./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/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_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/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_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/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 03b59b42cc833f5b28fc5dc7cc6711355c533ad94229ba44874c6d4d186d9dcb --- 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 16:07:29,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:07:29,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:07:29,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:07:29,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:07:29,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:07:29,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:07:29,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:07:29,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:07:29,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:07:29,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:07:29,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:07:29,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:07:29,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:07:29,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:07:29,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:07:29,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:07:29,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:07:29,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:07:29,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:07:29,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:07:29,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:07:29,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:07:29,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:07:29,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:07:29,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:07:29,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:07:29,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:07:29,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:07:29,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:07:29,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:07:29,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:07:29,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:07:29,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:07:29,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:07:29,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:07:29,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:07:29,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:07:29,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:07:29,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:07:29,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:07:29,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 16:07:29,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:07:29,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:07:29,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:07:29,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:07:29,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:07:29,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:07:29,620 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:07:29,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:07:29,621 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:07:29,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:07:29,622 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:07:29,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:07:29,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:07:29,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:07:29,623 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:07:29,623 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:07:29,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:07:29,624 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:07:29,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:07:29,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:07:29,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:07:29,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:07:29,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:07:29,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:07:29,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:07:29,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:07:29,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:07:29,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:07:29,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:07:29,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:07:29,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:07:29,627 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:07:29,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:07:29,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:07:29,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:07:29,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:07:29,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:07:29,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:07:29,629 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_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b59b42cc833f5b28fc5dc7cc6711355c533ad94229ba44874c6d4d186d9dcb [2022-11-23 16:07:29,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:07:29,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:07:29,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:07:29,938 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:07:29,939 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:07:29,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2022-11-23 16:07:32,958 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:07:33,418 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:07:33,419 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2022-11-23 16:07:33,456 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/data/31104d730/3c5fd355e8c3449d9d6de6be94f468a6/FLAG5e7fe1b11 [2022-11-23 16:07:33,477 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/data/31104d730/3c5fd355e8c3449d9d6de6be94f468a6 [2022-11-23 16:07:33,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:07:33,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:07:33,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:07:33,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:07:33,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:07:33,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:07:33" (1/1) ... [2022-11-23 16:07:33,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ab5c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:33, skipping insertion in model container [2022-11-23 16:07:33,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:07:33" (1/1) ... [2022-11-23 16:07:33,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:07:33,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:07:34,982 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_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i[202861,202874] [2022-11-23 16:07:35,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:07:35,036 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:07:35,374 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_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i[202861,202874] [2022-11-23 16:07:35,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:07:35,457 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:07:35,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35 WrapperNode [2022-11-23 16:07:35,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:07:35,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:07:35,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:07:35,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:07:35,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,658 INFO L138 Inliner]: procedures = 157, calls = 812, calls flagged for inlining = 80, calls inlined = 79, statements flattened = 2777 [2022-11-23 16:07:35,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:07:35,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:07:35,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:07:35,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:07:35,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:07:35,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:07:35,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:07:35,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:07:35,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (1/1) ... [2022-11-23 16:07:35,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:07:35,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:35,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:07:35,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:07:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 16:07:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-23 16:07:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 16:07:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 16:07:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:07:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 16:07:36,027 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 16:07:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-23 16:07:36,027 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-23 16:07:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure slhc_free [2022-11-23 16:07:36,027 INFO L138 BoogieDeclarations]: Found implementation of procedure slhc_free [2022-11-23 16:07:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 16:07:36,028 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 16:07:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-23 16:07:36,028 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-23 16:07:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 16:07:36,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 16:07:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 16:07:36,029 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 16:07:36,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-11-23 16:07:36,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-11-23 16:07:36,029 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-11-23 16:07:36,029 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-11-23 16:07:36,029 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 16:07:36,030 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 16:07:36,030 INFO L130 BoogieDeclarations]: Found specification of procedure sl_free_bufs [2022-11-23 16:07:36,031 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_free_bufs [2022-11-23 16:07:36,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:07:36,032 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-23 16:07:36,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-23 16:07:36,032 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2022-11-23 16:07:36,032 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2022-11-23 16:07:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 16:07:36,033 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 16:07:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 16:07:36,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 16:07:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 16:07:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 16:07:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-11-23 16:07:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-11-23 16:07:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 16:07:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure sl_bump [2022-11-23 16:07:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_bump [2022-11-23 16:07:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure slip_ioctl [2022-11-23 16:07:36,035 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_ioctl [2022-11-23 16:07:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:07:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-23 16:07:36,035 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-23 16:07:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure slip_close [2022-11-23 16:07:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_close [2022-11-23 16:07:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:07:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 16:07:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 16:07:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-23 16:07:36,037 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-23 16:07:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 16:07:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-23 16:07:36,038 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-23 16:07:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 16:07:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 16:07:36,039 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-23 16:07:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-23 16:07:36,039 INFO L130 BoogieDeclarations]: Found specification of procedure sl_ioctl [2022-11-23 16:07:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_ioctl [2022-11-23 16:07:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hangup [2022-11-23 16:07:36,040 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hangup [2022-11-23 16:07:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:07:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-23 16:07:36,040 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-23 16:07:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 16:07:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-23 16:07:36,041 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-23 16:07:36,041 INFO L130 BoogieDeclarations]: Found specification of procedure tty_devnum [2022-11-23 16:07:36,041 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_devnum [2022-11-23 16:07:36,041 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-23 16:07:36,042 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-23 16:07:36,042 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 16:07:36,042 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 16:07:36,043 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 16:07:36,043 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 16:07:36,043 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 16:07:36,043 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 16:07:36,044 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 16:07:36,044 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 16:07:36,044 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 16:07:36,045 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 16:07:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 16:07:36,045 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 16:07:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:07:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-23 16:07:36,045 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-23 16:07:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-23 16:07:36,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-23 16:07:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-11-23 16:07:36,047 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-11-23 16:07:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-23 16:07:36,047 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-23 16:07:36,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 16:07:36,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:07:36,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:07:36,048 INFO L130 BoogieDeclarations]: Found specification of procedure sl_unlock [2022-11-23 16:07:36,048 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_unlock [2022-11-23 16:07:36,049 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-23 16:07:36,049 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-23 16:07:36,669 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:07:36,671 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:07:39,431 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:07:40,464 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:07:40,465 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 16:07:40,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:07:40 BoogieIcfgContainer [2022-11-23 16:07:40,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:07:40,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:07:40,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:07:40,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:07:40,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:07:33" (1/3) ... [2022-11-23 16:07:40,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cbc074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:07:40, skipping insertion in model container [2022-11-23 16:07:40,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:35" (2/3) ... [2022-11-23 16:07:40,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cbc074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:07:40, skipping insertion in model container [2022-11-23 16:07:40,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:07:40" (3/3) ... [2022-11-23 16:07:40,492 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2022-11-23 16:07:40,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:07:40,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:07:40,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:07:40,611 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;@5897bf0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:07:40,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:07:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 666 states, 414 states have (on average 1.391304347826087) internal successors, (576), 441 states have internal predecessors, (576), 207 states have call successors, (207), 43 states have call predecessors, (207), 43 states have return successors, (207), 205 states have call predecessors, (207), 207 states have call successors, (207) [2022-11-23 16:07:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 16:07:40,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:40,649 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] [2022-11-23 16:07:40,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1292040135, now seen corresponding path program 1 times [2022-11-23 16:07:40,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:40,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325010670] [2022-11-23 16:07:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:40,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:41,327 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 16:07:41,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325010670] [2022-11-23 16:07:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325010670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:41,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:41,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:07:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096626367] [2022-11-23 16:07:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:41,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:07:41,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:07:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:41,369 INFO L87 Difference]: Start difference. First operand has 666 states, 414 states have (on average 1.391304347826087) internal successors, (576), 441 states have internal predecessors, (576), 207 states have call successors, (207), 43 states have call predecessors, (207), 43 states have return successors, (207), 205 states have call predecessors, (207), 207 states have call successors, (207) Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 16:07:43,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:44,453 INFO L93 Difference]: Finished difference Result 1323 states and 1964 transitions. [2022-11-23 16:07:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:07:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2022-11-23 16:07:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:44,479 INFO L225 Difference]: With dead ends: 1323 [2022-11-23 16:07:44,479 INFO L226 Difference]: Without dead ends: 638 [2022-11-23 16:07:44,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:07:44,490 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 5 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:44,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2608 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 355 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 16:07:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-23 16:07:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2022-11-23 16:07:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 395 states have (on average 1.369620253164557) internal successors, (541), 419 states have internal predecessors, (541), 199 states have call successors, (199), 43 states have call predecessors, (199), 43 states have return successors, (199), 197 states have call predecessors, (199), 199 states have call successors, (199) [2022-11-23 16:07:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 939 transitions. [2022-11-23 16:07:44,615 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 939 transitions. Word has length 45 [2022-11-23 16:07:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:44,616 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 939 transitions. [2022-11-23 16:07:44,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 16:07:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 939 transitions. [2022-11-23 16:07:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 16:07:44,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:44,620 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] [2022-11-23 16:07:44,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:07:44,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash -473691779, now seen corresponding path program 1 times [2022-11-23 16:07:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453023863] [2022-11-23 16:07:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:44,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:44,949 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 16:07:44,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453023863] [2022-11-23 16:07:44,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453023863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:44,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:44,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:07:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069370147] [2022-11-23 16:07:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:44,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:07:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:44,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:07:44,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:44,961 INFO L87 Difference]: Start difference. First operand 638 states and 939 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 16:07:47,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:48,443 INFO L93 Difference]: Finished difference Result 1019 states and 1559 transitions. [2022-11-23 16:07:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:07:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 47 [2022-11-23 16:07:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:48,451 INFO L225 Difference]: With dead ends: 1019 [2022-11-23 16:07:48,451 INFO L226 Difference]: Without dead ends: 1017 [2022-11-23 16:07:48,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 16:07:48,453 INFO L413 NwaCegarLoop]: 1390 mSDtfsCounter, 599 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 3401 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:48,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 3401 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 16:07:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-11-23 16:07:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 640. [2022-11-23 16:07:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 397 states have (on average 1.3677581863979849) internal successors, (543), 421 states have internal predecessors, (543), 199 states have call successors, (199), 43 states have call predecessors, (199), 43 states have return successors, (199), 197 states have call predecessors, (199), 199 states have call successors, (199) [2022-11-23 16:07:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 941 transitions. [2022-11-23 16:07:48,506 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 941 transitions. Word has length 47 [2022-11-23 16:07:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:48,506 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 941 transitions. [2022-11-23 16:07:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 16:07:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 941 transitions. [2022-11-23 16:07:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 16:07:48,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:48,510 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 16:07:48,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:07:48,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:48,511 INFO L85 PathProgramCache]: Analyzing trace with hash 689080855, now seen corresponding path program 1 times [2022-11-23 16:07:48,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:48,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210792478] [2022-11-23 16:07:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:48,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:48,816 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 16:07:48,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210792478] [2022-11-23 16:07:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210792478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:48,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:48,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:07:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11697799] [2022-11-23 16:07:48,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:48,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:07:48,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:48,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:07:48,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:48,829 INFO L87 Difference]: Start difference. First operand 640 states and 941 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:07:51,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:54,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:55,158 INFO L93 Difference]: Finished difference Result 1648 states and 2484 transitions. [2022-11-23 16:07:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:07:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2022-11-23 16:07:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:55,165 INFO L225 Difference]: With dead ends: 1648 [2022-11-23 16:07:55,165 INFO L226 Difference]: Without dead ends: 1021 [2022-11-23 16:07:55,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:55,169 INFO L413 NwaCegarLoop]: 1164 mSDtfsCounter, 1460 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:55,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 1590 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 905 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 16:07:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-11-23 16:07:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 641. [2022-11-23 16:07:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 398 states have (on average 1.3668341708542713) internal successors, (544), 422 states have internal predecessors, (544), 199 states have call successors, (199), 43 states have call predecessors, (199), 43 states have return successors, (199), 197 states have call predecessors, (199), 199 states have call successors, (199) [2022-11-23 16:07:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 942 transitions. [2022-11-23 16:07:55,222 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 942 transitions. Word has length 55 [2022-11-23 16:07:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:55,222 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 942 transitions. [2022-11-23 16:07:55,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:07:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 942 transitions. [2022-11-23 16:07:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 16:07:55,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:55,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:55,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:07:55,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:55,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash 478691755, now seen corresponding path program 1 times [2022-11-23 16:07:55,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:55,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258828854] [2022-11-23 16:07:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:55,487 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 16:07:55,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:55,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258828854] [2022-11-23 16:07:55,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258828854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:55,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:55,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:07:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369216368] [2022-11-23 16:07:55,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:07:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:07:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:07:55,490 INFO L87 Difference]: Start difference. First operand 641 states and 942 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:57,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:59,637 INFO L93 Difference]: Finished difference Result 1634 states and 2554 transitions. [2022-11-23 16:07:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:07:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2022-11-23 16:07:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:59,648 INFO L225 Difference]: With dead ends: 1634 [2022-11-23 16:07:59,648 INFO L226 Difference]: Without dead ends: 1632 [2022-11-23 16:07:59,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:07:59,651 INFO L413 NwaCegarLoop]: 1725 mSDtfsCounter, 1533 mSDsluCounter, 4070 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 588 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 5795 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:59,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1674 Valid, 5795 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 651 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 16:07:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-23 16:07:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 643. [2022-11-23 16:07:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 399 states have (on average 1.3659147869674186) internal successors, (545), 422 states have internal predecessors, (545), 200 states have call successors, (200), 43 states have call predecessors, (200), 43 states have return successors, (200), 198 states have call predecessors, (200), 200 states have call successors, (200) [2022-11-23 16:07:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 945 transitions. [2022-11-23 16:07:59,780 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 945 transitions. Word has length 56 [2022-11-23 16:07:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:59,781 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 945 transitions. [2022-11-23 16:07:59,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 945 transitions. [2022-11-23 16:07:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 16:07:59,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:59,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:59,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:07:59,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:59,787 INFO L85 PathProgramCache]: Analyzing trace with hash -140037774, now seen corresponding path program 1 times [2022-11-23 16:07:59,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:59,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808765522] [2022-11-23 16:07:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:59,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:08:00,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808765522] [2022-11-23 16:08:00,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808765522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:00,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:00,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:08:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729789333] [2022-11-23 16:08:00,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:08:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:00,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:08:00,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:00,045 INFO L87 Difference]: Start difference. First operand 643 states and 945 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 16:08:02,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:02,748 INFO L93 Difference]: Finished difference Result 1285 states and 1882 transitions. [2022-11-23 16:08:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:02,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 80 [2022-11-23 16:08:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:02,755 INFO L225 Difference]: With dead ends: 1285 [2022-11-23 16:08:02,755 INFO L226 Difference]: Without dead ends: 655 [2022-11-23 16:08:02,757 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 16:08:02,758 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 900 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:02,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 836 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 16:08:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-23 16:08:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2022-11-23 16:08:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 405 states have (on average 1.3580246913580247) internal successors, (550), 428 states have internal predecessors, (550), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2022-11-23 16:08:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 954 transitions. [2022-11-23 16:08:02,868 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 954 transitions. Word has length 80 [2022-11-23 16:08:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:02,868 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 954 transitions. [2022-11-23 16:08:02,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 16:08:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 954 transitions. [2022-11-23 16:08:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 16:08:02,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:02,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:08:02,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1386259848, now seen corresponding path program 1 times [2022-11-23 16:08:02,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:02,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624592061] [2022-11-23 16:08:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:08:03,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624592061] [2022-11-23 16:08:03,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624592061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:03,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:03,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:08:03,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862493049] [2022-11-23 16:08:03,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:03,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:08:03,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:03,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:08:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:08:03,173 INFO L87 Difference]: Start difference. First operand 655 states and 954 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 16:08:06,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:08,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:11,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:14,213 INFO L93 Difference]: Finished difference Result 2431 states and 3741 transitions. [2022-11-23 16:08:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:08:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 82 [2022-11-23 16:08:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:14,223 INFO L225 Difference]: With dead ends: 2431 [2022-11-23 16:08:14,224 INFO L226 Difference]: Without dead ends: 1801 [2022-11-23 16:08:14,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:08:14,227 INFO L413 NwaCegarLoop]: 1541 mSDtfsCounter, 2498 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 470 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:14,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2636 Valid, 3522 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1821 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 16:08:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-11-23 16:08:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 658. [2022-11-23 16:08:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 408 states have (on average 1.357843137254902) internal successors, (554), 431 states have internal predecessors, (554), 202 states have call successors, (202), 47 states have call predecessors, (202), 47 states have return successors, (202), 200 states have call predecessors, (202), 202 states have call successors, (202) [2022-11-23 16:08:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 958 transitions. [2022-11-23 16:08:14,346 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 958 transitions. Word has length 82 [2022-11-23 16:08:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:14,346 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 958 transitions. [2022-11-23 16:08:14,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 16:08:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 958 transitions. [2022-11-23 16:08:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 16:08:14,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:14,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:14,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:08:14,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2107057027, now seen corresponding path program 1 times [2022-11-23 16:08:14,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387913271] [2022-11-23 16:08:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:08:14,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387913271] [2022-11-23 16:08:14,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387913271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:08:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252190462] [2022-11-23 16:08:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:08:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:08:14,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:08:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:08:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:08:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:08:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:08:15,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:08:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:08:15,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252190462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:08:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537282352] [2022-11-23 16:08:15,808 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-11-23 16:08:15,808 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:08:15,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:08:15,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:08:15,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:08:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:16,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:16,412 INFO L217 Elim1Store]: Index analysis took 116 ms [2022-11-23 16:08:18,554 INFO L321 Elim1Store]: treesize reduction 1134, result has 27.6 percent of original size [2022-11-23 16:08:18,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 29 select indices, 29 select index equivalence classes, 415 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 30 case distinctions, treesize of input 158 treesize of output 530 [2022-11-23 16:08:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:19,216 INFO L217 Elim1Store]: Index analysis took 238 ms [2022-11-23 16:08:23,217 INFO L321 Elim1Store]: treesize reduction 1776, result has 21.5 percent of original size [2022-11-23 16:08:23,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 33 select indices, 33 select index equivalence classes, 441 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 119 case distinctions, treesize of input 190 treesize of output 613 [2022-11-23 16:08:24,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:08:25,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 16:08:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:25,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 32 select indices, 32 select index equivalence classes, 499 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 97 [2022-11-23 16:08:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:25,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 33 select indices, 33 select index equivalence classes, 528 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 100 [2022-11-23 16:08:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:27,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 32 select indices, 32 select index equivalence classes, 499 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 97 [2022-11-23 16:08:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:27,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:27,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 33 select indices, 33 select index equivalence classes, 528 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 100 [2022-11-23 16:08:58,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:08:58,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:09:09,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:09:09,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:09:13,858 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-23 16:09:13,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2022-11-23 16:09:13,982 INFO L321 Elim1Store]: treesize reduction 141, result has 10.2 percent of original size [2022-11-23 16:09:13,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 60 treesize of output 57 [2022-11-23 16:09:16,361 INFO L321 Elim1Store]: treesize reduction 93, result has 40.8 percent of original size [2022-11-23 16:09:16,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 690 [2022-11-23 16:09:38,634 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:09:38,639 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:09:55,300 INFO L197 IcfgInterpreter]: Interpreting procedure dev_alloc_skb with input of size 772 for LOIs [2022-11-23 16:09:58,952 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 49 for LOIs [2022-11-23 16:09:58,960 INFO L197 IcfgInterpreter]: Interpreting procedure kmalloc with input of size 478 for LOIs [2022-11-23 16:10:02,452 INFO L197 IcfgInterpreter]: Interpreting procedure tty_devnum with input of size 99 for LOIs [2022-11-23 16:10:02,463 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 56 for LOIs [2022-11-23 16:10:02,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:10:02,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 16:10:02,547 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:10,034 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 770 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:10:36,428 WARN L233 SmtUtils]: Spent 18.52s on a formula simplification. DAG size of input: 691 DAG size of output: 651 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:10:55,064 WARN L233 SmtUtils]: Spent 18.35s on a formula simplification. DAG size of input: 693 DAG size of output: 656 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:11:14,720 WARN L233 SmtUtils]: Spent 18.86s on a formula simplification. DAG size of input: 708 DAG size of output: 661 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:11:59,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1537282352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:59,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:11:59,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [5, 4, 5] total 59 [2022-11-23 16:11:59,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446887170] [2022-11-23 16:11:59,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:59,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 16:11:59,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 16:11:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2978, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 16:11:59,228 INFO L87 Difference]: Start difference. First operand 658 states and 958 transitions. Second operand has 51 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 41 states have internal predecessors, (59), 8 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-23 16:13:03,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:05,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:08,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:09,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:13,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:15,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:17,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:13:21,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:24,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:30,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:32,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:39,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:43,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:45,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:49,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:53,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:56,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:13:57,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:14:42,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:15:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:19,608 INFO L93 Difference]: Finished difference Result 2758 states and 4152 transitions. [2022-11-23 16:15:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-23 16:15:19,609 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 41 states have internal predecessors, (59), 8 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 84 [2022-11-23 16:15:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:19,619 INFO L225 Difference]: With dead ends: 2758 [2022-11-23 16:15:19,619 INFO L226 Difference]: Without dead ends: 2125 [2022-11-23 16:15:19,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 136.1s TimeCoverageRelationStatistics Valid=686, Invalid=4284, Unknown=0, NotChecked=0, Total=4970 [2022-11-23 16:15:19,624 INFO L413 NwaCegarLoop]: 1222 mSDtfsCounter, 2095 mSDsluCounter, 16779 mSDsCounter, 0 mSdLazyCounter, 26986 mSolverCounterSat, 371 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 18001 SdHoareTripleChecker+Invalid, 27368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 26986 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:19,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2341 Valid, 18001 Invalid, 27368 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [371 Valid, 26986 Invalid, 11 Unknown, 0 Unchecked, 179.4s Time] [2022-11-23 16:15:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-11-23 16:15:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1801. [2022-11-23 16:15:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1138 states have (on average 1.384007029876977) internal successors, (1575), 1207 states have internal predecessors, (1575), 570 states have call successors, (570), 92 states have call predecessors, (570), 92 states have return successors, (570), 563 states have call predecessors, (570), 570 states have call successors, (570) [2022-11-23 16:15:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2715 transitions. [2022-11-23 16:15:20,146 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2715 transitions. Word has length 84 [2022-11-23 16:15:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:20,146 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 2715 transitions. [2022-11-23 16:15:20,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 41 states have internal predecessors, (59), 8 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-23 16:15:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2715 transitions. [2022-11-23 16:15:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 16:15:20,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:20,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:20,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 16:15:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:20,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:15:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash 270422275, now seen corresponding path program 1 times [2022-11-23 16:15:20,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:15:20,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259808401] [2022-11-23 16:15:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:15:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:15:20,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:15:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259808401] [2022-11-23 16:15:20,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259808401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:15:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318450344] [2022-11-23 16:15:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:20,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:15:20,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:15:20,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:15:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:15:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:15:21,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:15:21,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318450344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:15:21,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:15:21,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-23 16:15:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964761242] [2022-11-23 16:15:21,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:15:21,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:15:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:15:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:15:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:15:21,356 INFO L87 Difference]: Start difference. First operand 1801 states and 2715 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 16:15:23,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:15:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:24,794 INFO L93 Difference]: Finished difference Result 3065 states and 4574 transitions. [2022-11-23 16:15:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:15:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 87 [2022-11-23 16:15:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:24,806 INFO L225 Difference]: With dead ends: 3065 [2022-11-23 16:15:24,806 INFO L226 Difference]: Without dead ends: 1554 [2022-11-23 16:15:24,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:15:24,812 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 3 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:24,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3300 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 449 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 16:15:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-23 16:15:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1554. [2022-11-23 16:15:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 977 states have (on average 1.375639713408393) internal successors, (1344), 1034 states have internal predecessors, (1344), 484 states have call successors, (484), 92 states have call predecessors, (484), 92 states have return successors, (484), 478 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-23 16:15:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2312 transitions. [2022-11-23 16:15:25,206 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2312 transitions. Word has length 87 [2022-11-23 16:15:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:25,206 INFO L495 AbstractCegarLoop]: Abstraction has 1554 states and 2312 transitions. [2022-11-23 16:15:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 16:15:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2312 transitions. [2022-11-23 16:15:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 16:15:25,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:25,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:25,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 16:15:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:25,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:15:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash 265879187, now seen corresponding path program 1 times [2022-11-23 16:15:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:15:25,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304161289] [2022-11-23 16:15:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:25,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:15:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:15:25,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:15:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304161289] [2022-11-23 16:15:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304161289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:15:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107134742] [2022-11-23 16:15:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:25,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:15:25,787 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:15:25,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca0d6b8-ccc7-4e63-a2b7-f7794b1743dd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:15:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:15:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:15:26,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:15:26,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107134742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:26,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946599005] [2022-11-23 16:15:26,609 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-11-23 16:15:26,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:15:26,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:15:26,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:15:26,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:15:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:27,005 INFO L217 Elim1Store]: Index analysis took 103 ms [2022-11-23 16:15:29,110 INFO L321 Elim1Store]: treesize reduction 1134, result has 27.6 percent of original size [2022-11-23 16:15:29,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 29 select indices, 29 select index equivalence classes, 415 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 30 case distinctions, treesize of input 158 treesize of output 530 [2022-11-23 16:15:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:29,713 INFO L217 Elim1Store]: Index analysis took 379 ms [2022-11-23 16:15:33,791 INFO L321 Elim1Store]: treesize reduction 1776, result has 21.5 percent of original size [2022-11-23 16:15:33,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 33 select indices, 33 select index equivalence classes, 441 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 119 case distinctions, treesize of input 190 treesize of output 613 [2022-11-23 16:15:34,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:15:34,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 16:15:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:35,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 32 select indices, 32 select index equivalence classes, 499 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 97 [2022-11-23 16:15:35,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:35,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:35,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:35,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 33 select indices, 33 select index equivalence classes, 528 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 100 [2022-11-23 16:15:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:36,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:36,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 33 select indices, 33 select index equivalence classes, 528 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 100 [2022-11-23 16:15:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:37,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:37,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 32 select indices, 32 select index equivalence classes, 499 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 97 [2022-11-23 16:16:07,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:16:07,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:16:17,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:16:17,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 16:18:14,589 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-23 16:18:14,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2022-11-23 16:18:14,699 INFO L321 Elim1Store]: treesize reduction 141, result has 10.2 percent of original size [2022-11-23 16:18:14,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 60 treesize of output 57 [2022-11-23 16:18:15,671 INFO L321 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2022-11-23 16:18:15,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 21 [2022-11-23 16:18:15,934 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:18:15,936 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:18:15,942 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:18:43,084 INFO L197 IcfgInterpreter]: Interpreting procedure dev_alloc_skb with input of size 772 for LOIs [2022-11-23 16:18:48,897 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 26 for LOIs [2022-11-23 16:18:48,899 INFO L197 IcfgInterpreter]: Interpreting procedure kmalloc with input of size 478 for LOIs [2022-11-23 16:18:52,169 INFO L197 IcfgInterpreter]: Interpreting procedure tty_devnum with input of size 51 for LOIs [2022-11-23 16:18:52,174 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 56 for LOIs [2022-11-23 16:18:52,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:18:52,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 16:18:52,255 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_priv with input of size 27 for LOIs [2022-11-23 16:18:52,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:18:59,751 WARN L233 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 770 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:19:29,120 WARN L233 SmtUtils]: Spent 23.13s on a formula simplification. DAG size of input: 827 DAG size of output: 803 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:19:52,560 WARN L233 SmtUtils]: Spent 23.17s on a formula simplification. DAG size of input: 827 DAG size of output: 803 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:20:11,405 WARN L233 SmtUtils]: Spent 18.56s on a formula simplification. DAG size of input: 690 DAG size of output: 650 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:20:30,193 WARN L233 SmtUtils]: Spent 18.48s on a formula simplification. DAG size of input: 692 DAG size of output: 650 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:20:49,982 WARN L233 SmtUtils]: Spent 18.98s on a formula simplification. DAG size of input: 707 DAG size of output: 662 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:21:19,301 WARN L233 SmtUtils]: Spent 20.78s on a formula simplification. DAG size of input: 713 DAG size of output: 655 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:21:40,724 WARN L233 SmtUtils]: Spent 20.93s on a formula simplification. DAG size of input: 718 DAG size of output: 664 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)