./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P --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 32bit --witnessprinter.graph.data.programhash cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:59:36,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:59:36,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:59:36,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:59:36,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:59:36,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:59:36,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:59:36,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:59:36,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:59:36,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:59:36,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:59:36,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:59:36,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:59:36,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:59:36,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:59:36,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:59:36,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:59:36,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:59:36,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:59:36,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:59:36,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:59:36,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:59:36,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:59:36,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:59:36,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:59:36,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:59:36,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:59:36,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:59:36,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:59:36,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:59:36,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:59:36,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:59:36,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:59:36,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:59:36,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:59:36,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:59:36,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:59:36,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:59:36,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:59:36,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:59:36,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:59:36,654 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:59:36,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:59:36,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:59:36,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:59:36,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:59:36,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:59:36,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:59:36,724 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:59:36,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:59:36,725 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:59:36,725 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:59:36,727 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:59:36,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:59:36,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:59:36,728 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:59:36,728 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:59:36,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:59:36,729 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:59:36,729 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:59:36,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:59:36,731 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:59:36,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:59:36,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:59:36,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:59:36,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:59:36,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:59:36,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:59:36,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:59:36,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:59:36,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:59:36,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:59:36,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:59:36,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:59:36,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:59:36,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:59:36,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:59:36,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:59:36,739 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:59:36,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:59:36,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:59:36,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:59:36,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:59:36,740 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 [2021-11-20 23:59:37,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:59:37,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:59:37,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:59:37,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:59:37,152 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:59:37,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-11-20 23:59:37,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/c00708f6e/c97eead0c78a45b3876081aa210e76c0/FLAGf0c342586 [2021-11-20 23:59:37,963 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:59:37,964 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-11-20 23:59:38,006 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/c00708f6e/c97eead0c78a45b3876081aa210e76c0/FLAGf0c342586 [2021-11-20 23:59:38,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/c00708f6e/c97eead0c78a45b3876081aa210e76c0 [2021-11-20 23:59:38,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:59:38,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:59:38,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:59:38,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:59:38,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:59:38,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:59:38" (1/1) ... [2021-11-20 23:59:38,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167476a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:38, skipping insertion in model container [2021-11-20 23:59:38,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:59:38" (1/1) ... [2021-11-20 23:59:38,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:59:38,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:59:38,824 WARN L230 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_69245159-2946-466b-bb5c-55c499c68b75/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c[65397,65410] [2021-11-20 23:59:38,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:59:38,853 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:59:39,030 WARN L230 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_69245159-2946-466b-bb5c-55c499c68b75/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c[65397,65410] [2021-11-20 23:59:39,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:59:39,062 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:59:39,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39 WrapperNode [2021-11-20 23:59:39,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:59:39,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:59:39,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:59:39,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:59:39,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,191 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-11-20 23:59:39,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:59:39,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:59:39,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:59:39,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:59:39,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:59:39,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:59:39,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:59:39,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:59:39,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (1/1) ... [2021-11-20 23:59:39,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:59:39,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:39,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:59:39,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:59:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:59:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:59:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:59:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:59:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:59:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:59:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:59:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:59:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:59:39,640 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:59:39,642 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:59:39,665 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:59:42,923 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-20 23:59:42,924 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-20 23:59:42,924 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:59:43,403 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:59:43,404 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:59:43,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:59:43 BoogieIcfgContainer [2021-11-20 23:59:43,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:59:43,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:59:43,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:59:43,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:59:43,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:59:38" (1/3) ... [2021-11-20 23:59:43,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333afdfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:59:43, skipping insertion in model container [2021-11-20 23:59:43,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:39" (2/3) ... [2021-11-20 23:59:43,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333afdfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:59:43, skipping insertion in model container [2021-11-20 23:59:43,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:59:43" (3/3) ... [2021-11-20 23:59:43,418 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.02.i.cil-1.c [2021-11-20 23:59:43,426 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:59:43,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:59:43,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:59:43,518 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:59:43,519 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:59:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:59:43,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:43,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:43,575 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1014135938, now seen corresponding path program 1 times [2021-11-20 23:59:43,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:43,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461953881] [2021-11-20 23:59:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:43,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:59:44,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:44,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461953881] [2021-11-20 23:59:44,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461953881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:44,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:44,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:59:44,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887711608] [2021-11-20 23:59:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:44,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:59:44,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:59:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:59:44,227 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:46,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:47,494 INFO L93 Difference]: Finished difference Result 173 states and 297 transitions. [2021-11-20 23:59:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:59:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:59:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:47,505 INFO L225 Difference]: With dead ends: 173 [2021-11-20 23:59:47,505 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 23:59:47,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:59:47,519 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:47,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 332 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 23:59:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 23:59:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-20 23:59:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 84 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2021-11-20 23:59:47,579 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 19 [2021-11-20 23:59:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:47,580 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2021-11-20 23:59:47,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2021-11-20 23:59:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 23:59:47,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:47,583 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:47,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:59:47,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1418718244, now seen corresponding path program 1 times [2021-11-20 23:59:47,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:47,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893669811] [2021-11-20 23:59:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:47,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:59:47,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:47,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893669811] [2021-11-20 23:59:47,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893669811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:47,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:47,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:59:47,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5798054] [2021-11-20 23:59:47,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:47,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:59:47,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:59:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:59:47,780 INFO L87 Difference]: Start difference. First operand 85 states and 122 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:49,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:50,532 INFO L93 Difference]: Finished difference Result 166 states and 240 transitions. [2021-11-20 23:59:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:59:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 23:59:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:50,536 INFO L225 Difference]: With dead ends: 166 [2021-11-20 23:59:50,536 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 23:59:50,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:59:50,539 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 87 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:50,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 205 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:59:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 23:59:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-11-20 23:59:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.462962962962963) internal successors, (237), 162 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2021-11-20 23:59:50,583 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 29 [2021-11-20 23:59:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:50,584 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2021-11-20 23:59:50,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2021-11-20 23:59:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:59:50,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:50,587 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:50,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:59:50,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1293024616, now seen corresponding path program 1 times [2021-11-20 23:59:50,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:50,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475464922] [2021-11-20 23:59:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:50,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:59:50,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:50,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475464922] [2021-11-20 23:59:50,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475464922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:50,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:50,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:59:50,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600777058] [2021-11-20 23:59:50,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:50,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:59:50,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:59:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:59:50,746 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:52,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:53,380 INFO L93 Difference]: Finished difference Result 272 states and 395 transitions. [2021-11-20 23:59:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:59:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 23:59:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:53,384 INFO L225 Difference]: With dead ends: 272 [2021-11-20 23:59:53,385 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 23:59:53,389 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:59:53,391 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:53,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 298 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 23:59:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 23:59:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-20 23:59:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 178 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 263 transitions. [2021-11-20 23:59:53,425 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 263 transitions. Word has length 41 [2021-11-20 23:59:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:53,425 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 263 transitions. [2021-11-20 23:59:53,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 263 transitions. [2021-11-20 23:59:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:59:53,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:53,435 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:53,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:59:53,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1367126342, now seen corresponding path program 2 times [2021-11-20 23:59:53,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:53,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841505276] [2021-11-20 23:59:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:53,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:59:53,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841505276] [2021-11-20 23:59:53,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841505276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:53,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:53,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:59:53,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031360728] [2021-11-20 23:59:53,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:53,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:59:53,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:59:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:59:53,568 INFO L87 Difference]: Start difference. First operand 179 states and 263 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:55,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:56,294 INFO L93 Difference]: Finished difference Result 288 states and 420 transitions. [2021-11-20 23:59:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:59:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 23:59:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:56,297 INFO L225 Difference]: With dead ends: 288 [2021-11-20 23:59:56,297 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 23:59:56,299 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:59:56,300 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 25 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:56,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 302 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:59:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 23:59:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-20 23:59:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4719101123595506) internal successors, (262), 178 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2021-11-20 23:59:56,316 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 51 [2021-11-20 23:59:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:56,317 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2021-11-20 23:59:56,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2021-11-20 23:59:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 23:59:56,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:56,320 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:56,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:59:56,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 304275934, now seen corresponding path program 1 times [2021-11-20 23:59:56,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:56,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318219563] [2021-11-20 23:59:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:56,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:59:56,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318219563] [2021-11-20 23:59:56,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318219563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:56,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:56,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:59:56,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403441168] [2021-11-20 23:59:56,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:56,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:59:56,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:59:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:59:56,423 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:58,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:59,205 INFO L93 Difference]: Finished difference Result 288 states and 418 transitions. [2021-11-20 23:59:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:59:59,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-20 23:59:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:59,214 INFO L225 Difference]: With dead ends: 288 [2021-11-20 23:59:59,214 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 23:59:59,215 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:59:59,216 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:59,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 298 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:59:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 23:59:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-20 23:59:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4662921348314606) internal successors, (261), 178 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 261 transitions. [2021-11-20 23:59:59,232 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 261 transitions. Word has length 52 [2021-11-20 23:59:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:59,233 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 261 transitions. [2021-11-20 23:59:59,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:59:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 261 transitions. [2021-11-20 23:59:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 23:59:59,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:59,235 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:59,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:59:59,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1604412653, now seen corresponding path program 1 times [2021-11-20 23:59:59,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:59,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272372070] [2021-11-20 23:59:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:59,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:59:59,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:59,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272372070] [2021-11-20 23:59:59,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272372070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:59,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:59,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:59:59,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925094936] [2021-11-20 23:59:59,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:59,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:59:59,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:59,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:59:59,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:59:59,346 INFO L87 Difference]: Start difference. First operand 179 states and 261 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:01,361 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:01,963 INFO L93 Difference]: Finished difference Result 288 states and 416 transitions. [2021-11-21 00:00:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:01,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-21 00:00:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:01,972 INFO L225 Difference]: With dead ends: 288 [2021-11-21 00:00:01,973 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 00:00:01,973 INFO L932 BasicCegarLoop]: 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 [2021-11-21 00:00:01,974 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 21 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:01,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 296 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 00:00:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 00:00:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-21 00:00:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4606741573033708) internal successors, (260), 178 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 260 transitions. [2021-11-21 00:00:01,987 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 260 transitions. Word has length 53 [2021-11-21 00:00:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:01,988 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 260 transitions. [2021-11-21 00:00:01,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 260 transitions. [2021-11-21 00:00:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 00:00:01,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:01,990 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:01,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:00:01,990 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash -131113917, now seen corresponding path program 1 times [2021-11-21 00:00:01,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:01,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435681289] [2021-11-21 00:00:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:01,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:00:02,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:02,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435681289] [2021-11-21 00:00:02,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435681289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:02,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:02,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:00:02,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479966663] [2021-11-21 00:00:02,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:02,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:02,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:02,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:02,078 INFO L87 Difference]: Start difference. First operand 179 states and 260 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:04,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:04,613 INFO L93 Difference]: Finished difference Result 288 states and 414 transitions. [2021-11-21 00:00:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 00:00:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:04,621 INFO L225 Difference]: With dead ends: 288 [2021-11-21 00:00:04,621 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 00:00:04,622 INFO L932 BasicCegarLoop]: 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 [2021-11-21 00:00:04,623 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 19 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:04,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 294 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 00:00:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 00:00:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-21 00:00:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4550561797752808) internal successors, (259), 178 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 259 transitions. [2021-11-21 00:00:04,634 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 259 transitions. Word has length 54 [2021-11-21 00:00:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:04,635 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 259 transitions. [2021-11-21 00:00:04,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 259 transitions. [2021-11-21 00:00:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 00:00:04,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:04,637 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:04,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:00:04,638 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:04,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1190390568, now seen corresponding path program 1 times [2021-11-21 00:00:04,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:04,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42054563] [2021-11-21 00:00:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:04,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:00:04,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:04,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42054563] [2021-11-21 00:00:04,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42054563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:04,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:04,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:00:04,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442873530] [2021-11-21 00:00:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:04,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:04,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:04,774 INFO L87 Difference]: Start difference. First operand 179 states and 259 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:06,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:07,172 INFO L93 Difference]: Finished difference Result 281 states and 404 transitions. [2021-11-21 00:00:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:07,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-21 00:00:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:07,174 INFO L225 Difference]: With dead ends: 281 [2021-11-21 00:00:07,174 INFO L226 Difference]: Without dead ends: 183 [2021-11-21 00:00:07,175 INFO L932 BasicCegarLoop]: 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 [2021-11-21 00:00:07,176 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 13 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:07,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 284 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:00:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-21 00:00:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2021-11-21 00:00:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.449438202247191) internal successors, (258), 178 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 258 transitions. [2021-11-21 00:00:07,184 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 258 transitions. Word has length 55 [2021-11-21 00:00:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:07,187 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 258 transitions. [2021-11-21 00:00:07,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 258 transitions. [2021-11-21 00:00:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 00:00:07,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:07,189 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:00:07,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:00:07,189 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2088995257, now seen corresponding path program 1 times [2021-11-21 00:00:07,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:07,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727043723] [2021-11-21 00:00:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:07,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:00:07,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:07,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727043723] [2021-11-21 00:00:07,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727043723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:07,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567794605] [2021-11-21 00:00:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:07,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:07,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:07,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:00:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:00:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:00:07,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:00:08,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567794605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:08,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:00:08,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2021-11-21 00:00:08,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793795717] [2021-11-21 00:00:08,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:08,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:00:08,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:00:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:00:08,119 INFO L87 Difference]: Start difference. First operand 179 states and 258 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:10,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:10,999 INFO L93 Difference]: Finished difference Result 332 states and 485 transitions. [2021-11-21 00:00:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:00:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-21 00:00:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:11,003 INFO L225 Difference]: With dead ends: 332 [2021-11-21 00:00:11,003 INFO L226 Difference]: Without dead ends: 330 [2021-11-21 00:00:11,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:00:11,005 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 88 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:11,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 303 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 00:00:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-21 00:00:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 253. [2021-11-21 00:00:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.4642857142857142) internal successors, (369), 252 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 369 transitions. [2021-11-21 00:00:11,020 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 369 transitions. Word has length 55 [2021-11-21 00:00:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:11,020 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 369 transitions. [2021-11-21 00:00:11,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 369 transitions. [2021-11-21 00:00:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 00:00:11,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:11,023 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:11,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:11,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 00:00:11,246 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2074642518, now seen corresponding path program 1 times [2021-11-21 00:00:11,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:11,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866274689] [2021-11-21 00:00:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:11,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:00:11,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866274689] [2021-11-21 00:00:11,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866274689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855644675] [2021-11-21 00:00:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:11,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:11,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:11,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:00:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:00:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:00:12,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:00:12,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855644675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:00:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950055786] [2021-11-21 00:00:12,777 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:00:12,777 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:00:12,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:00:12,790 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:00:12,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:00:15,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:15,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:00:15,926 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:00:15,930 INFO L158 Benchmark]: Toolchain (without parser) took 37773.07ms. Allocated memory was 94.4MB in the beginning and 176.2MB in the end (delta: 81.8MB). Free memory was 56.4MB in the beginning and 64.7MB in the end (delta: -8.3MB). Peak memory consumption was 102.7MB. Max. memory is 16.1GB. [2021-11-21 00:00:15,930 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 94.4MB. Free memory was 64.7MB in the beginning and 64.6MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:00:15,931 INFO L158 Benchmark]: CACSL2BoogieTranslator took 902.32ms. Allocated memory was 94.4MB in the beginning and 140.5MB in the end (delta: 46.1MB). Free memory was 56.1MB in the beginning and 96.4MB in the end (delta: -40.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:00:15,931 INFO L158 Benchmark]: Boogie Procedure Inliner took 128.19ms. Allocated memory is still 140.5MB. Free memory was 96.4MB in the beginning and 91.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 00:00:15,931 INFO L158 Benchmark]: Boogie Preprocessor took 160.63ms. Allocated memory is still 140.5MB. Free memory was 91.6MB in the beginning and 85.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 00:00:15,932 INFO L158 Benchmark]: RCFGBuilder took 4052.97ms. Allocated memory was 140.5MB in the beginning and 176.2MB in the end (delta: 35.7MB). Free memory was 85.3MB in the beginning and 138.9MB in the end (delta: -53.6MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. [2021-11-21 00:00:15,932 INFO L158 Benchmark]: TraceAbstraction took 32519.92ms. Allocated memory is still 176.2MB. Free memory was 138.9MB in the beginning and 64.7MB in the end (delta: 74.2MB). Peak memory consumption was 104.1MB. Max. memory is 16.1GB. [2021-11-21 00:00:15,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 94.4MB. Free memory was 64.7MB in the beginning and 64.6MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 902.32ms. Allocated memory was 94.4MB in the beginning and 140.5MB in the end (delta: 46.1MB). Free memory was 56.1MB in the beginning and 96.4MB in the end (delta: -40.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 128.19ms. Allocated memory is still 140.5MB. Free memory was 96.4MB in the beginning and 91.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 160.63ms. Allocated memory is still 140.5MB. Free memory was 91.6MB in the beginning and 85.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 4052.97ms. Allocated memory was 140.5MB in the beginning and 176.2MB in the end (delta: 35.7MB). Free memory was 85.3MB in the beginning and 138.9MB in the end (delta: -53.6MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. * TraceAbstraction took 32519.92ms. Allocated memory is still 176.2MB. Free memory was 138.9MB in the beginning and 64.7MB in the end (delta: 74.2MB). Peak memory consumption was 104.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 00:00:15,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P --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 32bit --witnessprinter.graph.data.programhash cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:00:18,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:00:18,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:00:18,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:00:18,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:00:18,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:00:18,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:00:18,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:00:18,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:00:18,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:00:18,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:00:18,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:00:18,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:00:18,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:00:18,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:00:18,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:00:18,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:00:18,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:00:18,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:00:18,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:00:18,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:00:18,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:00:18,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:00:18,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:00:18,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:00:18,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:00:18,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:00:18,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:00:18,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:00:18,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:00:18,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:00:18,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:00:18,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:00:18,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:00:18,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:00:18,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:00:18,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:00:18,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:00:18,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:00:18,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:00:18,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:00:18,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:00:18,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:00:18,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:00:18,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:00:18,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:00:18,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:00:18,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:00:18,862 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:00:18,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:00:18,864 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:00:18,864 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:00:18,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:00:18,866 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:00:18,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:00:18,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:00:18,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:00:18,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:00:18,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:00:18,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:00:18,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:00:18,870 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:00:18,870 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:00:18,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:00:18,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:00:18,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:00:18,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:00:18,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:00:18,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:00:18,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:00:18,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:00:18,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:00:18,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:00:18,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:00:18,874 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:00:18,874 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:00:18,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:00:18,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:00:18,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:00:18,876 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb7820adb8b2f38a9324aaaef54a50c7e172a86afb91c31d3452a676649fd690 [2021-11-21 00:00:19,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:00:19,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:00:19,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:00:19,404 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:00:19,404 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:00:19,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-11-21 00:00:19,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/72266c694/19ee81a5e5224519a2e730543dbbd500/FLAGa5da2e394 [2021-11-21 00:00:20,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:00:20,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c [2021-11-21 00:00:20,427 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/72266c694/19ee81a5e5224519a2e730543dbbd500/FLAGa5da2e394 [2021-11-21 00:00:20,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/data/72266c694/19ee81a5e5224519a2e730543dbbd500 [2021-11-21 00:00:20,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:00:20,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:00:20,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:00:20,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:00:20,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:00:20,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:00:20" (1/1) ... [2021-11-21 00:00:20,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3869d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:20, skipping insertion in model container [2021-11-21 00:00:20,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:00:20" (1/1) ... [2021-11-21 00:00:20,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:00:20,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:00:21,042 WARN L230 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_69245159-2946-466b-bb5c-55c499c68b75/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c[65397,65410] [2021-11-21 00:00:21,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:00:21,071 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:00:21,181 WARN L230 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_69245159-2946-466b-bb5c-55c499c68b75/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-1.c[65397,65410] [2021-11-21 00:00:21,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:00:21,219 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:00:21,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21 WrapperNode [2021-11-21 00:00:21,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:00:21,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:00:21,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:00:21,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:00:21,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,313 INFO L137 Inliner]: procedures = 35, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 689 [2021-11-21 00:00:21,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:00:21,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:00:21,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:00:21,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:00:21,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:00:21,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:00:21,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:00:21,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:00:21,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (1/1) ... [2021-11-21 00:00:21,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:00:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:21,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:00:21,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:00:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:00:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:00:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:00:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 00:00:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:00:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:00:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:00:21,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:00:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 00:00:21,711 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:00:21,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:00:21,731 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 00:00:26,250 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-21 00:00:26,251 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-21 00:00:26,251 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:00:26,262 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:00:26,262 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:00:26,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:00:26 BoogieIcfgContainer [2021-11-21 00:00:26,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:00:26,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:00:26,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:00:26,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:00:26,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:00:20" (1/3) ... [2021-11-21 00:00:26,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395b7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:00:26, skipping insertion in model container [2021-11-21 00:00:26,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:00:21" (2/3) ... [2021-11-21 00:00:26,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395b7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:00:26, skipping insertion in model container [2021-11-21 00:00:26,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:00:26" (3/3) ... [2021-11-21 00:00:26,276 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.02.i.cil-1.c [2021-11-21 00:00:26,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:00:26,284 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:00:26,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:00:26,356 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:00:26,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:00:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:00:26,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:26,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:26,390 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:26,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:26,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2021-11-21 00:00:26,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:00:26,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516919613] [2021-11-21 00:00:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:26,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:00:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:00:26,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:00:26,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:00:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:26,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:00:26,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:00:27,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:00:27,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:00:27,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516919613] [2021-11-21 00:00:27,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516919613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:27,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:27,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:00:27,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290231580] [2021-11-21 00:00:27,312 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:27,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:00:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:27,356 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:27,589 INFO L93 Difference]: Finished difference Result 485 states and 819 transitions. [2021-11-21 00:00:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-21 00:00:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:27,606 INFO L225 Difference]: With dead ends: 485 [2021-11-21 00:00:27,606 INFO L226 Difference]: Without dead ends: 312 [2021-11-21 00:00:27,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:27,614 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 358 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:27,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 586 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:00:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-21 00:00:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-11-21 00:00:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.5016077170418007) internal successors, (467), 311 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 467 transitions. [2021-11-21 00:00:27,681 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 467 transitions. Word has length 24 [2021-11-21 00:00:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:27,682 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 467 transitions. [2021-11-21 00:00:27,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 467 transitions. [2021-11-21 00:00:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 00:00:27,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:27,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:00:27,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-21 00:00:27,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:00:27,902 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1698457876, now seen corresponding path program 1 times [2021-11-21 00:00:27,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:00:27,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707088476] [2021-11-21 00:00:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:27,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:00:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:00:27,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:00:27,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:00:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:00:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:00:28,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:00:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:00:28,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:00:28,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707088476] [2021-11-21 00:00:28,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707088476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:28,961 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:28,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:00:28,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788404388] [2021-11-21 00:00:28,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:28,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:28,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:00:28,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:28,970 INFO L87 Difference]: Start difference. First operand 312 states and 467 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:30,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:31,303 INFO L93 Difference]: Finished difference Result 718 states and 1080 transitions. [2021-11-21 00:00:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-21 00:00:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:31,312 INFO L225 Difference]: With dead ends: 718 [2021-11-21 00:00:31,313 INFO L226 Difference]: Without dead ends: 513 [2021-11-21 00:00:31,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:31,316 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 268 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:31,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 596 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:00:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-21 00:00:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2021-11-21 00:00:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.494140625) internal successors, (765), 512 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 765 transitions. [2021-11-21 00:00:31,379 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 765 transitions. Word has length 60 [2021-11-21 00:00:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:31,380 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 765 transitions. [2021-11-21 00:00:31,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:00:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 765 transitions. [2021-11-21 00:00:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-21 00:00:31,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:31,388 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-21 00:00:31,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:31,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:00:31,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1093818034, now seen corresponding path program 1 times [2021-11-21 00:00:31,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:00:31,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572515345] [2021-11-21 00:00:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:31,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:00:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:00:31,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:00:31,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69245159-2946-466b-bb5c-55c499c68b75/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:00:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:00:32,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:33,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:00:33,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 2058 treesize of output 1842 [2021-11-21 00:00:36,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:00:36,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2067 treesize of output 1935 [2021-11-21 00:06:52,329 WARN L227 SmtUtils]: Spent 6.26m on a formula simplification. DAG size of input: 319 DAG size of output: 205 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:06:52,333 INFO L354 Elim1Store]: treesize reduction 2346, result has 38.3 percent of original size [2021-11-21 00:06:52,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 1863 treesize of output 1947 [2021-11-21 00:06:52,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1986 treesize of output 1782 [2021-11-21 00:06:52,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1782 treesize of output 1578 [2021-11-21 00:11:00,437 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 13 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)