./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs --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_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs --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 0.2.1-dev-5709675 [2021-10-16 02:08:08,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:08:08,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:08:08,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:08:08,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:08:08,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:08:08,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:08:08,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:08:08,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:08:08,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:08:08,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:08:08,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:08:08,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:08:08,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:08:08,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:08:08,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:08:08,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:08:08,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:08:08,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:08:08,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:08:08,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:08:08,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:08:08,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:08:08,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:08:08,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:08:08,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:08:08,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:08:08,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:08:08,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:08:08,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:08:08,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:08:08,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:08:08,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:08:08,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:08:08,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:08:08,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:08:08,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:08:08,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:08:08,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:08:08,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:08:08,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:08:08,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:08:08,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:08:08,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:08:08,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:08:08,922 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:08:08,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:08:08,922 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:08:08,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:08:08,923 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:08:08,923 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:08:08,923 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:08:08,932 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:08:08,933 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:08:08,933 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:08:08,933 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:08:08,934 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:08:08,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:08:08,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:08:08,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:08:08,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:08:08,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:08:08,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:08:08,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:08:08,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:08:08,937 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:08:08,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:08:08,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:08:08,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:08:08,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:08:08,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:08:08,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:08:08,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:08:08,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:08:08,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:08:08,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:08:08,943 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:08:08,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:08:08,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:08:08,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:08:08,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:08:08,944 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 909b1dc421a216ac8a75bed7ba3ab31ab21b81a7 [2021-10-16 02:08:09,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:08:09,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:08:09,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:08:09,329 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:08:09,330 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:08:09,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-10-16 02:08:09,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/1dcb4fad4/53939275444449edbcb0c0d01e8510bc/FLAG1707bd3dd [2021-10-16 02:08:10,001 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:08:10,006 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-10-16 02:08:10,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/1dcb4fad4/53939275444449edbcb0c0d01e8510bc/FLAG1707bd3dd [2021-10-16 02:08:10,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/1dcb4fad4/53939275444449edbcb0c0d01e8510bc [2021-10-16 02:08:10,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:08:10,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:08:10,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:08:10,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:08:10,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:08:10,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2026eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10, skipping insertion in model container [2021-10-16 02:08:10,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:08:10,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:08:10,596 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-10-16 02:08:10,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:08:10,644 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:08:10,664 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-10-16 02:08:10,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:08:10,695 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:08:10,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10 WrapperNode [2021-10-16 02:08:10,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:08:10,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:08:10,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:08:10,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:08:10,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:08:10,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:08:10,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:08:10,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:08:10,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:08:10,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:08:10,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:08:10,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:08:10,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (1/1) ... [2021-10-16 02:08:10,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:08:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:10,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:08:10,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:08:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:08:10,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:08:10,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:08:10,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:08:11,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:08:11,366 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-16 02:08:11,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:08:11 BoogieIcfgContainer [2021-10-16 02:08:11,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:08:11,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:08:11,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:08:11,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:08:11,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:08:10" (1/3) ... [2021-10-16 02:08:11,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a47e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:08:11, skipping insertion in model container [2021-10-16 02:08:11,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:10" (2/3) ... [2021-10-16 02:08:11,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a47e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:08:11, skipping insertion in model container [2021-10-16 02:08:11,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:08:11" (3/3) ... [2021-10-16 02:08:11,388 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2021-10-16 02:08:11,395 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:08:11,395 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:08:11,474 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:08:11,484 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:08:11,487 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:08:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:08:11,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:11,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:08:11,513 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:11,535 INFO L82 PathProgramCache]: Analyzing trace with hash -769700853, now seen corresponding path program 1 times [2021-10-16 02:08:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:11,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141133658] [2021-10-16 02:08:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:11,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:11,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141133658] [2021-10-16 02:08:11,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141133658] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:11,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:11,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:08:11,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93216757] [2021-10-16 02:08:11,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:08:11,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:11,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:08:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:08:11,779 INFO L87 Difference]: Start difference. First operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:11,798 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-10-16 02:08:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:08:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:08:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:11,810 INFO L225 Difference]: With dead ends: 28 [2021-10-16 02:08:11,811 INFO L226 Difference]: Without dead ends: 14 [2021-10-16 02:08:11,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:08:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-16 02:08:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-16 02:08:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-16 02:08:11,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2021-10-16 02:08:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:11,900 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-16 02:08:11,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-16 02:08:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:08:11,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:11,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:11,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:08:11,902 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1525818212, now seen corresponding path program 1 times [2021-10-16 02:08:11,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:11,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207133068] [2021-10-16 02:08:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:11,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:12,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:12,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207133068] [2021-10-16 02:08:12,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207133068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:12,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:12,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:08:12,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226385400] [2021-10-16 02:08:12,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:08:12,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:08:12,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:08:12,024 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:12,047 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-10-16 02:08:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:08:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:08:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:12,049 INFO L225 Difference]: With dead ends: 26 [2021-10-16 02:08:12,049 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 02:08:12,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:08:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 02:08:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 02:08:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-16 02:08:12,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2021-10-16 02:08:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:12,057 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-16 02:08:12,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-16 02:08:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:08:12,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:12,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:12,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:08:12,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:12,060 INFO L82 PathProgramCache]: Analyzing trace with hash 104519077, now seen corresponding path program 1 times [2021-10-16 02:08:12,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:12,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459936097] [2021-10-16 02:08:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:12,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:12,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:08:12,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481249800] [2021-10-16 02:08:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:12,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:12,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:12,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:12,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:08:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:08:12,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:12,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:12,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:12,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459936097] [2021-10-16 02:08:12,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:08:12,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481249800] [2021-10-16 02:08:12,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481249800] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:12,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:12,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:08:12,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661799650] [2021-10-16 02:08:12,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:08:12,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:08:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:08:12,642 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:19,630 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-10-16 02:08:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:08:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:08:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:19,634 INFO L225 Difference]: With dead ends: 52 [2021-10-16 02:08:19,635 INFO L226 Difference]: Without dead ends: 42 [2021-10-16 02:08:19,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:08:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-16 02:08:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2021-10-16 02:08:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-16 02:08:19,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 8 [2021-10-16 02:08:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:19,643 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-16 02:08:19,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-10-16 02:08:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:08:19,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:19,645 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:19,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:19,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:19,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash 653378868, now seen corresponding path program 1 times [2021-10-16 02:08:19,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:19,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000178210] [2021-10-16 02:08:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:19,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:19,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:08:19,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648972319] [2021-10-16 02:08:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:19,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:19,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:19,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:08:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:08:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:20,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:20,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:20,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000178210] [2021-10-16 02:08:20,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:08:20,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648972319] [2021-10-16 02:08:20,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648972319] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:20,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:08:20,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381102358] [2021-10-16 02:08:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:08:20,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:08:20,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:08:20,181 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:20,240 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-10-16 02:08:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:08:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:08:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:20,243 INFO L225 Difference]: With dead ends: 42 [2021-10-16 02:08:20,243 INFO L226 Difference]: Without dead ends: 28 [2021-10-16 02:08:20,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:08:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-16 02:08:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-10-16 02:08:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-16 02:08:20,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2021-10-16 02:08:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:20,251 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-16 02:08:20,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-16 02:08:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:08:20,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:20,254 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:20,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:20,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:20,456 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1136214436, now seen corresponding path program 1 times [2021-10-16 02:08:20,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:20,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506732608] [2021-10-16 02:08:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:20,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:20,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:08:20,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368805682] [2021-10-16 02:08:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:20,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:20,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:20,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:20,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:08:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:08:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:20,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:20,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:20,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506732608] [2021-10-16 02:08:20,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:08:20,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368805682] [2021-10-16 02:08:20,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368805682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:08:20,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843844302] [2021-10-16 02:08:20,856 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 02:08:20,856 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:08:20,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:08:20,868 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:08:20,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:08:20,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:20,916 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:08:20,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:20,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 02:08:20,922 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:08:20,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:20,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:08:20,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-10-16 02:08:20,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:08:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:08:21,045 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 02:08:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:08:21,048 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:21,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:08:21,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:21,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:08:21,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:08:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:08:21,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:08:21,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:21,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:08:21,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:21,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:08:21,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:08:21,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:08:21,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:21,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:08:21,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-10-16 02:08:21,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:08:21,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:238, output treesize:106 [2021-10-16 02:08:21,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:21,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:21,353 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_24| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:08:21,357 INFO L168 Benchmark]: Toolchain (without parser) took 11034.31 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 61.5 MB in the beginning and 61.8 MB in the end (delta: -266.7 kB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:08:21,358 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory was 66.6 MB in the beginning and 66.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:08:21,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.09 ms. Allocated memory is still 96.5 MB. Free memory was 61.3 MB in the beginning and 72.4 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:08:21,359 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.92 ms. Allocated memory is still 96.5 MB. Free memory was 72.4 MB in the beginning and 71.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:08:21,359 INFO L168 Benchmark]: Boogie Preprocessor took 37.81 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 69.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:08:21,360 INFO L168 Benchmark]: RCFGBuilder took 580.18 ms. Allocated memory is still 96.5 MB. Free memory was 69.7 MB in the beginning and 55.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:08:21,361 INFO L168 Benchmark]: TraceAbstraction took 9984.48 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 55.1 MB in the beginning and 61.8 MB in the end (delta: -6.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:08:21,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory was 66.6 MB in the beginning and 66.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 368.09 ms. Allocated memory is still 96.5 MB. Free memory was 61.3 MB in the beginning and 72.4 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.92 ms. Allocated memory is still 96.5 MB. Free memory was 72.4 MB in the beginning and 71.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.81 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 69.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 580.18 ms. Allocated memory is still 96.5 MB. Free memory was 69.7 MB in the beginning and 55.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9984.48 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 55.1 MB in the beginning and 61.8 MB in the end (delta: -6.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_24| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_24|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:08:21,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:08:24,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:08:24,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:08:24,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:08:24,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:08:24,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:08:24,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:08:24,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:08:24,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:08:24,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:08:24,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:08:24,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:08:24,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:08:24,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:08:24,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:08:24,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:08:24,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:08:24,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:08:24,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:08:24,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:08:24,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:08:24,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:08:24,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:08:24,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:08:24,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:08:24,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:08:24,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:08:24,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:08:24,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:08:24,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:08:24,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:08:24,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:08:24,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:08:24,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:08:24,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:08:24,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:08:24,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:08:24,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:08:24,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:08:24,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:08:24,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:08:24,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:08:24,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:08:24,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:08:24,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:08:24,582 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:08:24,583 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:08:24,583 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:08:24,583 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:08:24,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:08:24,583 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:08:24,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:08:24,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:08:24,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:08:24,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:08:24,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:08:24,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:08:24,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:08:24,586 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:08:24,586 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:08:24,587 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:08:24,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:08:24,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:08:24,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:08:24,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:08:24,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:08:24,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:08:24,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:08:24,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:08:24,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:08:24,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:08:24,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:08:24,590 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:08:24,590 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:08:24,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:08:24,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:08:24,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:08:24,591 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 909b1dc421a216ac8a75bed7ba3ab31ab21b81a7 [2021-10-16 02:08:25,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:08:25,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:08:25,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:08:25,058 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:08:25,059 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:08:25,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-10-16 02:08:25,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/418e9ff24/0eba32c9029a4eb39504a78347c3f0a6/FLAGbf1bcb68b [2021-10-16 02:08:25,852 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:08:25,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-10-16 02:08:25,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/418e9ff24/0eba32c9029a4eb39504a78347c3f0a6/FLAGbf1bcb68b [2021-10-16 02:08:26,185 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/data/418e9ff24/0eba32c9029a4eb39504a78347c3f0a6 [2021-10-16 02:08:26,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:08:26,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:08:26,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:08:26,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:08:26,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:08:26,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c43a97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26, skipping insertion in model container [2021-10-16 02:08:26,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:08:26,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:08:26,396 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-10-16 02:08:26,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:08:26,432 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:08:26,473 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-10-16 02:08:26,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:08:26,538 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:08:26,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26 WrapperNode [2021-10-16 02:08:26,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:08:26,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:08:26,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:08:26,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:08:26,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:08:26,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:08:26,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:08:26,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:08:26,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:08:26,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:08:26,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:08:26,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:08:26,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (1/1) ... [2021-10-16 02:08:26,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:08:26,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:26,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:08:26,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:08:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:08:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:08:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:08:26,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:08:27,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:08:27,087 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-16 02:08:27,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:08:27 BoogieIcfgContainer [2021-10-16 02:08:27,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:08:27,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:08:27,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:08:27,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:08:27,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:08:26" (1/3) ... [2021-10-16 02:08:27,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce79d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:08:27, skipping insertion in model container [2021-10-16 02:08:27,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:08:26" (2/3) ... [2021-10-16 02:08:27,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce79d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:08:27, skipping insertion in model container [2021-10-16 02:08:27,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:08:27" (3/3) ... [2021-10-16 02:08:27,127 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2021-10-16 02:08:27,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:08:27,148 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:08:27,258 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:08:27,279 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:08:27,279 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:08:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:08:27,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:27,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:27,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2021-10-16 02:08:27,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:08:27,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154888501] [2021-10-16 02:08:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:27,365 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:08:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:08:27,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:08:27,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:08:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:27,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:08:27,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:27,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:27,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:08:27,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154888501] [2021-10-16 02:08:27,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154888501] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:27,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:27,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:08:27,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696912669] [2021-10-16 02:08:27,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:08:27,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:08:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:08:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:08:27,722 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:27,740 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-10-16 02:08:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:08:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:08:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:27,753 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:08:27,753 INFO L226 Difference]: Without dead ends: 20 [2021-10-16 02:08:27,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:08:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-16 02:08:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-16 02:08:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-16 02:08:27,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-10-16 02:08:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:27,796 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-16 02:08:27,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:27,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-16 02:08:27,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:08:27,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:27,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:27,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:08:28,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:08:28,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2021-10-16 02:08:28,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:08:28,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086208152] [2021-10-16 02:08:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:28,026 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:08:28,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:08:28,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:08:28,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:08:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:08:28,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:28,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:28,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:08:28,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086208152] [2021-10-16 02:08:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086208152] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:28,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:28,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:08:28,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043067443] [2021-10-16 02:08:28,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:08:28,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:08:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:08:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:28,367 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:28,433 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-10-16 02:08:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:08:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:08:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:28,438 INFO L225 Difference]: With dead ends: 37 [2021-10-16 02:08:28,438 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:08:28,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:08:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:08:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-16 02:08:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-16 02:08:28,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2021-10-16 02:08:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:28,459 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-16 02:08:28,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-16 02:08:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:08:28,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:28,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:28,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:28,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:08:28,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:28,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2021-10-16 02:08:28,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:08:28,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324219984] [2021-10-16 02:08:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:28,679 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:08:28,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:08:28,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:08:28,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:08:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:08:28,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:29,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:30,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:08:30,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324219984] [2021-10-16 02:08:30,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324219984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:30,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:30,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-10-16 02:08:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777856134] [2021-10-16 02:08:30,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:08:30,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:08:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:08:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:08:30,363 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:32,146 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-10-16 02:08:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:08:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:08:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:32,151 INFO L225 Difference]: With dead ends: 56 [2021-10-16 02:08:32,151 INFO L226 Difference]: Without dead ends: 46 [2021-10-16 02:08:32,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1567.3ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:08:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-16 02:08:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-10-16 02:08:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-10-16 02:08:32,161 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 13 [2021-10-16 02:08:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:32,162 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-10-16 02:08:32,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-10-16 02:08:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:08:32,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:32,164 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:32,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:32,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:08:32,377 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:32,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1639218671, now seen corresponding path program 1 times [2021-10-16 02:08:32,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:08:32,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358694376] [2021-10-16 02:08:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:32,379 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:08:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:08:32,383 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:08:32,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:08:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:32,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:08:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:32,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:32,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:08:32,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358694376] [2021-10-16 02:08:32,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358694376] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:08:32,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1941028150] [2021-10-16 02:08:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:32,827 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:08:32,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:08:32,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:08:32,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 02:08:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:32,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:08:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:33,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:33,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1941028150] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:08:33,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733896603] [2021-10-16 02:08:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:33,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:33,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:33,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 02:08:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:33,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:08:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:33,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:33,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733896603] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:08:33,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:08:33,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-16 02:08:33,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107073129] [2021-10-16 02:08:33,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:08:33,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:08:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:08:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:08:33,507 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:33,703 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2021-10-16 02:08:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:08:33,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:08:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:33,706 INFO L225 Difference]: With dead ends: 92 [2021-10-16 02:08:33,706 INFO L226 Difference]: Without dead ends: 81 [2021-10-16 02:08:33,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:08:33,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-16 02:08:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-10-16 02:08:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-10-16 02:08:33,721 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 18 [2021-10-16 02:08:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:33,722 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-10-16 02:08:33,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-10-16 02:08:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:08:33,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:33,724 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:33,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:33,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:34,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:34,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:08:34,344 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash 772623512, now seen corresponding path program 1 times [2021-10-16 02:08:34,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:08:34,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711540966] [2021-10-16 02:08:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:34,345 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:08:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:08:34,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:08:34,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:08:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:34,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:08:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:08:34,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:08:35,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:08:35,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711540966] [2021-10-16 02:08:35,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711540966] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:35,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:35,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-16 02:08:35,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330831458] [2021-10-16 02:08:35,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:08:35,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:08:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:08:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:08:35,006 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:35,265 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-10-16 02:08:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:08:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-16 02:08:35,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:35,267 INFO L225 Difference]: With dead ends: 66 [2021-10-16 02:08:35,267 INFO L226 Difference]: Without dead ends: 59 [2021-10-16 02:08:35,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-16 02:08:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-10-16 02:08:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-10-16 02:08:35,277 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 19 [2021-10-16 02:08:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:35,277 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-10-16 02:08:35,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-10-16 02:08:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:08:35,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:35,279 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:35,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:35,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:08:35,494 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2021-10-16 02:08:35,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:08:35,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874514406] [2021-10-16 02:08:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:35,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:08:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:08:35,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:08:35,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:08:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:08:35,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:36,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:40,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:08:40,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874514406] [2021-10-16 02:08:40,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874514406] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:08:40,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887707072] [2021-10-16 02:08:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:40,894 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:08:40,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:08:40,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:08:40,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:08:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:08:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:44,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:46,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887707072] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:08:46,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432202303] [2021-10-16 02:08:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:46,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:46,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:46,051 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:46,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:08:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:46,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:08:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:49,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:08:53,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432202303] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:08:53,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:08:53,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7, 6, 13, 9] total 30 [2021-10-16 02:08:53,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106751138] [2021-10-16 02:08:53,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-16 02:08:53,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:08:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-16 02:08:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=661, Unknown=1, NotChecked=0, Total=870 [2021-10-16 02:08:53,008 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:12,458 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2021-10-16 02:09:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 02:09:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:09:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:12,461 INFO L225 Difference]: With dead ends: 109 [2021-10-16 02:09:12,462 INFO L226 Difference]: Without dead ends: 89 [2021-10-16 02:09:12,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 18098.6ms TimeCoverageRelationStatistics Valid=635, Invalid=1914, Unknown=1, NotChecked=0, Total=2550 [2021-10-16 02:09:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-16 02:09:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 48. [2021-10-16 02:09:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-10-16 02:09:12,475 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 21 [2021-10-16 02:09:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:12,475 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-10-16 02:09:12,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-10-16 02:09:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:09:12,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:12,477 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:12,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:12,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-16 02:09:12,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:13,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:13,098 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 953704056, now seen corresponding path program 1 times [2021-10-16 02:09:13,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:13,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702196756] [2021-10-16 02:09:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:13,099 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:13,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:13,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:13,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:09:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:13,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:13,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:09:13,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:09:13,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:13,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702196756] [2021-10-16 02:09:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702196756] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:13,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:13,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:09:13,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296139073] [2021-10-16 02:09:13,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:13,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:13,463 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:13,520 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-10-16 02:09:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 02:09:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:13,523 INFO L225 Difference]: With dead ends: 76 [2021-10-16 02:09:13,523 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 02:09:13,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 02:09:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-10-16 02:09:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-10-16 02:09:13,532 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 23 [2021-10-16 02:09:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:13,533 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-10-16 02:09:13,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-10-16 02:09:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:09:13,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:13,534 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:13,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:13,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:13,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2021-10-16 02:09:13,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:13,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949173580] [2021-10-16 02:09:13,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:09:13,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:13,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:13,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:13,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:09:14,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:09:14,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:09:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:09:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:14,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:14,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:14,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949173580] [2021-10-16 02:09:14,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949173580] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:14,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091393445] [2021-10-16 02:09:14,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:09:14,724 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:09:14,725 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:09:14,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:09:15,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:09:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:09:15,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:09:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:15,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:15,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1091393445] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:15,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273872854] [2021-10-16 02:09:15,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:09:15,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:09:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:09:15,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:09:15,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:09:15,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:09:15,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:09:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:09:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:16,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273872854] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:16,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:09:16,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 8, 6] total 16 [2021-10-16 02:09:16,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112213499] [2021-10-16 02:09:16,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:09:16,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:16,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:09:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:09:16,507 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:16,872 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-10-16 02:09:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:09:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:09:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:16,876 INFO L225 Difference]: With dead ends: 67 [2021-10-16 02:09:16,876 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 02:09:16,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 614.7ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:09:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 02:09:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-10-16 02:09:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-10-16 02:09:16,885 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 26 [2021-10-16 02:09:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:16,885 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-10-16 02:09:16,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-10-16 02:09:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:09:16,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:16,887 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:16,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:17,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:17,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:17,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:17,497 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2021-10-16 02:09:17,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:17,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29545435] [2021-10-16 02:09:17,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:09:17,498 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:17,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:17,499 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:17,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:09:17,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:09:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:09:17,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:09:17,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:18,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:18,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:18,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29545435] [2021-10-16 02:09:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29545435] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:18,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [295602397] [2021-10-16 02:09:18,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:09:18,286 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:18,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:09:18,287 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:09:18,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 02:09:18,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:09:18,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:09:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:09:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:18,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:18,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [295602397] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:18,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125020994] [2021-10-16 02:09:18,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:09:18,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:09:18,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:09:18,987 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:09:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-16 02:09:19,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:09:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:09:19,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:09:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:19,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:19,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125020994] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:19,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:09:19,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-10-16 02:09:19,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949522345] [2021-10-16 02:09:19,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:09:19,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:09:19,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:09:19,672 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:20,448 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2021-10-16 02:09:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 02:09:20,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-16 02:09:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:20,450 INFO L225 Difference]: With dead ends: 120 [2021-10-16 02:09:20,450 INFO L226 Difference]: Without dead ends: 79 [2021-10-16 02:09:20,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-10-16 02:09:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-16 02:09:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-10-16 02:09:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.125) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-10-16 02:09:20,463 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 29 [2021-10-16 02:09:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:20,464 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-10-16 02:09:20,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-10-16 02:09:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-16 02:09:20,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:20,466 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:20,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:20,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-16 02:09:20,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:21,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:21,081 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2031166962, now seen corresponding path program 1 times [2021-10-16 02:09:21,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:21,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15054643] [2021-10-16 02:09:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:21,082 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:21,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:21,083 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:21,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:09:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:26,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:09:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:35,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:51,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:51,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15054643] [2021-10-16 02:09:51,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15054643] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:51,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1985995398] [2021-10-16 02:09:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:51,218 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:51,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:09:51,221 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:09:51,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-16 02:09:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:09:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:57,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:08,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1985995398] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:08,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461408747] [2021-10-16 02:10:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:08,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:08,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:08,646 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:08,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-16 02:10:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-16 02:10:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:27,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:11:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:11:08,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461408747] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:11:08,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:11:08,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10, 9, 15, 14] total 51 [2021-10-16 02:11:08,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351332662] [2021-10-16 02:11:08,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-16 02:11:08,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:11:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-16 02:11:08,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=2019, Unknown=17, NotChecked=0, Total=2550 [2021-10-16 02:11:08,133 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 51 states, 51 states have (on average 2.5686274509803924) internal successors, (131), 51 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:11:43,367 WARN L207 SmtUtils]: Spent 10.20 s on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-10-16 02:12:55,648 WARN L207 SmtUtils]: Spent 24.93 s on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-10-16 02:13:17,459 WARN L207 SmtUtils]: Spent 7.35 s on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-10-16 02:13:39,686 WARN L207 SmtUtils]: Spent 10.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-10-16 02:14:00,271 WARN L207 SmtUtils]: Spent 16.69 s on a formula simplification that was a NOOP. DAG size: 51 [2021-10-16 02:14:19,617 WARN L207 SmtUtils]: Spent 16.53 s on a formula simplification that was a NOOP. DAG size: 50 [2021-10-16 02:15:03,187 WARN L207 SmtUtils]: Spent 26.30 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-10-16 02:15:39,229 WARN L207 SmtUtils]: Spent 26.52 s on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-10-16 02:16:13,694 WARN L207 SmtUtils]: Spent 25.63 s on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-10-16 02:16:50,926 WARN L207 SmtUtils]: Spent 26.55 s on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-10-16 02:17:28,313 WARN L207 SmtUtils]: Spent 25.57 s on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-10-16 02:18:01,450 WARN L207 SmtUtils]: Spent 27.95 s on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-10-16 02:18:37,120 WARN L207 SmtUtils]: Spent 25.29 s on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-10-16 02:19:05,873 WARN L207 SmtUtils]: Spent 26.24 s on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-10-16 02:19:51,909 WARN L207 SmtUtils]: Spent 26.23 s on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-10-16 02:20:34,236 WARN L207 SmtUtils]: Spent 22.66 s on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-10-16 02:21:10,605 WARN L207 SmtUtils]: Spent 27.74 s on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-10-16 02:21:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:11,660 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2021-10-16 02:21:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-16 02:21:11,664 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.5686274509803924) internal successors, (131), 51 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-16 02:21:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:11,665 INFO L225 Difference]: With dead ends: 170 [2021-10-16 02:21:11,665 INFO L226 Difference]: Without dead ends: 140 [2021-10-16 02:21:11,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 620050.9ms TimeCoverageRelationStatistics Valid=1549, Invalid=7532, Unknown=39, NotChecked=0, Total=9120 [2021-10-16 02:21:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-16 02:21:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2021-10-16 02:21:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.144578313253012) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-10-16 02:21:11,684 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 30 [2021-10-16 02:21:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:11,684 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-10-16 02:21:11,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.5686274509803924) internal successors, (131), 51 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-10-16 02:21:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-16 02:21:11,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:11,687 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:11,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:11,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:12,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:12,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:12,292 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:21:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:12,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2085648099, now seen corresponding path program 1 times [2021-10-16 02:21:12,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:12,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807988770] [2021-10-16 02:21:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:12,293 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:12,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:12,294 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:12,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:21:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:21:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-16 02:21:13,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-16 02:21:13,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:13,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807988770] [2021-10-16 02:21:13,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807988770] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:13,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1005521144] [2021-10-16 02:21:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:13,504 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:13,509 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:13,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-16 02:21:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:21:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-16 02:21:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-16 02:21:14,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1005521144] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:14,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324038015] [2021-10-16 02:21:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:14,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:21:14,865 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:21:14,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-16 02:21:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:15,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-16 02:21:15,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 32 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:21:15,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-10-16 02:21:16,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324038015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:21:16,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:21:16,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 13, 8] total 26 [2021-10-16 02:21:16,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972097861] [2021-10-16 02:21:16,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:21:16,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:21:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:21:16,367 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:16,709 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-10-16 02:21:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:21:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-16 02:21:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:16,710 INFO L225 Difference]: With dead ends: 85 [2021-10-16 02:21:16,710 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:21:16,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-10-16 02:21:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:21:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:21:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:21:16,712 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-10-16 02:21:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:16,712 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:21:16,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:21:16,713 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:21:16,715 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:21:16,719 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:21:16,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:16,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:17,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-16 02:21:17,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:21:17,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:21:17,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:17,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:17,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:17,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:21:32,058 WARN L207 SmtUtils]: Spent 14.44 s on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2021-10-16 02:21:48,378 WARN L207 SmtUtils]: Spent 16.32 s on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-10-16 02:21:48,381 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-10-16 02:21:48,381 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-10-16 02:21:48,381 INFO L853 garLoopResultBuilder]: At program point L19-2(line 42) the Hoare annotation is: (let ((.cse5 (exists ((v_ULTIMATE.start_main_~b~0_39 (_ BitVec 32))) (= (bvudiv (bvmul v_ULTIMATE.start_main_~b~0_39 (_ bv2 32)) (_ bv2 32)) ULTIMATE.start_main_~b~0))) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32))) (.cse14 (= ULTIMATE.start_main_~q~0 (_ bv0 32))) (.cse15 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0)) (.cse3 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (.cse4 (bvuge ULTIMATE.start_main_~B~0 (_ bv1 32))) (.cse6 (bvult ULTIMATE.start_main_~B~0 (_ bv2147483647 32))) (.cse13 (bvneg ULTIMATE.start_main_~b~0))) (let ((.cse1 (= ULTIMATE.start_main_~q~0 (_ bv1 32))) (.cse2 (bvmul ULTIMATE.start_main_~B~0 (_ bv2 32))) (.cse7 (= ULTIMATE.start_main_~r~0 (bvadd .cse13 ULTIMATE.start_main_~A~0))) (.cse9 (not (bvuge ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0))) (.cse10 (= ~counter~0 (_ bv5 32))) (.cse8 (or (and .cse0 .cse14 .cse15 .cse3 .cse4 .cse5 .cse6) (and (exists ((v_ULTIMATE.start_main_~b~0_39 (_ BitVec 32))) (= (bvmul (_ bv2 32) v_ULTIMATE.start_main_~b~0_39) ULTIMATE.start_main_~b~0)) .cse0 .cse14 .cse15 .cse3 .cse4 .cse6)))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~b~0 (bvudiv .cse2 (_ bv2 32))) .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse8 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0)) (and (bvuge ULTIMATE.start_main_~r~0 .cse2) .cse9 .cse8 (= ULTIMATE.start_main_~b~0 (bvmul (_ bv4 32) ULTIMATE.start_main_~B~0)) (= (_ bv4 32) ~counter~0)) (let ((.cse12 (bvadd (bvmul .cse13 (_ bv4294967295 32)) ULTIMATE.start_main_~r~0)) (.cse11 (bvmul ULTIMATE.start_main_~B~0 (_ bv4 32)))) (and .cse10 (= ULTIMATE.start_main_~b~0 (bvudiv .cse11 (_ bv2 32))) .cse0 .cse1 (bvuge .cse12 .cse2) .cse3 (not (bvuge .cse12 .cse11)) .cse4 .cse5 .cse6 .cse7)) (and .cse0 (= ULTIMATE.start_main_~b~0 (bvmul (_ bv2 32) ULTIMATE.start_main_~B~0)) (exists ((v_ULTIMATE.start_main_~b~0_34 (_ BitVec 32))) (and (= (bvmul (_ bv2 32) v_ULTIMATE.start_main_~b~0_34) ULTIMATE.start_main_~b~0) (bvuge ULTIMATE.start_main_~r~0 v_ULTIMATE.start_main_~b~0_34) (bvult v_ULTIMATE.start_main_~b~0_34 (_ bv2147483647 32)))) .cse14 .cse9 .cse15 .cse3 .cse6) (and .cse10 .cse8)))) [2021-10-16 02:21:48,381 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-10-16 02:21:48,382 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-16 02:21:48,382 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2021-10-16 02:21:48,382 INFO L860 garLoopResultBuilder]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-10-16 02:21:48,382 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 49) no Hoare annotation was computed. [2021-10-16 02:21:48,382 INFO L857 garLoopResultBuilder]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2021-10-16 02:21:48,382 INFO L857 garLoopResultBuilder]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L853 garLoopResultBuilder]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse0 (exists ((v_ULTIMATE.start_main_~b~0_93 (_ BitVec 32))) (= (bvmul (_ bv4 32) v_ULTIMATE.start_main_~b~0_93) ULTIMATE.start_main_~b~0))) (.cse3 (exists ((v_ULTIMATE.start_main_~b~0_93 (_ BitVec 32))) (= (bvmul (_ bv2 32) v_ULTIMATE.start_main_~b~0_93) ULTIMATE.start_main_~b~0))) (.cse1 (= ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32))) (.cse2 (= ULTIMATE.start_main_~q~0 (_ bv0 32))) (.cse4 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0)) (.cse5 (bvuge ULTIMATE.start_main_~B~0 (_ bv1 32))) (.cse6 (bvult ULTIMATE.start_main_~B~0 (_ bv2147483647 32)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= (_ bv4 32) ~counter~0) .cse6) (and .cse1 .cse2 (= ~counter~0 (_ bv0 32)) .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) (bvuge ULTIMATE.start_main_~b~0 (_ bv1 32)) .cse6) (and .cse0 (= (_ bv3 32) ~counter~0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and (= ~counter~0 (_ bv1 32)) .cse1 (= ULTIMATE.start_main_~b~0 (bvmul (_ bv2 32) ULTIMATE.start_main_~B~0)) .cse2 (= (bvadd (bvmul ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~r~0) ULTIMATE.start_main_~A~0) (exists ((v_ULTIMATE.start_main_~b~0_44 (_ BitVec 32))) (and (bvuge v_ULTIMATE.start_main_~b~0_44 (_ bv1 32)) (= ULTIMATE.start_main_~b~0 (bvmul (_ bv2 32) v_ULTIMATE.start_main_~b~0_44)) (bvuge ULTIMATE.start_main_~r~0 v_ULTIMATE.start_main_~b~0_44) (bvult v_ULTIMATE.start_main_~b~0_44 (_ bv2147483647 32)))) .cse6) (and .cse0 (= ~counter~0 (_ bv5 32)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and (= (_ bv2 32) ~counter~0) .cse1 (bvuge ULTIMATE.start_main_~r~0 (bvmul ULTIMATE.start_main_~B~0 (_ bv2 32))) .cse2 .cse4 (= ULTIMATE.start_main_~b~0 (bvmul (_ bv4 32) ULTIMATE.start_main_~B~0)) .cse5 .cse6))) [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point L16-2(line 16) no Hoare annotation was computed. [2021-10-16 02:21:48,383 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 48) no Hoare annotation was computed. [2021-10-16 02:21:48,384 INFO L857 garLoopResultBuilder]: For program point L45-2(lines 26 52) no Hoare annotation was computed. [2021-10-16 02:21:48,384 INFO L857 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2021-10-16 02:21:48,384 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:21:48,384 INFO L860 garLoopResultBuilder]: At program point L51(lines 26 52) the Hoare annotation is: true [2021-10-16 02:21:48,389 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:21:48,396 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:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:452) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:21:48,399 INFO L168 Benchmark]: Toolchain (without parser) took 802209.12 ms. Allocated memory was 54.5 MB in the beginning and 86.0 MB in the end (delta: 31.5 MB). Free memory was 33.0 MB in the beginning and 28.4 MB in the end (delta: 4.6 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:48,400 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 54.5 MB. Free memory is still 36.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:48,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.74 ms. Allocated memory is still 54.5 MB. Free memory was 32.8 MB in the beginning and 37.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:48,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.44 ms. Allocated memory is still 54.5 MB. Free memory was 37.8 MB in the beginning and 36.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:21:48,401 INFO L168 Benchmark]: Boogie Preprocessor took 31.51 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 35.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:48,402 INFO L168 Benchmark]: RCFGBuilder took 465.35 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 25.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:48,402 INFO L168 Benchmark]: TraceAbstraction took 801306.18 ms. Allocated memory was 54.5 MB in the beginning and 86.0 MB in the end (delta: 31.5 MB). Free memory was 24.7 MB in the beginning and 28.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:21:48,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 54.5 MB. Free memory is still 36.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.74 ms. Allocated memory is still 54.5 MB. Free memory was 32.8 MB in the beginning and 37.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.44 ms. Allocated memory is still 54.5 MB. Free memory was 37.8 MB in the beginning and 36.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.51 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 35.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 465.35 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 25.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 801306.18 ms. Allocated memory was 54.5 MB in the beginning and 86.0 MB in the end (delta: 31.5 MB). Free memory was 24.7 MB in the beginning and 28.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 801132.8ms, OverallIterations: 11, TraceHistogramMax: 12, EmptinessCheckTime: 41.6ms, AutomataDifference: 626942.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 31060.0ms, InitialAbstractionConstructionTime: 21.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 254 SDtfs, 1209 SDslu, 1515 SDs, 0 SdLazy, 1464 SolverSat, 552 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 78424.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1293 GetRequests, 1030 SyntacticMatches, 10 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4274 ImplicationChecksByTransitivity, 642113.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=10, InterpolantAutomatonStates: 165, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 170 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 18 NumberOfFragments, 510 HoareAnnotationTreeSize, 4 FomulaSimplifications, 1348 FormulaSimplificationTreeSizeReduction, 290.8ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 499 FormulaSimplificationTreeSizeReductionInter, 30762.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 288.8ms SsaConstructionTime, 10982.6ms SatisfiabilityAnalysisTime, 120980.2ms InterpolantComputationTime, 615 NumberOfCodeBlocks, 615 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1184 ConstructedInterpolants, 72 QuantifiedInterpolants, 8820 SizeOfPredicates, 120 NumberOfNonLiveVariables, 1551 ConjunctsInSsa, 281 ConjunctsInUnsatCore, 46 InterpolantComputations, 10 PerfectInterpolantSequences, 994/1618 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 - 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. [2021-10-16 02:21:48,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4faad7-bd40-45d2-bf47-06045a17e947/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...