 states have return successors, (1070), 1015 states have call predecessors, (1070), 1064 states have call successors, (1070) [2022-11-23 16:09:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 7358 transitions. [2022-11-23 16:09:34,682 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 7358 transitions. Word has length 107 [2022-11-23 16:09:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:34,684 INFO L495 AbstractCegarLoop]: Abstraction has 5210 states and 7358 transitions. [2022-11-23 16:09:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 16:09:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 7358 transitions. [2022-11-23 16:09:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 16:09:34,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:34,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:34,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:34,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 16:09:34,905 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:34,906 INFO L85 PathProgramCache]: Analyzing trace with hash -613720317, now seen corresponding path program 1 times [2022-11-23 16:09:34,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:34,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295849552] [2022-11-23 16:09:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:34,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 16:09:39,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:39,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295849552] [2022-11-23 16:09:39,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295849552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:39,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16880021] [2022-11-23 16:09:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:39,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:39,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:09:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:41,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 13797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:09:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:42,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 16:09:42,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16880021] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:42,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:09:42,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 12 [2022-11-23 16:09:42,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471893041] [2022-11-23 16:09:42,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:42,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:09:42,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:09:42,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=69, Unknown=0, NotChecked=0, Total=132 [2022-11-23 16:09:42,608 INFO L87 Difference]: Start difference. First operand 5210 states and 7358 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 16:09:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:44,887 INFO L93 Difference]: Finished difference Result 14768 states and 21022 transitions. [2022-11-23 16:09:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:09:44,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2022-11-23 16:09:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:44,932 INFO L225 Difference]: With dead ends: 14768 [2022-11-23 16:09:44,932 INFO L226 Difference]: Without dead ends: 9574 [2022-11-23 16:09:44,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=81, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:09:44,953 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 1180 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:44,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 1972 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 16:09:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9574 states. [2022-11-23 16:09:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9574 to 8709. [2022-11-23 16:09:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8709 states, 6271 states have (on average 1.4154042417477277) internal successors, (8876), 6383 states have internal predecessors, (8876), 1750 states have call successors, (1750), 722 states have call predecessors, (1750), 687 states have return successors, (1745), 1663 states have call predecessors, (1745), 1735 states have call successors, (1745) [2022-11-23 16:09:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8709 states to 8709 states and 12371 transitions. [2022-11-23 16:09:45,927 INFO L78 Accepts]: Start accepts. Automaton has 8709 states and 12371 transitions. Word has length 115 [2022-11-23 16:09:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:45,928 INFO L495 AbstractCegarLoop]: Abstraction has 8709 states and 12371 transitions. [2022-11-23 16:09:45,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 16:09:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8709 states and 12371 transitions. [2022-11-23 16:09:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 16:09:45,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:45,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:45,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:46,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:46,149 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2064909880, now seen corresponding path program 1 times [2022-11-23 16:09:46,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:46,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832444060] [2022-11-23 16:09:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:46,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 16:09:49,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:49,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832444060] [2022-11-23 16:09:49,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832444060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:49,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:49,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:09:49,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738989066] [2022-11-23 16:09:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:49,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:09:49,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:09:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:09:49,213 INFO L87 Difference]: Start difference. First operand 8709 states and 12371 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 16:09:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:50,608 INFO L93 Difference]: Finished difference Result 17633 states and 25034 transitions. [2022-11-23 16:09:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:09:50,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 116 [2022-11-23 16:09:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:50,660 INFO L225 Difference]: With dead ends: 17633 [2022-11-23 16:09:50,660 INFO L226 Difference]: Without dead ends: 8927 [2022-11-23 16:09:50,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:09:50,699 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 124 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:50,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 2133 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:09:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2022-11-23 16:09:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 8841. [2022-11-23 16:09:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 6350 states have (on average 1.4121259842519684) internal successors, (8967), 6482 states have internal predecessors, (8967), 1769 states have call successors, (1769), 736 states have call predecessors, (1769), 721 states have return successors, (1819), 1682 states have call predecessors, (1819), 1754 states have call successors, (1819) [2022-11-23 16:09:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12555 transitions. [2022-11-23 16:09:51,770 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12555 transitions. Word has length 116 [2022-11-23 16:09:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:51,770 INFO L495 AbstractCegarLoop]: Abstraction has 8841 states and 12555 transitions. [2022-11-23 16:09:51,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 16:09:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12555 transitions. [2022-11-23 16:09:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:09:51,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:51,776 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:51,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 16:09:51,777 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1709078791, now seen corresponding path program 1 times [2022-11-23 16:09:51,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:51,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147255087] [2022-11-23 16:09:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 16:09:54,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:54,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147255087] [2022-11-23 16:09:54,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147255087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:54,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:54,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:09:54,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014146492] [2022-11-23 16:09:54,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:54,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:09:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:54,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:09:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:09:54,590 INFO L87 Difference]: Start difference. First operand 8841 states and 12555 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:09:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:56,367 INFO L93 Difference]: Finished difference Result 17694 states and 25120 transitions. [2022-11-23 16:09:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:09:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 130 [2022-11-23 16:09:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:56,400 INFO L225 Difference]: With dead ends: 17694 [2022-11-23 16:09:56,401 INFO L226 Difference]: Without dead ends: 8878 [2022-11-23 16:09:56,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:09:56,421 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 761 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:56,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1925 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 16:09:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8878 states. [2022-11-23 16:09:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8878 to 8843. [2022-11-23 16:09:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 6352 states have (on average 1.4028652392947103) internal successors, (8911), 6484 states have internal predecessors, (8911), 1769 states have call successors, (1769), 736 states have call predecessors, (1769), 721 states have return successors, (1819), 1682 states have call predecessors, (1819), 1754 states have call successors, (1819) [2022-11-23 16:09:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 12499 transitions. [2022-11-23 16:09:57,103 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 12499 transitions. Word has length 130 [2022-11-23 16:09:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:57,104 INFO L495 AbstractCegarLoop]: Abstraction has 8843 states and 12499 transitions. [2022-11-23 16:09:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:09:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 12499 transitions. [2022-11-23 16:09:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-23 16:09:57,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:57,109 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:57,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 16:09:57,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 897452846, now seen corresponding path program 1 times [2022-11-23 16:09:57,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:57,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115476102] [2022-11-23 16:09:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 16:10:00,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:00,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115476102] [2022-11-23 16:10:00,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115476102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:00,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936595280] [2022-11-23 16:10:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:00,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:00,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:00,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:10:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 13866 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:10:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 16:10:03,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-23 16:10:03,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936595280] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:03,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:10:03,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 10 [2022-11-23 16:10:03,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408257590] [2022-11-23 16:10:03,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:10:03,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:10:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:10:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:10:03,480 INFO L87 Difference]: Start difference. First operand 8843 states and 12499 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 16:10:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:05,288 INFO L93 Difference]: Finished difference Result 24602 states and 34908 transitions. [2022-11-23 16:10:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:10:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2022-11-23 16:10:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:05,363 INFO L225 Difference]: With dead ends: 24602 [2022-11-23 16:10:05,364 INFO L226 Difference]: Without dead ends: 15865 [2022-11-23 16:10:05,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:10:05,393 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 560 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:05,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1070 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 16:10:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15865 states. [2022-11-23 16:10:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15865 to 15810. [2022-11-23 16:10:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15810 states, 11448 states have (on average 1.4127358490566038) internal successors, (16173), 11667 states have internal predecessors, (16173), 3094 states have call successors, (3094), 1284 states have call predecessors, (3094), 1267 states have return successors, (3197), 2966 states have call predecessors, (3197), 3080 states have call successors, (3197) [2022-11-23 16:10:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 22464 transitions. [2022-11-23 16:10:06,701 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 22464 transitions. Word has length 131 [2022-11-23 16:10:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:06,702 INFO L495 AbstractCegarLoop]: Abstraction has 15810 states and 22464 transitions. [2022-11-23 16:10:06,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 16:10:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 22464 transitions. [2022-11-23 16:10:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-23 16:10:06,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:06,708 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:06,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:06,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 16:10:06,925 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash -658425648, now seen corresponding path program 1 times [2022-11-23 16:10:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:06,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982251726] [2022-11-23 16:10:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:06,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-23 16:10:10,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:10,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982251726] [2022-11-23 16:10:10,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982251726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:10,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464075762] [2022-11-23 16:10:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:10,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:10,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:10:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 13874 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:10:12,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 16:10:12,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 16:10:13,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464075762] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:13,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:10:13,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 10 [2022-11-23 16:10:13,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313431533] [2022-11-23 16:10:13,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:10:13,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:10:13,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:13,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:10:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:10:13,178 INFO L87 Difference]: Start difference. First operand 15810 states and 22464 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 16:10:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:15,376 INFO L93 Difference]: Finished difference Result 45408 states and 64692 transitions. [2022-11-23 16:10:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:10:15,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 135 [2022-11-23 16:10:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:15,522 INFO L225 Difference]: With dead ends: 45408 [2022-11-23 16:10:15,523 INFO L226 Difference]: Without dead ends: 29704 [2022-11-23 16:10:15,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:10:15,584 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 560 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:15,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1070 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:10:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29704 states. [2022-11-23 16:10:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29704 to 29633. [2022-11-23 16:10:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29633 states, 21576 states have (on average 1.4188450129773822) internal successors, (30613), 21970 states have internal predecessors, (30613), 5715 states have call successors, (5715), 2356 states have call predecessors, (5715), 2341 states have return successors, (5923), 5510 states have call predecessors, (5923), 5702 states have call successors, (5923) [2022-11-23 16:10:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29633 states to 29633 states and 42251 transitions. [2022-11-23 16:10:18,007 INFO L78 Accepts]: Start accepts. Automaton has 29633 states and 42251 transitions. Word has length 135 [2022-11-23 16:10:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:18,008 INFO L495 AbstractCegarLoop]: Abstraction has 29633 states and 42251 transitions. [2022-11-23 16:10:18,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 16:10:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 29633 states and 42251 transitions. [2022-11-23 16:10:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 16:10:18,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:18,020 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:18,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:10:18,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash 27394684, now seen corresponding path program 1 times [2022-11-23 16:10:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200613521] [2022-11-23 16:10:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:18,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 16:10:23,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200613521] [2022-11-23 16:10:23,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200613521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084506299] [2022-11-23 16:10:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:23,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:23,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:23,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78ae04d2-38b5-41e4-af21-a8a90ddef75f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:10:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 13896 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:10:27,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 16:10:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 16:10:27,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084506299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824725320] [2022-11-23 16:10:27,905 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2022-11-23 16:10:27,905 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:27,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:27,917 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:27,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs