./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/process_queue.i --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_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/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_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/process_queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/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_24551ad5-4079-4960-bb73-ad0ae920bd59/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 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:48:30,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:48:30,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:48:30,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:48:30,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:48:30,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:48:30,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:48:30,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:48:30,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:48:30,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:48:30,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:48:30,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:48:30,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:48:30,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:48:30,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:48:30,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:48:30,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:48:30,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:48:30,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:48:30,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:48:30,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:48:30,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:48:30,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:48:30,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:48:30,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:48:30,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:48:30,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:48:30,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:48:30,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:48:30,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:48:30,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:48:30,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:48:30,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:48:30,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:48:30,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:48:30,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:48:30,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:48:30,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:48:30,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:48:30,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:48:30,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:48:30,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:48:30,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:48:30,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:48:30,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:48:30,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:48:30,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:48:30,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:48:30,672 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:48:30,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:48:30,673 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:48:30,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:48:30,674 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:48:30,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:48:30,675 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:48:30,675 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:48:30,675 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:48:30,676 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:48:30,676 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:48:30,676 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:48:30,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:48:30,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:48:30,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:48:30,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:48:30,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:48:30,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:48:30,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:48:30,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:48:30,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:48:30,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:48:30,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:48:30,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:48:30,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:48:30,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:48:30,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:48:30,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:48:30,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:48:30,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:48:30,683 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:48:30,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:48:30,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:48:30,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:48:30,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:48:30,684 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_24551ad5-4079-4960-bb73-ad0ae920bd59/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2021-11-21 01:48:31,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:48:31,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:48:31,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:48:31,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:48:31,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:48:31,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/heap-data/process_queue.i [2021-11-21 01:48:31,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/data/0b2fb56e8/f39c607d8da84de591a28292cbdd8389/FLAG1f9305c37 [2021-11-21 01:48:31,862 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:48:31,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/sv-benchmarks/c/heap-data/process_queue.i [2021-11-21 01:48:31,897 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/data/0b2fb56e8/f39c607d8da84de591a28292cbdd8389/FLAG1f9305c37 [2021-11-21 01:48:32,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/data/0b2fb56e8/f39c607d8da84de591a28292cbdd8389 [2021-11-21 01:48:32,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:48:32,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:48:32,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:32,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:48:32,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:48:32,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cb8f99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32, skipping insertion in model container [2021-11-21 01:48:32,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:48:32,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:48:32,549 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_24551ad5-4079-4960-bb73-ad0ae920bd59/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2021-11-21 01:48:32,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:32,570 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:48:32,617 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_24551ad5-4079-4960-bb73-ad0ae920bd59/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2021-11-21 01:48:32,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:32,674 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:48:32,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32 WrapperNode [2021-11-21 01:48:32,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:32,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:48:32,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:48:32,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:48:32,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,759 INFO L137 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 111 [2021-11-21 01:48:32,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:48:32,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:48:32,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:48:32,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:48:32,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:48:32,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:48:32,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:48:32,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:48:32,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (1/1) ... [2021-11-21 01:48:32,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:48:32,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:32,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:48:32,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:48:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:48:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:48:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:48:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:48:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:48:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:48:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:48:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:48:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:48:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:48:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:48:32,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:48:33,090 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:48:33,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:48:33,413 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:48:33,519 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:48:33,520 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:48:33,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:48:33 BoogieIcfgContainer [2021-11-21 01:48:33,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:48:33,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:48:33,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:48:33,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:48:33,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:48:32" (1/3) ... [2021-11-21 01:48:33,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd960c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:48:33, skipping insertion in model container [2021-11-21 01:48:33,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:32" (2/3) ... [2021-11-21 01:48:33,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd960c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:48:33, skipping insertion in model container [2021-11-21 01:48:33,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:48:33" (3/3) ... [2021-11-21 01:48:33,535 INFO L111 eAbstractionObserver]: Analyzing ICFG process_queue.i [2021-11-21 01:48:33,543 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:48:33,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:48:33,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:48:33,632 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 01:48:33,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:48:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 01:48:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:48:33,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:33,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:33,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:33,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1991608940, now seen corresponding path program 1 times [2021-11-21 01:48:33,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:33,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322420690] [2021-11-21 01:48:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:33,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:34,296 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 01:48:34,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322420690] [2021-11-21 01:48:34,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322420690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:34,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:34,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:48:34,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544083252] [2021-11-21 01:48:34,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:34,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:48:34,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:48:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:48:34,370 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 01:48:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:34,805 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2021-11-21 01:48:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:48:34,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2021-11-21 01:48:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:34,822 INFO L225 Difference]: With dead ends: 61 [2021-11-21 01:48:34,822 INFO L226 Difference]: Without dead ends: 42 [2021-11-21 01:48:34,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:48:34,835 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:34,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:48:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-21 01:48:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2021-11-21 01:48:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 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 01:48:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2021-11-21 01:48:34,883 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 8 [2021-11-21 01:48:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:34,883 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2021-11-21 01:48:34,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 01:48:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2021-11-21 01:48:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:48:34,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:34,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:34,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:48:34,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash -367164633, now seen corresponding path program 1 times [2021-11-21 01:48:34,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:34,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869500170] [2021-11-21 01:48:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:34,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:34,949 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 01:48:34,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869500170] [2021-11-21 01:48:34,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869500170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:34,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:34,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:48:34,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928476954] [2021-11-21 01:48:34,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:34,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:48:34,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:48:34,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:48:34,954 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 01:48:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:35,095 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2021-11-21 01:48:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:48:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-21 01:48:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:35,097 INFO L225 Difference]: With dead ends: 65 [2021-11-21 01:48:35,097 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 01:48:35,098 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 [2021-11-21 01:48:35,100 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:35,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:48:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 01:48:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-11-21 01:48:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 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) [2021-11-21 01:48:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-11-21 01:48:35,111 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 9 [2021-11-21 01:48:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:35,111 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-11-21 01:48:35,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 01:48:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-11-21 01:48:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:48:35,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:35,113 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:35,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:48:35,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1347617242, now seen corresponding path program 1 times [2021-11-21 01:48:35,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:35,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979022469] [2021-11-21 01:48:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:35,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:35,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:35,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979022469] [2021-11-21 01:48:35,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979022469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:48:35,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221038386] [2021-11-21 01:48:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:35,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:35,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:35,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:35,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:48:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:48:35,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:48:36,135 INFO L354 Elim1Store]: treesize reduction 501, result has 16.6 percent of original size [2021-11-21 01:48:36,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 356 treesize of output 288 [2021-11-21 01:48:36,478 INFO L354 Elim1Store]: treesize reduction 681, result has 16.6 percent of original size [2021-11-21 01:48:36,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 653 treesize of output 557 [2021-11-21 01:48:36,564 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-21 01:48:36,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 669 treesize of output 669 [2021-11-21 01:48:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 25 [2021-11-21 01:48:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:36,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:48:36,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 86 [2021-11-21 01:48:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:36,948 INFO L354 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2021-11-21 01:48:36,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 77 [2021-11-21 01:48:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:37,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 25 [2021-11-21 01:48:37,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:37,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 33 [2021-11-21 01:48:37,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:37,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:37,220 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-21 01:48:37,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 60 [2021-11-21 01:48:37,556 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-11-21 01:48:37,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 243 treesize of output 152 [2021-11-21 01:48:37,747 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-21 01:48:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2021-11-21 01:48:37,758 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:48:37,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 19 [2021-11-21 01:48:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:37,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:38,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221038386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:38,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82253864] [2021-11-21 01:48:38,855 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:48:38,856 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:48:38,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:48:38,867 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:48:38,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:48:38,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:38,941 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:48:38,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 01:48:38,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:38,985 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:48:38,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:48:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 36 [2021-11-21 01:48:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,435 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 01:48:39,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 66 [2021-11-21 01:48:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,465 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:48:39,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 54 [2021-11-21 01:48:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,547 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-21 01:48:39,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:48:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,606 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:48:39,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:48:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:39,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 36 [2021-11-21 01:48:43,612 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:48:45,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [82253864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:45,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:48:45,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5, 5] total 16 [2021-11-21 01:48:45,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845577368] [2021-11-21 01:48:45,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:45,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:48:45,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:48:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:48:45,731 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 01:48:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:46,188 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2021-11-21 01:48:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:48:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 11 [2021-11-21 01:48:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:46,190 INFO L225 Difference]: With dead ends: 62 [2021-11-21 01:48:46,190 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 01:48:46,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:48:46,193 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:46,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:48:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 01:48:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-21 01:48:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 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) [2021-11-21 01:48:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2021-11-21 01:48:46,204 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 11 [2021-11-21 01:48:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2021-11-21 01:48:46,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 01:48:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2021-11-21 01:48:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:48:46,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:46,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:46,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:46,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:46,430 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash 45959603, now seen corresponding path program 1 times [2021-11-21 01:48:46,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:46,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767701246] [2021-11-21 01:48:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:46,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:46,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:46,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767701246] [2021-11-21 01:48:46,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767701246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:48:46,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225477277] [2021-11-21 01:48:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:46,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:46,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:46,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:48:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-21 01:48:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:46,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 94 [2021-11-21 01:48:46,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2021-11-21 01:48:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 54 [2021-11-21 01:48:46,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-11-21 01:48:47,026 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 42 treesize of output 34 [2021-11-21 01:48:47,030 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 31 treesize of output 19 [2021-11-21 01:48:47,068 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 15 treesize of output 7 [2021-11-21 01:48:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:47,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:48:47,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-21 01:48:47,188 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 39 treesize of output 31 [2021-11-21 01:48:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:47,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225477277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:47,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697160376] [2021-11-21 01:48:47,445 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:48:47,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:48:47,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:48:47,446 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:48:47,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:48:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,498 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:48:47,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:48:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 01:48:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 36 [2021-11-21 01:48:47,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 36 [2021-11-21 01:48:47,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:47,962 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-21 01:48:47,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:48:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,030 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:48:48,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 30 [2021-11-21 01:48:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 60 [2021-11-21 01:48:48,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:48,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 48 [2021-11-21 01:48:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:48:53,261 INFO L354 Elim1Store]: treesize reduction 90, result has 38.4 percent of original size [2021-11-21 01:48:53,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 520 treesize of output 542 [2021-11-21 01:48:53,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:53,699 INFO L354 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2021-11-21 01:48:53,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 543 treesize of output 549 [2021-11-21 01:48:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:54,362 INFO L354 Elim1Store]: treesize reduction 110, result has 41.2 percent of original size [2021-11-21 01:48:54,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 550 treesize of output 585 [2021-11-21 01:48:54,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:48:54,740 INFO L354 Elim1Store]: treesize reduction 90, result has 38.4 percent of original size [2021-11-21 01:48:54,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 600 treesize of output 622 [2021-11-21 01:48:54,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:54,953 INFO L354 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2021-11-21 01:48:54,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 623 treesize of output 629 [2021-11-21 01:48:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:55,294 INFO L354 Elim1Store]: treesize reduction 140, result has 25.1 percent of original size [2021-11-21 01:48:55,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 630 treesize of output 635 [2021-11-21 01:48:55,519 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-21 01:48:55,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 644 treesize of output 668 [2021-11-21 01:48:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:55,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:55,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:55,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:55,789 INFO L354 Elim1Store]: treesize reduction 276, result has 21.6 percent of original size [2021-11-21 01:48:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 661 treesize of output 682 [2021-11-21 01:48:55,919 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-21 01:48:55,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 685 treesize of output 694 [2021-11-21 01:48:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:55,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:48:55,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:56,128 INFO L354 Elim1Store]: treesize reduction 210, result has 18.9 percent of original size [2021-11-21 01:48:56,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 691 treesize of output 700 [2021-11-21 01:49:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 01:49:14,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:14,903 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:49:14,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-21 01:49:14,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:14,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:15,011 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-21 01:49:15,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 89 [2021-11-21 01:49:15,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 01:49:15,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:49:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-11-21 01:49:15,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:49:15,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:15,409 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-21 01:49:15,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 89 [2021-11-21 01:49:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 01:49:15,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-11-21 01:49:15,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:49:17,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:17,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:17,416 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-21 01:49:17,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 89 [2021-11-21 01:49:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 01:49:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-11-21 01:49:17,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:17,665 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-21 01:49:17,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 89 [2021-11-21 01:49:17,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 01:49:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-11-21 01:49:17,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:49:17,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:49:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 01:49:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:17,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:17,979 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:49:17,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-21 01:49:19,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:19,750 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-21 01:49:19,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 89 [2021-11-21 01:49:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:19,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-11-21 01:49:19,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 01:49:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-11-21 01:49:19,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:19,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:20,028 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-21 01:49:20,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 89 [2021-11-21 01:49:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 01:49:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-11-21 01:49:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 01:49:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:20,267 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 01:49:20,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-21 01:49:20,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:49:20,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:49:22,114 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:49:22,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:49:22,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:49:22,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-11-21 01:49:22,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709474805] [2021-11-21 01:49:22,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:49:22,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:49:22,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:49:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:49:22,726 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 01:49:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:25,729 INFO L93 Difference]: Finished difference Result 266 states and 373 transitions. [2021-11-21 01:49:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-21 01:49:25,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 16 [2021-11-21 01:49:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:25,733 INFO L225 Difference]: With dead ends: 266 [2021-11-21 01:49:25,733 INFO L226 Difference]: Without dead ends: 244 [2021-11-21 01:49:25,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:49:25,737 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 453 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:25,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 208 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:49:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-21 01:49:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 74. [2021-11-21 01:49:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 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 01:49:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 103 transitions. [2021-11-21 01:49:25,758 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 103 transitions. Word has length 16 [2021-11-21 01:49:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:25,759 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 103 transitions. [2021-11-21 01:49:25,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 01:49:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 103 transitions. [2021-11-21 01:49:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:49:25,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:25,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:25,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:25,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:49:25,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:49:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash 66708409, now seen corresponding path program 1 times [2021-11-21 01:49:25,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:25,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011141336] [2021-11-21 01:49:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:25,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:26,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:49:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011141336] [2021-11-21 01:49:26,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011141336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:49:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766511351] [2021-11-21 01:49:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:26,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:49:26,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:49:26,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:49:26,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24551ad5-4079-4960-bb73-ad0ae920bd59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:49:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:26,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-21 01:49:26,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:26,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:49:26,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 96 [2021-11-21 01:49:26,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 103 [2021-11-21 01:49:26,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 59 [2021-11-21 01:49:26,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 01:49:26,730 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-21 01:49:26,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-21 01:49:27,232 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-21 01:49:27,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 327 treesize of output 269 [2021-11-21 01:49:27,272 INFO L354 Elim1Store]: treesize reduction 118, result has 12.6 percent of original size [2021-11-21 01:49:27,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 324 [2021-11-21 01:49:27,328 INFO L354 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2021-11-21 01:49:27,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 350 treesize of output 297 [2021-11-21 01:49:27,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-21 01:49:27,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:49:27,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 80 [2021-11-21 01:49:27,481 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 63 treesize of output 59