./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan --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 909b1dc421a216ac8a75bed7ba3ab31ab21b81a7 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan --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 909b1dc421a216ac8a75bed7ba3ab31ab21b81a7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvneg (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:35:36,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:35:36,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:35:36,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:35:36,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:35:36,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:35:36,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:35:36,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:35:36,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:35:36,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:35:36,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:35:36,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:35:36,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:35:36,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:35:36,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:35:36,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:35:36,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:35:36,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:35:36,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:35:36,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:35:36,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:35:36,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:35:36,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:35:36,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:35:36,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:35:36,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:35:36,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:35:36,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:35:36,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:35:36,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:35:36,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:35:36,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:35:36,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:35:36,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:35:36,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:35:36,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:35:36,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:35:36,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:35:36,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:35:36,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:35:36,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:35:36,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:35:36,860 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:35:36,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:35:36,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:35:36,862 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:35:36,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:35:36,862 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:35:36,862 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:35:36,862 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:35:36,862 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:35:36,863 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:35:36,863 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:35:36,863 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:35:36,863 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:35:36,863 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:35:36,864 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:35:36,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:35:36,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:35:36,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:35:36,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:35:36,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:35:36,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:35:36,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:35:36,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:35:36,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:35:36,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:35:36,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:35:36,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:35:36,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:35:36,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:35:36,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:35:36,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:35:36,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:35:36,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:35:36,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:35:36,868 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:35:36,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:35:36,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:35:36,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:35:36,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:35:36,868 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-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 909b1dc421a216ac8a75bed7ba3ab31ab21b81a7 [2020-12-09 12:35:37,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:35:37,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:35:37,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:35:37,062 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:35:37,062 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:35:37,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-09 12:35:37,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/09b215a46/080ee31416b5405484abc3569ee992d2/FLAG7500c447f [2020-12-09 12:35:37,449 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:35:37,449 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-09 12:35:37,454 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/09b215a46/080ee31416b5405484abc3569ee992d2/FLAG7500c447f [2020-12-09 12:35:37,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/09b215a46/080ee31416b5405484abc3569ee992d2 [2020-12-09 12:35:37,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:35:37,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:35:37,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:35:37,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:35:37,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:35:37,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc8a269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37, skipping insertion in model container [2020-12-09 12:35:37,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:35:37,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:35:37,604 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2020-12-09 12:35:37,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:35:37,622 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:35:37,635 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2020-12-09 12:35:37,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:35:37,653 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:35:37,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37 WrapperNode [2020-12-09 12:35:37,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:35:37,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:35:37,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:35:37,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:35:37,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:35:37,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:35:37,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:35:37,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:35:37,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... [2020-12-09 12:35:37,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:35:37,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:35:37,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:35:37,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:35:37,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:35:37,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:35:37,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:35:37,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:35:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:35:38,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:35:38,046 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-09 12:35:38,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:35:38 BoogieIcfgContainer [2020-12-09 12:35:38,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:35:38,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:35:38,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:35:38,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:35:38,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:35:37" (1/3) ... [2020-12-09 12:35:38,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae2d50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:35:38, skipping insertion in model container [2020-12-09 12:35:38,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:37" (2/3) ... [2020-12-09 12:35:38,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae2d50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:35:38, skipping insertion in model container [2020-12-09 12:35:38,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:35:38" (3/3) ... [2020-12-09 12:35:38,054 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2020-12-09 12:35:38,064 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:35:38,066 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 12:35:38,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 12:35:38,091 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:35:38,091 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:35:38,091 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:35:38,091 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:35:38,091 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:35:38,091 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:35:38,092 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:35:38,092 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:35:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 12:35:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 12:35:38,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:38,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 12:35:38,105 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash -712442551, now seen corresponding path program 1 times [2020-12-09 12:35:38,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:35:38,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239262269] [2020-12-09 12:35:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:35:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:38,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239262269] [2020-12-09 12:35:38,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:38,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:35:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589460667] [2020-12-09 12:35:38,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:35:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:35:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:35:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:35:38,227 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-09 12:35:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:38,238 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-12-09 12:35:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:35:38,239 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 12:35:38,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:38,245 INFO L225 Difference]: With dead ends: 28 [2020-12-09 12:35:38,245 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 12:35:38,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:35:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 12:35:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 12:35:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 12:35:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 12:35:38,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2020-12-09 12:35:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:38,279 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 12:35:38,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:35:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 12:35:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 12:35:38,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:38,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:38,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:35:38,281 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash -994141722, now seen corresponding path program 1 times [2020-12-09 12:35:38,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:35:38,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514230379] [2020-12-09 12:35:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:35:38,306 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:35:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200464141] [2020-12-09 12:35:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:38,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 12:35:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:38,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:38,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514230379] [2020-12-09 12:35:38,416 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:35:38,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200464141] [2020-12-09 12:35:38,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:38,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 12:35:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111090810] [2020-12-09 12:35:38,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:35:38,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:35:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:35:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:35:38,419 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 6 states. [2020-12-09 12:35:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:38,447 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2020-12-09 12:35:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:35:38,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 12:35:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:38,449 INFO L225 Difference]: With dead ends: 30 [2020-12-09 12:35:38,449 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 12:35:38,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:35:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 12:35:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-09 12:35:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 12:35:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-09 12:35:38,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 7 [2020-12-09 12:35:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:38,454 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-09 12:35:38,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:35:38,455 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-09 12:35:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 12:35:38,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:38,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:38,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 12:35:38,656 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash -704827549, now seen corresponding path program 1 times [2020-12-09 12:35:38,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:35:38,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703175994] [2020-12-09 12:35:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:35:38,673 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:35:38,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695791011] [2020-12-09 12:35:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:38,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 12:35:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:38,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:38,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703175994] [2020-12-09 12:35:38,822 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:35:38,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695791011] [2020-12-09 12:35:38,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:38,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-09 12:35:38,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045943323] [2020-12-09 12:35:38,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 12:35:38,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:35:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 12:35:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:35:38,824 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 8 states. [2020-12-09 12:35:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:39,306 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-09 12:35:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 12:35:39,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-09 12:35:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:39,308 INFO L225 Difference]: With dead ends: 46 [2020-12-09 12:35:39,308 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 12:35:39,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 12:35:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 12:35:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-12-09 12:35:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 12:35:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-09 12:35:39,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 8 [2020-12-09 12:35:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:39,315 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-09 12:35:39,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 12:35:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-09 12:35:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 12:35:39,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:39,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:39,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:39,518 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash 549408422, now seen corresponding path program 1 times [2020-12-09 12:35:39,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:35:39,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587618571] [2020-12-09 12:35:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:35:39,535 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:35:39,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256375151] [2020-12-09 12:35:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:39,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 12:35:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:39,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:39,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587618571] [2020-12-09 12:35:39,630 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:35:39,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256375151] [2020-12-09 12:35:39,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102442141] [2020-12-09 12:35:39,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 12:35:39,645 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:35:39,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:35:39,651 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:35:39,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:35:39,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:35:39,990 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:35:40,337 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-09 12:35:40,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:35:40,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 12:35:40,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-09 12:35:40,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726127536] [2020-12-09 12:35:40,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 12:35:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:35:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 12:35:40,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-09 12:35:40,518 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-09 12:35:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:40,584 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-12-09 12:35:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 12:35:40,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-09 12:35:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:40,585 INFO L225 Difference]: With dead ends: 57 [2020-12-09 12:35:40,585 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 12:35:40,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-12-09 12:35:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 12:35:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-12-09 12:35:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 12:35:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-09 12:35:40,590 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 13 [2020-12-09 12:35:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:40,590 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-09 12:35:40,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 12:35:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-09 12:35:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 12:35:40,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:40,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:40,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:40,792 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:40,792 INFO L82 PathProgramCache]: Analyzing trace with hash -99413341, now seen corresponding path program 1 times [2020-12-09 12:35:40,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:35:40,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007331263] [2020-12-09 12:35:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:35:40,805 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:35:40,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018083923] [2020-12-09 12:35:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 12:35:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 12:35:40,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:42,932 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_ULTIMATE.start_main_~r~0 (- 1)))) (let ((.cse6 (div (+ .cse3 (- 1)) (- 4294967296))) (.cse4 (+ (div (+ c_ULTIMATE.start_main_~r~0 (- 4294967296)) 4294967296) 1)) (.cse0 (= c_ULTIMATE.start_main_~q~0 0))) (let ((.cse1 (not .cse0)) (.cse2 (mod c_ULTIMATE.start_main_~A~0 4294967296)) (.cse5 (<= .cse6 .cse4))) (and (or (forall ((aux_div_ULTIMATE.start_main_~b~0_99 Int) (aux_mod_ULTIMATE.start_main_~b~0_99 Int)) (or (not (= (mod (+ (* aux_div_ULTIMATE.start_main_~b~0_99 4294967296) (* c_ULTIMATE.start_main_~r~0 (- 1)) aux_mod_ULTIMATE.start_main_~b~0_99) c_ULTIMATE.start_main_~q~0) 0)) (< aux_mod_ULTIMATE.start_main_~b~0_99 0) (<= 4294967296 aux_mod_ULTIMATE.start_main_~b~0_99) (= (mod c_ULTIMATE.start_main_~A~0 4294967296) aux_mod_ULTIMATE.start_main_~b~0_99))) .cse0) (or .cse1 (<= (div (+ .cse2 .cse3) (- 4294967296)) .cse4) .cse5) (or .cse1 (<= .cse6 (div (+ .cse2 .cse3 (- 1)) (- 4294967296))) .cse5))))) is different from false [2020-12-09 12:35:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 12:35:43,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007331263] [2020-12-09 12:35:43,038 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:35:43,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018083923] [2020-12-09 12:35:43,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:43,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 12:35:43,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749664771] [2020-12-09 12:35:43,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:35:43,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:35:43,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:35:43,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2020-12-09 12:35:43,039 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-12-09 12:35:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:43,083 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-12-09 12:35:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:35:43,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 12:35:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:43,085 INFO L225 Difference]: With dead ends: 54 [2020-12-09 12:35:43,085 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 12:35:43,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=18, Unknown=1, NotChecked=8, Total=42 [2020-12-09 12:35:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 12:35:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-12-09 12:35:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 12:35:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-09 12:35:43,090 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 14 [2020-12-09 12:35:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:43,090 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-09 12:35:43,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:35:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-09 12:35:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 12:35:43,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:43,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:43,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:43,291 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:43,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1318494067, now seen corresponding path program 1 times [2020-12-09 12:35:43,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:35:43,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330482655] [2020-12-09 12:35:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:35:43,301 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:35:43,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80692113] [2020-12-09 12:35:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 12:35:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:44,115 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 35 [2020-12-09 12:35:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:44,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:44,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330482655] [2020-12-09 12:35:44,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:35:44,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80692113] [2020-12-09 12:35:44,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 12:35:44,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938284266] [2020-12-09 12:35:44,237 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 12:35:44,237 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:35:44,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:35:44,237 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:35:44,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:35:44,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:35:44,859 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:35:45,281 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-09 12:35:45,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:35:45,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:45,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 12:35:45,736 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 12:35:45,736 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:35:45,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-09 12:35:45,950 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 12:35:45,951 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:35:45,951 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 12:35:45,952 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:35:45,952 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 12:35:45,953 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 12:35:45,968 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 12:35:45,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:35:45 BoogieIcfgContainer [2020-12-09 12:35:45,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:35:45,969 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:35:45,969 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:35:45,969 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:35:45,969 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:35:38" (3/4) ... [2020-12-09 12:35:45,972 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 12:35:45,972 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:35:45,973 INFO L168 Benchmark]: Toolchain (without parser) took 8503.21 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 68.4 MB in the beginning and 35.0 MB in the end (delta: 33.3 MB). Peak memory consumption was 60.4 MB. Max. memory is 16.1 GB. [2020-12-09 12:35:45,974 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 104.9 MB. Free memory was 84.6 MB in the beginning and 84.5 MB in the end (delta: 77.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:35:45,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.67 ms. Allocated memory is still 104.9 MB. Free memory was 68.2 MB in the beginning and 80.9 MB in the end (delta: -12.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:35:45,975 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 104.9 MB. Free memory was 80.9 MB in the beginning and 79.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:35:45,975 INFO L168 Benchmark]: Boogie Preprocessor took 20.07 ms. Allocated memory is still 104.9 MB. Free memory was 79.4 MB in the beginning and 78.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:35:45,976 INFO L168 Benchmark]: RCFGBuilder took 347.66 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 56.7 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:35:45,977 INFO L168 Benchmark]: TraceAbstraction took 7919.57 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 56.3 MB in the beginning and 35.0 MB in the end (delta: 21.3 MB). Peak memory consumption was 50.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:35:45,977 INFO L168 Benchmark]: Witness Printer took 3.37 ms. Allocated memory is still 132.1 MB. Free memory is still 35.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:35:45,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 104.9 MB. Free memory was 84.6 MB in the beginning and 84.5 MB in the end (delta: 77.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.67 ms. Allocated memory is still 104.9 MB. Free memory was 68.2 MB in the beginning and 80.9 MB in the end (delta: -12.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 104.9 MB. Free memory was 80.9 MB in the beginning and 79.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.07 ms. Allocated memory is still 104.9 MB. Free memory was 79.4 MB in the beginning and 78.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 347.66 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 56.7 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7919.57 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 56.3 MB in the beginning and 35.0 MB in the end (delta: 21.3 MB). Peak memory consumption was 50.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.37 ms. Allocated memory is still 132.1 MB. Free memory is still 35.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L16] COND TRUE !cond [L16] COND FALSE !(!cond) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND TRUE !(r >= b) [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 7.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 88 SDslu, 179 SDs, 0 SdLazy, 107 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 81 ConstructedInterpolants, 11 QuantifiedInterpolants, 18332 SizeOfPredicates, 20 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 18/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:35:47,529 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-12-09 12:35:47,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:35:47,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:35:47,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:35:47,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:35:47,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:35:47,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:35:47,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:35:47,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:35:47,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:35:47,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:35:47,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:35:47,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:35:47,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:35:47,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:35:47,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:35:47,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:35:47,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:35:47,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:35:47,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:35:47,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:35:47,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:35:47,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:35:47,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:35:47,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:35:47,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:35:47,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:35:47,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:35:47,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:35:47,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:35:47,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 12:35:47,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:35:47,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:35:47,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:35:47,608 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:35:47,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:35:47,609 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:35:47,609 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:35:47,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:35:47,609 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:35:47,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:35:47,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:35:47,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:35:47,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:35:47,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:35:47,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:35:47,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:35:47,610 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:35:47,611 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 12:35:47,611 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 12:35:47,611 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:35:47,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:35:47,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:35:47,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:35:47,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:35:47,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 12:35:47,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:35:47,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:35:47,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:35:47,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:35:47,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:35:47,612 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 12:35:47,613 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 12:35:47,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:35:47,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:35:47,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:35:47,613 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 909b1dc421a216ac8a75bed7ba3ab31ab21b81a7 [2020-12-09 12:35:47,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:35:47,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:35:47,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:35:47,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:35:47,877 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:35:47,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-09 12:35:47,918 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/56e832778/8aec664823364ac2aeced3457245c5ae/FLAGba6bd272e [2020-12-09 12:35:48,306 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:35:48,307 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-09 12:35:48,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/56e832778/8aec664823364ac2aeced3457245c5ae/FLAGba6bd272e [2020-12-09 12:35:48,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/data/56e832778/8aec664823364ac2aeced3457245c5ae [2020-12-09 12:35:48,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:35:48,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:35:48,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:35:48,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:35:48,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:35:48,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4834e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48, skipping insertion in model container [2020-12-09 12:35:48,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:35:48,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:35:48,469 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2020-12-09 12:35:48,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:35:48,489 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:35:48,499 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2020-12-09 12:35:48,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:35:48,522 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:35:48,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48 WrapperNode [2020-12-09 12:35:48,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:35:48,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:35:48,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:35:48,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:35:48,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:35:48,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:35:48,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:35:48,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:35:48,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... [2020-12-09 12:35:48,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:35:48,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:35:48,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:35:48,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:35:48,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:35:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 12:35:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:35:48,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:35:48,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:35:48,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:35:48,854 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-09 12:35:48,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:35:48 BoogieIcfgContainer [2020-12-09 12:35:48,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:35:48,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:35:48,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:35:48,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:35:48,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:35:48" (1/3) ... [2020-12-09 12:35:48,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f58c842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:35:48, skipping insertion in model container [2020-12-09 12:35:48,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:35:48" (2/3) ... [2020-12-09 12:35:48,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f58c842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:35:48, skipping insertion in model container [2020-12-09 12:35:48,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:35:48" (3/3) ... [2020-12-09 12:35:48,863 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2020-12-09 12:35:48,877 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:35:48,880 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 12:35:48,889 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 12:35:48,906 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:35:48,906 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:35:48,906 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:35:48,906 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:35:48,906 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:35:48,907 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:35:48,907 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:35:48,907 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:35:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-09 12:35:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:35:48,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:48,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:48,919 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:48,923 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2020-12-09 12:35:48,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:35:48,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70169216] [2020-12-09 12:35:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 12:35:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 12:35:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:49,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:35:49,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70169216] [2020-12-09 12:35:49,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:49,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:35:49,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212855559] [2020-12-09 12:35:49,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:35:49,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:35:49,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:35:49,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:35:49,055 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-09 12:35:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:49,066 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-12-09 12:35:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:35:49,067 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-09 12:35:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:49,073 INFO L225 Difference]: With dead ends: 45 [2020-12-09 12:35:49,073 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 12:35:49,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:35:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 12:35:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 12:35:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 12:35:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-09 12:35:49,100 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2020-12-09 12:35:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:49,100 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-09 12:35:49,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:35:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-09 12:35:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 12:35:49,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:49,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:49,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 12:35:49,302 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2020-12-09 12:35:49,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:35:49,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774497434] [2020-12-09 12:35:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 12:35:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 12:35:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:49,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:35:49,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774497434] [2020-12-09 12:35:49,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:49,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:35:49,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236315686] [2020-12-09 12:35:49,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:35:49,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:35:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:35:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:35:49,378 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2020-12-09 12:35:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:49,395 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-09 12:35:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:35:49,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 12:35:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:49,396 INFO L225 Difference]: With dead ends: 33 [2020-12-09 12:35:49,396 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 12:35:49,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:35:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 12:35:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 12:35:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 12:35:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 12:35:49,400 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2020-12-09 12:35:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:49,400 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 12:35:49,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:35:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 12:35:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 12:35:49,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:49,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:49,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 12:35:49,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2020-12-09 12:35:49,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:35:49,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496398474] [2020-12-09 12:35:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 12:35:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 12:35:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:49,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:35:49,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496398474] [2020-12-09 12:35:49,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:49,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 12:35:49,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456723504] [2020-12-09 12:35:49,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 12:35:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:35:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 12:35:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:35:49,832 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-12-09 12:35:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:50,139 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-09 12:35:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 12:35:50,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-09 12:35:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:50,141 INFO L225 Difference]: With dead ends: 40 [2020-12-09 12:35:50,141 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 12:35:50,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-09 12:35:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 12:35:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-09 12:35:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 12:35:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-09 12:35:50,146 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2020-12-09 12:35:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:50,146 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-09 12:35:50,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 12:35:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-09 12:35:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 12:35:50,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:50,147 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:50,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 12:35:50,349 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:50,351 INFO L82 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2020-12-09 12:35:50,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:35:50,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031796405] [2020-12-09 12:35:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 12:35:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 12:35:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:50,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:50,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031796405] [2020-12-09 12:35:50,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1661194156] [2020-12-09 12:35:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2020-12-09 12:35:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 12:35:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:50,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:50,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815605750] [2020-12-09 12:35:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 12:35:50,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:50,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:50,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:35:50,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 6] total 13 [2020-12-09 12:35:50,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508048096] [2020-12-09 12:35:50,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 12:35:50,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:35:50,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 12:35:50,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-09 12:35:50,781 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 14 states. [2020-12-09 12:35:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:51,059 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-12-09 12:35:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 12:35:51,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-12-09 12:35:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:51,060 INFO L225 Difference]: With dead ends: 116 [2020-12-09 12:35:51,060 INFO L226 Difference]: Without dead ends: 105 [2020-12-09 12:35:51,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-12-09 12:35:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-09 12:35:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 44. [2020-12-09 12:35:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 12:35:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-12-09 12:35:51,067 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 15 [2020-12-09 12:35:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:51,068 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-12-09 12:35:51,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 12:35:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-12-09 12:35:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 12:35:51,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:51,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:51,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:51,670 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:51,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2020-12-09 12:35:51,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:35:51,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377884181] [2020-12-09 12:35:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 12:35:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 12:35:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 12:35:51,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:35:51,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377884181] [2020-12-09 12:35:51,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:51,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:35:51,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874189739] [2020-12-09 12:35:51,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:35:51,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:35:51,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:35:51,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:35:51,809 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 4 states. [2020-12-09 12:35:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:51,908 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-12-09 12:35:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 12:35:51,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 12:35:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:51,909 INFO L225 Difference]: With dead ends: 63 [2020-12-09 12:35:51,909 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 12:35:51,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:35:51,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 12:35:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-12-09 12:35:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 12:35:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-12-09 12:35:51,914 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 16 [2020-12-09 12:35:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:51,914 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-12-09 12:35:51,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:35:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-12-09 12:35:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 12:35:51,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:51,915 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:52,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 12:35:52,117 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash -681488537, now seen corresponding path program 1 times [2020-12-09 12:35:52,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:35:52,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117742532] [2020-12-09 12:35:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 12:35:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 12:35:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:52,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:35:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117742532] [2020-12-09 12:35:52,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:35:52,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:35:52,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74244410] [2020-12-09 12:35:52,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:35:52,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:35:52,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:35:52,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:35:52,231 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 3 states. [2020-12-09 12:35:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:35:52,287 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-12-09 12:35:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:35:52,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-09 12:35:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:35:52,289 INFO L225 Difference]: With dead ends: 66 [2020-12-09 12:35:52,289 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 12:35:52,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:35:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 12:35:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-12-09 12:35:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 12:35:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-12-09 12:35:52,293 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 18 [2020-12-09 12:35:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:35:52,294 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-12-09 12:35:52,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:35:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-12-09 12:35:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 12:35:52,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:35:52,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:35:52,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 12:35:52,496 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:35:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:35:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2020-12-09 12:35:52,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:35:52,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216892928] [2020-12-09 12:35:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 12:35:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 12:35:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:52,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:35:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:52,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:54,601 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2020-12-09 12:35:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:54,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216892928] [2020-12-09 12:35:54,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710210319] [2020-12-09 12:35:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt [2020-12-09 12:35:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 12:35:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:55,012 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 12:35:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:55,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:56,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598057240] [2020-12-09 12:35:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:35:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:35:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 12:35:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:35:56,970 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-12-09 12:35:57,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:35:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:57,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:35:57,429 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:35:57,429 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:35:58,154 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 12:35:58,833 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 12:35:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:35:58,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:35:58,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7, 6, 13, 9] total 30 [2020-12-09 12:35:58,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953054318] [2020-12-09 12:35:58,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-09 12:35:58,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:35:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-09 12:35:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-12-09 12:35:58,898 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 30 states. [2020-12-09 12:36:03,662 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-12-09 12:36:03,831 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-12-09 12:36:08,024 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-12-09 12:36:10,096 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-12-09 12:36:13,058 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-09 12:36:13,852 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-12-09 12:36:14,756 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-12-09 12:36:15,746 WARN L197 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-09 12:36:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:36:18,025 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-12-09 12:36:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-09 12:36:18,026 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 21 [2020-12-09 12:36:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:36:18,026 INFO L225 Difference]: With dead ends: 101 [2020-12-09 12:36:18,027 INFO L226 Difference]: Without dead ends: 81 [2020-12-09 12:36:18,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=635, Invalid=1915, Unknown=0, NotChecked=0, Total=2550 [2020-12-09 12:36:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-09 12:36:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2020-12-09 12:36:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 12:36:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-12-09 12:36:18,033 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 21 [2020-12-09 12:36:18,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:36:18,033 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-12-09 12:36:18,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-09 12:36:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-12-09 12:36:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 12:36:18,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:36:18,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:36:18,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt [2020-12-09 12:36:18,637 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:36:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:36:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2020-12-09 12:36:18,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:36:18,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300221088] [2020-12-09 12:36:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 12:36:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:36:18,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 12:36:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:36:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:18,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:36:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:18,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300221088] [2020-12-09 12:36:18,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1995877548] [2020-12-09 12:36:18,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt [2020-12-09 12:36:19,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 12:36:19,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:36:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 12:36:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:36:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:36:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:19,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64433986] [2020-12-09 12:36:19,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:36:19,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 12:36:19,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:36:19,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 12:36:19,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:36:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:19,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:36:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:19,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:36:19,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 8, 6] total 16 [2020-12-09 12:36:19,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761434477] [2020-12-09 12:36:19,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 12:36:19,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:36:19,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 12:36:19,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-09 12:36:19,395 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 16 states. [2020-12-09 12:36:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:36:19,734 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-12-09 12:36:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 12:36:19,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-12-09 12:36:19,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:36:19,736 INFO L225 Difference]: With dead ends: 70 [2020-12-09 12:36:19,736 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 12:36:19,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-12-09 12:36:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 12:36:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-09 12:36:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 12:36:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-12-09 12:36:19,741 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2020-12-09 12:36:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:36:19,741 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-12-09 12:36:19,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 12:36:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-12-09 12:36:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 12:36:19,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:36:19,742 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:36:20,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt,13 mathsat -unsat_core_generation=3,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:36:20,346 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:36:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:36:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2020-12-09 12:36:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:36:20,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266238053] [2020-12-09 12:36:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 12:36:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:36:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 12:36:20,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:36:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:20,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:36:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:20,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266238053] [2020-12-09 12:36:20,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [329577915] [2020-12-09 12:36:20,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt [2020-12-09 12:36:20,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 12:36:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:36:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 12:36:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:36:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:20,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:36:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:20,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291583801] [2020-12-09 12:36:20,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:36:45,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 12:36:45,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:36:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 12:36:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:36:46,428 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-12-09 12:36:47,312 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-09 12:36:47,858 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 12:36:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:36:47,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:36:52,332 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:36:52,332 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:36:53,179 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 12:36:55,518 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 12:36:56,991 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-09 12:36:58,191 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-09 12:36:58,197 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:36:58,197 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:37:00,207 WARN L197 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-09 12:37:01,982 WARN L197 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-09 12:37:04,365 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-09 12:37:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:37:04,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:37:04,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 14, 14] total 40 [2020-12-09 12:37:04,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482282606] [2020-12-09 12:37:04,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-09 12:37:04,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:37:04,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-09 12:37:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 12:37:04,470 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 40 states. [2020-12-09 12:37:11,896 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-09 12:37:16,044 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-09 12:37:18,054 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-09 12:37:18,997 WARN L197 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-09 12:37:20,992 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-09 12:37:22,004 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-12-09 12:37:40,620 WARN L197 SmtUtils]: Spent 5.36 s on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-09 12:37:48,224 WARN L197 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-12-09 12:37:53,046 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-12-09 12:38:06,423 WARN L197 SmtUtils]: Spent 10.43 s on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-12-09 12:38:07,532 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-12-09 12:38:12,620 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 12:38:13,598 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-12-09 12:38:30,500 WARN L197 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-12-09 12:38:38,947 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-09 12:38:47,418 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-12-09 12:38:57,817 WARN L197 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-12-09 12:39:05,406 WARN L197 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-12-09 12:39:18,552 WARN L197 SmtUtils]: Spent 3.03 s on a formula simplification that was a NOOP. DAG size: 49 [2020-12-09 12:39:21,309 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 12:39:24,653 WARN L197 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-09 12:39:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:39:24,706 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2020-12-09 12:39:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-09 12:39:24,709 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 29 [2020-12-09 12:39:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:39:24,709 INFO L225 Difference]: With dead ends: 195 [2020-12-09 12:39:24,709 INFO L226 Difference]: Without dead ends: 134 [2020-12-09 12:39:24,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 122.2s TimeCoverageRelationStatistics Valid=2210, Invalid=11362, Unknown=0, NotChecked=0, Total=13572 [2020-12-09 12:39:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-09 12:39:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-12-09 12:39:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-09 12:39:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-12-09 12:39:24,726 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 29 [2020-12-09 12:39:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:39:24,726 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-12-09 12:39:24,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-09 12:39:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-12-09 12:39:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 12:39:24,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:39:24,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:39:25,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt [2020-12-09 12:39:25,330 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:39:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:39:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2031166962, now seen corresponding path program 1 times [2020-12-09 12:39:25,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:39:25,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895313389] [2020-12-09 12:39:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-12-09 12:39:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:39:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 12:39:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:39:27,372 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 12:39:27,816 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-12-09 12:39:28,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 12:39:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:39:28,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:39:32,071 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:39:32,071 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:39:32,721 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 12:39:35,255 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 12:39:35,981 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-09 12:39:36,888 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-09 12:39:38,271 WARN L197 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-09 12:39:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:39:38,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895313389] [2020-12-09 12:39:38,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385637509] [2020-12-09 12:39:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt [2020-12-09 12:39:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:39:38,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 12:39:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:39:45,180 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 12:39:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:39:46,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:39:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:39:55,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851484087] [2020-12-09 12:39:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:39:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:39:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 12:39:57,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:40:06,262 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-12-09 12:40:18,675 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-09 12:40:23,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 12:40:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:40:23,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:40:23,622 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:40:23,622 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:40:24,858 WARN L197 SmtUtils]: Spent 590.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-09 12:40:24,863 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:40:24,863 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:40:26,398 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-09 12:40:28,485 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-09 12:40:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:40:29,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:40:29,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10, 9, 14, 14] total 43 [2020-12-09 12:40:29,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940053698] [2020-12-09 12:40:29,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-09 12:40:29,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:40:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-09 12:40:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1406, Unknown=11, NotChecked=0, Total=1806 [2020-12-09 12:40:29,901 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 43 states. [2020-12-09 12:40:42,818 WARN L197 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 12:40:47,365 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-09 12:40:48,610 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-09 12:40:50,580 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-12-09 12:40:53,692 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-09 12:41:16,426 WARN L197 SmtUtils]: Spent 19.70 s on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-12-09 12:41:32,544 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 12:41:37,417 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 12:41:46,922 WARN L197 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-12-09 12:41:56,316 WARN L197 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-12-09 12:42:07,466 WARN L197 SmtUtils]: Spent 3.76 s on a formula simplification that was a NOOP. DAG size: 49 [2020-12-09 12:42:15,486 WARN L197 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-12-09 12:42:17,413 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-09 12:42:23,938 WARN L197 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-12-09 12:42:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:42:24,381 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2020-12-09 12:42:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-09 12:42:24,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 30 [2020-12-09 12:42:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:42:24,383 INFO L225 Difference]: With dead ends: 149 [2020-12-09 12:42:24,383 INFO L226 Difference]: Without dead ends: 129 [2020-12-09 12:42:24,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 135.0s TimeCoverageRelationStatistics Valid=1039, Invalid=4647, Unknown=14, NotChecked=0, Total=5700 [2020-12-09 12:42:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-09 12:42:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 87. [2020-12-09 12:42:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-09 12:42:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2020-12-09 12:42:24,393 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 30 [2020-12-09 12:42:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:42:24,393 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2020-12-09 12:42:24,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-09 12:42:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2020-12-09 12:42:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-09 12:42:24,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:42:24,395 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:42:24,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt [2020-12-09 12:42:24,998 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:42:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:42:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2011707774, now seen corresponding path program 1 times [2020-12-09 12:42:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:42:25,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471250570] [2020-12-09 12:42:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-12-09 12:42:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:42:25,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 12:42:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:42:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-09 12:42:25,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:42:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-09 12:42:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471250570] [2020-12-09 12:42:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [583720782] [2020-12-09 12:42:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt [2020-12-09 12:42:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:42:25,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 12:42:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:42:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-09 12:42:25,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:42:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-09 12:42:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502391003] [2020-12-09 12:42:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11b77adc-45cd-45e2-8528-4c0794167054/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:42:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:42:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-09 12:42:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:44:28,882 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-09 12:45:10,964 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-09 12:45:14,125 WARN L197 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-12-09 12:45:15,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 15 disjuncts [2020-12-09 12:45:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 82 refuted. 129 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:45:15,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:45:29,761 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:45:29,762 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:45:32,883 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 12:45:35,574 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 12:45:37,647 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-09 12:45:39,632 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-09 12:45:39,636 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:45:39,636 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:45:42,272 WARN L197 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-09 12:45:45,707 WARN L197 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-09 12:45:48,939 WARN L197 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 12:45:51,953 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-09 12:45:51,958 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:45:51,958 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:45:57,775 WARN L197 SmtUtils]: Spent 3.22 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-09 12:46:07,277 WARN L197 SmtUtils]: Spent 6.50 s on a formula simplification that was a NOOP. DAG size: 62 [2020-12-09 12:46:19,860 WARN L197 SmtUtils]: Spent 9.45 s on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-09 12:46:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 72 proven. 31 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-09 12:46:20,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 12:46:20,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 28, 18] total 58 [2020-12-09 12:46:20,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594421776] [2020-12-09 12:46:20,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-09 12:46:20,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:46:20,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-09 12:46:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2792, Unknown=66, NotChecked=0, Total=3306 [2020-12-09 12:46:20,126 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand 58 states. [2020-12-09 12:47:44,443 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-12-09 12:47:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:47:44,444 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-12-09 12:47:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 12:47:44,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 60 [2020-12-09 12:47:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:47:44,445 INFO L225 Difference]: With dead ends: 87 [2020-12-09 12:47:44,445 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 12:47:44,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 273.8s TimeCoverageRelationStatistics Valid=763, Invalid=4555, Unknown=84, NotChecked=0, Total=5402 [2020-12-09 12:47:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 12:47:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 12:47:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 12:47:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 12:47:44,447 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2020-12-09 12:47:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:47:44,447 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 12:47:44,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-09 12:47:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 12:47:44,447 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 12:47:45,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 cvc4 --incremental --print-success --lang smt,22 mathsat -unsat_core_generation=3,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:47:45,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 12:47:50,149 WARN L197 SmtUtils]: Spent 4.97 s on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-12-09 12:47:53,458 WARN L197 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 109 DAG size of output: 85 [2020-12-09 12:47:53,461 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-12-09 12:47:53,461 INFO L262 CegarLoopResult]: For program point L19(lines 19 22) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L258 CegarLoopResult]: At program point L19-2(line 42) the Hoare annotation is: (let ((.cse1 (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (.cse2 (bvult ULTIMATE.start_main_~B~0 (_ bv2147483647 32))) (.cse3 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse8 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0)) (.cse4 (bvuge ULTIMATE.start_main_~B~0 (_ bv1 32))) (.cse7 (exists ((v_ULTIMATE.start_main_~b~0_30 (_ BitVec 32))) (= ULTIMATE.start_main_~b~0 (bvudiv (bvmul v_ULTIMATE.start_main_~b~0_30 (_ bv2 32)) (_ bv2 32)))))) (let ((.cse0 (= (bvadd (bvneg ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~A~0) ULTIMATE.start_main_~r~0)) (.cse6 (= (_ bv1 32) ULTIMATE.start_main_~q~0)) (.cse10 (= (bvadd ~counter~0 (_ bv4294967291 32)) (_ bv0 32))) (.cse13 (or (and .cse1 .cse2 .cse3 (exists ((v_ULTIMATE.start_main_~b~0_30 (_ BitVec 32))) (= ULTIMATE.start_main_~b~0 (bvmul v_ULTIMATE.start_main_~b~0_30 (_ bv2 32)))) .cse8 .cse4) (and .cse1 .cse2 .cse3 .cse8 .cse4 .cse7))) (.cse12 (not (bvuge ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0))) (.cse5 (bvmul ULTIMATE.start_main_~B~0 (_ bv2 32))) (.cse9 (= (_ bv0 32) ULTIMATE.start_main_~q~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (bvudiv .cse5 (_ bv2 32))) .cse6 .cse7) (and .cse1 .cse2 .cse8 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) .cse9) (and .cse0 .cse10 .cse1 .cse2 .cse3 .cse4 (exists ((v_ULTIMATE.start_main_~b~0_99 (_ BitVec 32))) (let ((.cse11 (bvmul v_ULTIMATE.start_main_~b~0_99 (_ bv4 32)))) (and (bvuge ULTIMATE.start_main_~A~0 (bvmul v_ULTIMATE.start_main_~b~0_99 (_ bv2 32))) (= (bvudiv .cse11 (_ bv2 32)) ULTIMATE.start_main_~b~0) (bvuge ULTIMATE.start_main_~A~0 v_ULTIMATE.start_main_~b~0_99) (not (bvuge ULTIMATE.start_main_~A~0 .cse11))))) .cse6 .cse7) (and .cse12 (exists ((v_ULTIMATE.start_main_~b~0_99 (_ BitVec 32))) (and (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_99 (_ bv2 32))) (= ULTIMATE.start_main_~b~0 (bvmul v_ULTIMATE.start_main_~b~0_99 (_ bv4 32))) (bvuge ULTIMATE.start_main_~r~0 v_ULTIMATE.start_main_~b~0_99))) .cse13 .cse9 (= (_ bv4 32) ~counter~0)) (and .cse12 .cse10 .cse13 (exists ((v_ULTIMATE.start_main_~b~0_74 (_ BitVec 32))) (and (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_74 (_ bv2 32))) (= ULTIMATE.start_main_~b~0 (bvmul v_ULTIMATE.start_main_~b~0_74 (_ bv4 32))))) .cse9) (and .cse12 .cse1 .cse3 .cse8 (= ULTIMATE.start_main_~b~0 .cse5) .cse9 (bvult ULTIMATE.start_main_~B~0 ULTIMATE.start_main_~b~0) (exists ((v_ULTIMATE.start_main_~b~0_25 (_ BitVec 32))) (and (bvult v_ULTIMATE.start_main_~b~0_25 (_ bv2147483647 32)) (= (bvmul v_ULTIMATE.start_main_~b~0_25 (_ bv2 32)) ULTIMATE.start_main_~b~0) (bvuge ULTIMATE.start_main_~r~0 v_ULTIMATE.start_main_~b~0_25))))))) [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L265 CegarLoopResult]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point L40(lines 40 49) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L258 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse0 (bvult ULTIMATE.start_main_~B~0 (_ bv2147483647 32))) (.cse1 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse2 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0)) (.cse3 (bvuge ULTIMATE.start_main_~B~0 (_ bv1 32))) (.cse4 (= (_ bv0 32) ULTIMATE.start_main_~q~0))) (or (and .cse0 .cse1 .cse2 (exists ((v_ULTIMATE.start_main_~b~0_139 (_ BitVec 32))) (and (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv2 32))) (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv8 32))) (= (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv16 32)) ULTIMATE.start_main_~b~0) (bvuge v_ULTIMATE.start_main_~b~0_139 (_ bv1 32)) (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv4 32))) (bvult v_ULTIMATE.start_main_~b~0_139 (_ bv2147483647 32)))) .cse3 .cse4 (= (_ bv4 32) ~counter~0)) (and (= (bvadd ~counter~0 (_ bv4294967291 32)) (_ bv0 32)) (exists ((v_ULTIMATE.start_main_~b~0_139 (_ BitVec 32))) (and (= (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv32 32)) ULTIMATE.start_main_~b~0) (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv2 32))) (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv8 32))) (bvuge v_ULTIMATE.start_main_~b~0_139 (_ bv1 32)) (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv4 32))) (bvult v_ULTIMATE.start_main_~b~0_139 (_ bv2147483647 32)) (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv16 32))))) .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 (exists ((v_ULTIMATE.start_main_~b~0_139 (_ BitVec 32))) (and (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv2 32))) (= (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv8 32)) ULTIMATE.start_main_~b~0) (bvuge v_ULTIMATE.start_main_~b~0_139 (_ bv1 32)) (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv4 32))) (bvult v_ULTIMATE.start_main_~b~0_139 (_ bv2147483647 32)))) .cse2 (= (_ bv3 32) ~counter~0) .cse3 .cse4) (and (= (_ bv2 32) ~counter~0) .cse0 .cse1 (exists ((v_ULTIMATE.start_main_~b~0_139 (_ BitVec 32))) (and (bvuge ULTIMATE.start_main_~r~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv2 32))) (= ULTIMATE.start_main_~b~0 (bvmul v_ULTIMATE.start_main_~b~0_139 (_ bv4 32))) (bvuge v_ULTIMATE.start_main_~b~0_139 (_ bv1 32)) (bvult v_ULTIMATE.start_main_~b~0_139 (_ bv2147483647 32)))) .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~b~0 (bvmul ULTIMATE.start_main_~B~0 (_ bv2 32))) (= (_ bv1 32) ~counter~0) .cse4 (exists ((v_ULTIMATE.start_main_~b~0_35 (_ BitVec 32))) (and (bvuge v_ULTIMATE.start_main_~b~0_35 (_ bv1 32)) (bvuge ULTIMATE.start_main_~r~0 v_ULTIMATE.start_main_~b~0_35) (bvult v_ULTIMATE.start_main_~b~0_35 (_ bv2147483647 32)) (= (bvmul v_ULTIMATE.start_main_~b~0_35 (_ bv2 32)) ULTIMATE.start_main_~b~0)))) (and .cse1 (= (_ bv0 32) ~counter~0) .cse2 .cse3 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) .cse4 (bvult ULTIMATE.start_main_~b~0 (_ bv2147483647 32))))) [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 12:47:53,462 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point L20(lines 20 21) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point L45(lines 45 48) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point L45-2(lines 26 52) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 12:47:53,463 INFO L265 CegarLoopResult]: At program point L51(lines 26 52) the Hoare annotation is: true [2020-12-09 12:47:53,466 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: translation of (bvneg (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:796) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:283) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:240) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 12:47:53,468 INFO L168 Benchmark]: Toolchain (without parser) took 725138.33 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 36.1 MB in the beginning and 23.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-12-09 12:47:53,468 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 39.2 MB in the end (delta: 81.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:47:53,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.05 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 40.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 12:47:53,469 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.66 ms. Allocated memory is still 56.6 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:47:53,469 INFO L168 Benchmark]: Boogie Preprocessor took 24.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 38.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:47:53,469 INFO L168 Benchmark]: RCFGBuilder took 268.48 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 37.8 MB in the beginning and 54.1 MB in the end (delta: -16.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:47:53,469 INFO L168 Benchmark]: TraceAbstraction took 724610.39 ms. Allocated memory is still 71.3 MB. Free memory was 53.8 MB in the beginning and 23.3 MB in the end (delta: 30.4 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:47:53,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 39.2 MB in the end (delta: 81.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.05 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 40.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.66 ms. Allocated memory is still 56.6 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 38.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 268.48 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 37.8 MB in the beginning and 54.1 MB in the end (delta: -16.2 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 724610.39 ms. Allocated memory is still 71.3 MB. Free memory was 53.8 MB in the beginning and 23.3 MB in the end (delta: 30.4 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvneg (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: translation of (bvneg (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...