./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 894596aca9a1908fd868912b199c54fd3b1d0950 ....................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 894596aca9a1908fd868912b199c54fd3b1d0950 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:32:16,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:32:16,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:32:16,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:32:16,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:32:16,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:32:16,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:32:16,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:32:16,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:32:16,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:32:16,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:32:16,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:32:16,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:32:16,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:32:16,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:32:16,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:32:16,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:32:16,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:32:16,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:32:16,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:32:16,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:32:16,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:32:16,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:32:16,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:32:16,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:32:16,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:32:16,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:32:16,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:32:16,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:32:16,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:32:16,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:32:16,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:32:16,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:32:16,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:32:16,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:32:16,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:32:16,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:32:16,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:32:16,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:32:16,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:32:16,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:32:16,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:32:16,907 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:32:16,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:32:16,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:32:16,908 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:32:16,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:32:16,908 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:32:16,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:32:16,908 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:32:16,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:32:16,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:32:16,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:32:16,909 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:32:16,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:32:16,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:32:16,909 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:32:16,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:32:16,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:32:16,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:32:16,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:32:16,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:32:16,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:32:16,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:32:16,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:32:16,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:32:16,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:32:16,911 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:32:16,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:32:16,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:32:16,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:32:16,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:32:16,912 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 894596aca9a1908fd868912b199c54fd3b1d0950 [2020-12-09 17:32:17,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:32:17,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:32:17,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:32:17,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:32:17,115 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:32:17,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2020-12-09 17:32:17,164 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/344fd27ff/53cb9253d15c4647afb40e2a6e2f0948/FLAG61acea697 [2020-12-09 17:32:17,527 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:32:17,527 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2020-12-09 17:32:17,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/344fd27ff/53cb9253d15c4647afb40e2a6e2f0948/FLAG61acea697 [2020-12-09 17:32:17,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/344fd27ff/53cb9253d15c4647afb40e2a6e2f0948 [2020-12-09 17:32:17,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:32:17,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:32:17,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:32:17,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:32:17,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:32:17,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89fca20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17, skipping insertion in model container [2020-12-09 17:32:17,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:32:17,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:32:17,663 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2020-12-09 17:32:17,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:32:17,680 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:32:17,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2020-12-09 17:32:17,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:32:17,708 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:32:17,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17 WrapperNode [2020-12-09 17:32:17,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:32:17,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:32:17,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:32:17,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:32:17,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:32:17,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:32:17,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:32:17,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:32:17,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... [2020-12-09 17:32:17,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:32:17,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:32:17,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:32:17,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:32:17,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:32:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:32:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:32:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:32:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:32:17,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:32:17,976 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 17:32:17,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:32:17 BoogieIcfgContainer [2020-12-09 17:32:17,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:32:17,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:32:17,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:32:17,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:32:17,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:32:17" (1/3) ... [2020-12-09 17:32:17,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bd6cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:32:17, skipping insertion in model container [2020-12-09 17:32:17,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:32:17" (2/3) ... [2020-12-09 17:32:17,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bd6cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:32:17, skipping insertion in model container [2020-12-09 17:32:17,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:32:17" (3/3) ... [2020-12-09 17:32:17,984 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2020-12-09 17:32:17,995 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:32:17,997 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 17:32:18,006 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 17:32:18,024 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:32:18,024 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:32:18,024 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:32:18,024 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:32:18,024 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:32:18,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:32:18,025 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:32:18,025 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:32:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 17:32:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:32:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:32:18,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:32:18,038 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:32:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:32:18,043 INFO L82 PathProgramCache]: Analyzing trace with hash 81490399, now seen corresponding path program 1 times [2020-12-09 17:32:18,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:32:18,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333966166] [2020-12-09 17:32:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:32:18,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 17:32:18,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084888379] [2020-12-09 17:32:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:32:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:32:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 17:32:18,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:32:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:32:18,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:32:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:32:20,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333966166] [2020-12-09 17:32:20,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:32:20,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084888379] [2020-12-09 17:32:20,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:32:20,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 17:32:20,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282101806] [2020-12-09 17:32:20,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:32:20,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:32:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:32:20,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2020-12-09 17:32:20,300 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-12-09 17:32:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:32:32,492 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-12-09 17:32:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 17:32:32,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 17:32:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:32:32,555 INFO L225 Difference]: With dead ends: 51 [2020-12-09 17:32:32,555 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 17:32:32,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=23, Invalid=30, Unknown=3, NotChecked=0, Total=56 [2020-12-09 17:32:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 17:32:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-12-09 17:32:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 17:32:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 17:32:32,580 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 5 [2020-12-09 17:32:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:32:32,580 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 17:32:32,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:32:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 17:32:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:32:32,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:32:32,581 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:32:32,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 17:32:32,783 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:32:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:32:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash 908273882, now seen corresponding path program 1 times [2020-12-09 17:32:32,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:32:32,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321962914] [2020-12-09 17:32:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:32:32,825 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 17:32:32,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201200532] [2020-12-09 17:32:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:32:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:32:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 17:32:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:32:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:32:32,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:32:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:32:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321962914] [2020-12-09 17:32:32,938 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:32:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201200532] [2020-12-09 17:32:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470846121] [2020-12-09 17:32:32,958 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 17:32:32,958 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:32:32,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:32:32,965 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:32:32,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:32:33,481 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:32:46,104 WARN L197 SmtUtils]: Spent 12.61 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-12-09 17:32:46,679 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 83 [2020-12-09 17:32:47,138 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2020-12-09 17:34:40,680 WARN L197 SmtUtils]: Spent 1.89 m on a formula simplification. DAG size of input: 124 DAG size of output: 95 [2020-12-09 17:34:43,160 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-09 17:34:43,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:34:43,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 17:34:43,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-09 17:34:43,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267378739] [2020-12-09 17:34:43,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 17:34:43,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:34:43,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 17:34:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2020-12-09 17:34:43,163 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2020-12-09 17:34:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:34:43,251 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-12-09 17:34:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 17:34:43,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 17:34:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:34:43,253 INFO L225 Difference]: With dead ends: 55 [2020-12-09 17:34:43,253 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 17:34:43,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 129.7s TimeCoverageRelationStatistics Valid=57, Invalid=248, Unknown=1, NotChecked=0, Total=306 [2020-12-09 17:34:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 17:34:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2020-12-09 17:34:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 17:34:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-09 17:34:43,258 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2020-12-09 17:34:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:34:43,258 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-09 17:34:43,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 17:34:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-09 17:34:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:34:43,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:34:43,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:34:43,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:34:43,460 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:34:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:34:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1019667251, now seen corresponding path program 1 times [2020-12-09 17:34:43,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:34:43,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746319984] [2020-12-09 17:34:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:34:43,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 17:34:43,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188794707] [2020-12-09 17:34:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:34:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:34:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 17:34:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:34:43,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746319984] [2020-12-09 17:34:43,572 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:34:43,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188794707] [2020-12-09 17:34:43,572 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 17:34:43,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630838927] [2020-12-09 17:34:43,575 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 17:34:43,575 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:34:43,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:34:43,576 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:34:43,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:34:43,798 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:34:44,098 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-09 17:34:49,764 WARN L197 SmtUtils]: Spent 5.52 s on a formula simplification that was a NOOP. DAG size: 55 [2020-12-09 17:34:49,933 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-09 17:37:19,023 WARN L197 SmtUtils]: Spent 2.48 m on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-09 17:37:19,241 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-09 17:37:19,242 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:37:19,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:19,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 17:37:19,243 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 17:37:19,243 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:37:19,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-09 17:37:19,459 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 17:37:19,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:37:19 BoogieIcfgContainer [2020-12-09 17:37:19,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:37:19,460 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:37:19,460 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:37:19,461 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:37:19,461 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:32:17" (3/4) ... [2020-12-09 17:37:19,463 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 17:37:19,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:37:19,464 INFO L168 Benchmark]: Toolchain (without parser) took 301920.07 ms. Allocated memory was 90.2 MB in the beginning and 125.8 MB in the end (delta: 35.7 MB). Free memory was 67.4 MB in the beginning and 49.0 MB in the end (delta: 18.4 MB). Peak memory consumption was 54.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:19,464 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 90.2 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:37:19,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.55 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 69.6 MB in the end (delta: -2.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:19,465 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.91 ms. Allocated memory is still 90.2 MB. Free memory was 69.6 MB in the beginning and 68.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:19,466 INFO L168 Benchmark]: Boogie Preprocessor took 17.61 ms. Allocated memory is still 90.2 MB. Free memory was 68.0 MB in the beginning and 66.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:37:19,466 INFO L168 Benchmark]: RCFGBuilder took 218.45 ms. Allocated memory is still 90.2 MB. Free memory was 66.9 MB in the beginning and 52.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:19,467 INFO L168 Benchmark]: TraceAbstraction took 301480.99 ms. Allocated memory was 90.2 MB in the beginning and 125.8 MB in the end (delta: 35.7 MB). Free memory was 52.3 MB in the beginning and 49.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 40.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:37:19,467 INFO L168 Benchmark]: Witness Printer took 2.82 ms. Allocated memory is still 125.8 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:37:19,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 90.2 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 164.55 ms. Allocated memory is still 90.2 MB. Free memory was 67.2 MB in the beginning and 69.6 MB in the end (delta: -2.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.91 ms. Allocated memory is still 90.2 MB. Free memory was 69.6 MB in the beginning and 68.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.61 ms. Allocated memory is still 90.2 MB. Free memory was 68.0 MB in the beginning and 66.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 218.45 ms. Allocated memory is still 90.2 MB. Free memory was 66.9 MB in the beginning and 52.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 301480.99 ms. Allocated memory was 90.2 MB in the beginning and 125.8 MB in the end (delta: 35.7 MB). Free memory was 52.3 MB in the beginning and 49.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 40.7 MB. Max. memory is 16.1 GB. * Witness Printer took 2.82 ms. Allocated memory is still 125.8 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] EXPR counter++ [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x [L27] EXPR counter++ [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) [L30] COND TRUE !(c < k) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 301.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 12.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 47 SDslu, 99 SDs, 0 SdLazy, 47 SolverSat, 17 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 135.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 622 SizeOfPredicates, 4 NumberOfNonLiveVariables, 123 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:37:20,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:37:20,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:37:20,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:37:20,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:37:20,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:37:20,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:37:20,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:37:20,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:37:20,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:37:20,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:37:21,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:37:21,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:37:21,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:37:21,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:37:21,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:37:21,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:37:21,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:37:21,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:37:21,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:37:21,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:37:21,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:37:21,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:37:21,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:37:21,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:37:21,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:37:21,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:37:21,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:37:21,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:37:21,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:37:21,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:37:21,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:37:21,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:37:21,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:37:21,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:37:21,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:37:21,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:37:21,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:37:21,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:37:21,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:37:21,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:37:21,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 17:37:21,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:37:21,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:37:21,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:37:21,042 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:37:21,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:37:21,043 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:37:21,043 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:37:21,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:37:21,043 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:37:21,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 17:37:21,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:37:21,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:37:21,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:37:21,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:37:21,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:37:21,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 17:37:21,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:37:21,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:37:21,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:37:21,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:37:21,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:37:21,051 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 17:37:21,051 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 17:37:21,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:37:21,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:37:21,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:37:21,052 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 894596aca9a1908fd868912b199c54fd3b1d0950 [2020-12-09 17:37:21,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:37:21,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:37:21,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:37:21,307 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:37:21,308 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:37:21,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2020-12-09 17:37:21,348 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/64369618a/81c27c6ff1ed477591c5cd64ae526c91/FLAG3abe97073 [2020-12-09 17:37:21,802 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:37:21,802 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2020-12-09 17:37:21,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/64369618a/81c27c6ff1ed477591c5cd64ae526c91/FLAG3abe97073 [2020-12-09 17:37:21,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/data/64369618a/81c27c6ff1ed477591c5cd64ae526c91 [2020-12-09 17:37:21,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:37:21,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:37:21,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:37:21,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:37:21,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:37:21,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:21,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676020a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21, skipping insertion in model container [2020-12-09 17:37:21,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:21,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:37:21,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:37:21,939 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2020-12-09 17:37:21,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:37:21,965 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:37:21,974 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2020-12-09 17:37:21,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:37:21,995 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:37:21,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21 WrapperNode [2020-12-09 17:37:21,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:37:21,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:37:21,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:37:21,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:37:22,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:37:22,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:37:22,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:37:22,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:37:22,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... [2020-12-09 17:37:22,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:37:22,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:37:22,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:37:22,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:37:22,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 17:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:37:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:37:22,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:37:22,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:37:22,886 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 17:37:22,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:37:22 BoogieIcfgContainer [2020-12-09 17:37:22,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:37:22,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:37:22,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:37:22,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:37:22,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:37:21" (1/3) ... [2020-12-09 17:37:22,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c3aff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:37:22, skipping insertion in model container [2020-12-09 17:37:22,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:37:21" (2/3) ... [2020-12-09 17:37:22,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c3aff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:37:22, skipping insertion in model container [2020-12-09 17:37:22,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:37:22" (3/3) ... [2020-12-09 17:37:22,893 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2020-12-09 17:37:22,902 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:37:22,905 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 17:37:22,912 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 17:37:22,932 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:37:22,932 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:37:22,932 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:37:22,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:37:22,932 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:37:22,932 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:37:22,932 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:37:22,932 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:37:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-09 17:37:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:37:22,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:22,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:37:22,945 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:37:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-09 17:37:22,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:22,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746444112] [2020-12-09 17:37:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 17:37:23,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:23,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:37:23,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746444112] [2020-12-09 17:37:23,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:37:23,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:37:23,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560286789] [2020-12-09 17:37:23,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:37:23,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:23,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:37:23,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:37:23,217 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-12-09 17:37:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:24,559 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-09 17:37:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:37:24,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 17:37:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:24,566 INFO L225 Difference]: With dead ends: 54 [2020-12-09 17:37:24,566 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 17:37:24,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:37:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 17:37:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-09 17:37:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:37:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 17:37:24,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2020-12-09 17:37:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:24,590 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 17:37:24,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:37:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 17:37:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:37:24,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:24,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:24,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 17:37:24,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:37:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-09 17:37:24,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:24,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932217434] [2020-12-09 17:37:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 17:37:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:25,595 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 17:37:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:25,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:27,796 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 17:37:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:37:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932217434] [2020-12-09 17:37:29,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [381908350] [2020-12-09 17:37:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:37:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:37:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:30,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:37:32,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174569613] [2020-12-09 17:37:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:37:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 17:37:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:33,402 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 11 [2020-12-09 17:37:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:33,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:38,358 WARN L197 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 17:37:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:38,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 17:37:38,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 6, 5] total 9 [2020-12-09 17:37:38,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510120512] [2020-12-09 17:37:38,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 17:37:38,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 17:37:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:37:38,372 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-12-09 17:37:39,314 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 17:37:39,855 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 17:37:42,339 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 17:37:45,536 WARN L197 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-09 17:37:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:46,985 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-09 17:37:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 17:37:46,986 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-09 17:37:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:46,987 INFO L225 Difference]: With dead ends: 30 [2020-12-09 17:37:46,987 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 17:37:46,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:37:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 17:37:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2020-12-09 17:37:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 17:37:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 17:37:46,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-09 17:37:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:46,991 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 17:37:46,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 17:37:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 17:37:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 17:37:46,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:46,992 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:47,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3,4 cvc4 --incremental --print-success --lang smt,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:37:47,595 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:37:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2020-12-09 17:37:47,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:47,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520343151] [2020-12-09 17:37:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:47,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 17:37:47,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:47,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520343151] [2020-12-09 17:37:47,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [229239740] [2020-12-09 17:37:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:37:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 17:37:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:48,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:48,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488563614] [2020-12-09 17:37:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:37:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 17:37:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:49,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:49,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 17:37:49,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2020-12-09 17:37:49,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113440719] [2020-12-09 17:37:49,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 17:37:49,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:37:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 17:37:49,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-09 17:37:49,178 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-09 17:37:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:37:51,328 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-09 17:37:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 17:37:51,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 17:37:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:37:51,329 INFO L225 Difference]: With dead ends: 36 [2020-12-09 17:37:51,329 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 17:37:51,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-09 17:37:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 17:37:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-09 17:37:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 17:37:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-09 17:37:51,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2020-12-09 17:37:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:37:51,336 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-09 17:37:51,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 17:37:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-09 17:37:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 17:37:51,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:37:51,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:37:51,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:37:51,939 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:37:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:37:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2020-12-09 17:37:51,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:37:51,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643989477] [2020-12-09 17:37:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 17:37:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 17:37:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:52,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:37:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:52,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:54,191 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-09 17:37:55,513 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-09 17:37:56,232 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 17:37:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:56,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643989477] [2020-12-09 17:37:56,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [132898048] [2020-12-09 17:37:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:37:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:56,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 17:37:56,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:37:56,742 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:37:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:56,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:37:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:37:56,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318159923] [2020-12-09 17:37:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:37:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:37:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 17:37:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:38:00,406 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2020-12-09 17:38:01,337 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 17:38:02,654 WARN L197 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2020-12-09 17:38:02,686 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:38:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:38:02,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:38:04,382 WARN L197 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 17:38:04,390 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:38:04,391 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:38:10,729 WARN L197 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 17:38:16,138 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 17:38:22,046 WARN L197 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-09 17:38:22,055 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:38:22,055 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:38:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:38:25,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 17:38:25,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 9, 9] total 18 [2020-12-09 17:38:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122969881] [2020-12-09 17:38:25,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 17:38:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:38:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 17:38:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-12-09 17:38:25,638 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 18 states. [2020-12-09 17:38:26,832 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 17:38:27,793 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-12-09 17:38:34,352 WARN L197 SmtUtils]: Spent 3.80 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 17:38:44,724 WARN L197 SmtUtils]: Spent 5.51 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 17:38:48,278 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 17:38:51,465 WARN L197 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 17:39:04,701 WARN L197 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 17:39:09,107 WARN L197 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 17:39:14,453 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 17:39:21,173 WARN L197 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 17:39:30,515 WARN L197 SmtUtils]: Spent 4.38 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 17:39:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:39:31,025 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-09 17:39:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 17:39:31,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-12-09 17:39:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:39:31,038 INFO L225 Difference]: With dead ends: 34 [2020-12-09 17:39:31,038 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 17:39:31,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 72.7s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2020-12-09 17:39:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 17:39:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 17:39:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 17:39:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-09 17:39:31,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2020-12-09 17:39:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:39:31,044 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-09 17:39:31,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 17:39:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-09 17:39:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 17:39:31,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:39:31,045 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 17:39:31,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:39:31,649 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:39:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:39:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 2 times [2020-12-09 17:39:31,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:39:31,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703837480] [2020-12-09 17:39:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 17:39:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:39:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 17:39:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:39:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:39:32,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:39:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:39:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703837480] [2020-12-09 17:39:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946640125] [2020-12-09 17:39:32,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:39:33,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 17:39:33,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:39:33,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 17:39:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:39:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:39:34,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:39:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:39:34,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161987484] [2020-12-09 17:39:34,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:39:36,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 17:39:36,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:39:36,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 17:39:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:39:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:39:36,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:39:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:39:37,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 17:39:37,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 19 [2020-12-09 17:39:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566451517] [2020-12-09 17:39:37,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 17:39:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:39:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 17:39:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-09 17:39:37,349 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-09 17:39:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:39:42,336 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-12-09 17:39:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-09 17:39:42,337 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-09 17:39:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:39:42,338 INFO L225 Difference]: With dead ends: 72 [2020-12-09 17:39:42,338 INFO L226 Difference]: Without dead ends: 68 [2020-12-09 17:39:42,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-12-09 17:39:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-09 17:39:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-12-09 17:39:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 17:39:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-12-09 17:39:42,351 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 23 [2020-12-09 17:39:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:39:42,352 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-12-09 17:39:42,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 17:39:42,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-12-09 17:39:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 17:39:42,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:39:42,353 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 17:39:42,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt,12 mathsat -unsat_core_generation=3 [2020-12-09 17:39:42,955 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:39:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:39:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1128495004, now seen corresponding path program 2 times [2020-12-09 17:39:42,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:39:42,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617443737] [2020-12-09 17:39:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 17:39:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:39:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 17:39:43,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:39:44,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:39:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:39:44,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:39:46,200 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-09 17:39:47,798 WARN L197 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-09 17:39:50,916 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 21 [2020-12-09 17:39:54,281 WARN L197 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-09 17:39:59,114 WARN L197 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-09 17:40:05,764 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 17:40:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:40:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617443737] [2020-12-09 17:40:05,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [721697196] [2020-12-09 17:40:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:40:07,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 17:40:07,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:40:07,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 17:40:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:40:07,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:40:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:40:07,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:40:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:40:07,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909540255] [2020-12-09 17:40:07,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:40:11,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 17:40:11,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:40:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 17:40:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:40:12,455 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 17:40:13,109 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-09 17:40:15,622 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-12-09 17:40:16,810 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-09 17:40:19,886 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-12-09 17:40:21,684 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-09 17:40:24,302 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2020-12-09 17:40:24,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 17:40:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:40:24,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:40:27,175 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 17:40:27,180 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:40:27,181 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:40:37,910 WARN L197 SmtUtils]: Spent 4.24 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 17:40:48,310 WARN L197 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-09 17:41:00,406 WARN L197 SmtUtils]: Spent 3.72 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 17:41:00,412 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:41:00,413 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:41:18,809 WARN L197 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-09 17:41:30,564 WARN L197 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-09 17:41:30,571 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 17:41:30,572 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 17:41:53,358 WARN L197 SmtUtils]: Spent 3.32 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 17:42:13,172 WARN L197 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-09 17:42:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:42:13,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 17:42:13,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 13, 13] total 34 [2020-12-09 17:42:13,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540900177] [2020-12-09 17:42:13,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-09 17:42:13,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:42:13,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-09 17:42:13,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=833, Unknown=9, NotChecked=0, Total=1122 [2020-12-09 17:42:13,215 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 34 states. [2020-12-09 17:42:17,529 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 17:42:19,942 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-09 17:42:24,744 WARN L197 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-09 17:42:28,640 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-09 17:42:29,758 WARN L197 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-09 17:43:07,475 WARN L197 SmtUtils]: Spent 31.32 s on a formula simplification that was a NOOP. DAG size: 68 [2020-12-09 17:43:31,230 WARN L197 SmtUtils]: Spent 19.25 s on a formula simplification that was a NOOP. DAG size: 64 [2020-12-09 17:43:44,633 WARN L197 SmtUtils]: Spent 10.22 s on a formula simplification that was a NOOP. DAG size: 67 [2020-12-09 17:44:17,918 WARN L197 SmtUtils]: Spent 27.76 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-09 17:44:34,628 WARN L197 SmtUtils]: Spent 3.33 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 17:45:11,489 WARN L197 SmtUtils]: Spent 30.09 s on a formula simplification that was a NOOP. DAG size: 67 [2020-12-09 17:45:19,300 WARN L197 SmtUtils]: Spent 4.37 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-09 17:45:26,462 WARN L197 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-09 17:45:38,679 WARN L197 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 17:45:48,237 WARN L197 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 17:45:55,788 WARN L197 SmtUtils]: Spent 3.58 s on a formula simplification that was a NOOP. DAG size: 39 [2020-12-09 17:46:06,677 WARN L197 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 17:46:12,932 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 17:46:21,552 WARN L197 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 17:46:44,039 WARN L197 SmtUtils]: Spent 5.99 s on a formula simplification that was a NOOP. DAG size: 80 [2020-12-09 17:46:50,672 WARN L197 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 49 [2020-12-09 17:46:59,176 WARN L197 SmtUtils]: Spent 3.42 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-09 17:46:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:46:59,946 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-09 17:46:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-09 17:46:59,992 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 25 [2020-12-09 17:46:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:46:59,993 INFO L225 Difference]: With dead ends: 62 [2020-12-09 17:46:59,993 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 17:46:59,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 365.7s TimeCoverageRelationStatistics Valid=868, Invalid=2315, Unknown=9, NotChecked=0, Total=3192 [2020-12-09 17:46:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 17:47:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-09 17:47:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 17:47:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-09 17:47:00,004 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 25 [2020-12-09 17:47:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:47:00,005 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-09 17:47:00,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-09 17:47:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-09 17:47:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-09 17:47:00,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:47:00,006 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 17:47:00,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt,15 mathsat -unsat_core_generation=3,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:47:00,610 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:47:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:47:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 3 times [2020-12-09 17:47:00,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:47:00,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102119947] [2020-12-09 17:47:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 17:47:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:47:03,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:47:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:47:05,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:47:05,911 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 17:47:05,911 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:47:06,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-12-09 17:47:06,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:47:06 BoogieIcfgContainer [2020-12-09 17:47:06,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:47:06,182 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:47:06,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:47:06,182 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:47:06,182 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:37:22" (3/4) ... [2020-12-09 17:47:06,184 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 17:47:06,226 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1b372e7d-200a-428d-97a4-73790e30df42/bin/utaipan/witness.graphml [2020-12-09 17:47:06,226 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:47:06,227 INFO L168 Benchmark]: Toolchain (without parser) took 584405.70 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 32.4 MB in the beginning and 30.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. [2020-12-09 17:47:06,227 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 37.5 MB in the beginning and 37.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:47:06,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.73 ms. Allocated memory is still 54.5 MB. Free memory was 32.2 MB in the beginning and 35.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-12-09 17:47:06,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.80 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 35.5 MB in the beginning and 53.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:47:06,228 INFO L168 Benchmark]: Boogie Preprocessor took 29.07 ms. Allocated memory is still 69.2 MB. Free memory was 53.6 MB in the beginning and 52.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:47:06,228 INFO L168 Benchmark]: RCFGBuilder took 829.49 ms. Allocated memory is still 69.2 MB. Free memory was 52.2 MB in the beginning and 38.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:47:06,228 INFO L168 Benchmark]: TraceAbstraction took 583293.39 ms. Allocated memory is still 69.2 MB. Free memory was 38.6 MB in the beginning and 34.5 MB in the end (delta: 4.1 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:47:06,229 INFO L168 Benchmark]: Witness Printer took 44.02 ms. Allocated memory is still 69.2 MB. Free memory was 34.5 MB in the beginning and 30.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:47:06,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 37.5 MB in the beginning and 37.5 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 173.73 ms. Allocated memory is still 54.5 MB. Free memory was 32.2 MB in the beginning and 35.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.80 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 35.5 MB in the beginning and 53.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.07 ms. Allocated memory is still 69.2 MB. Free memory was 53.6 MB in the beginning and 52.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 829.49 ms. Allocated memory is still 69.2 MB. Free memory was 52.2 MB in the beginning and 38.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 583293.39 ms. Allocated memory is still 69.2 MB. Free memory was 38.6 MB in the beginning and 34.5 MB in the end (delta: 4.1 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Witness Printer took 44.02 ms. Allocated memory is still 69.2 MB. Free memory was 34.5 MB in the beginning and 30.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND FALSE !(counter++<10) [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 583.1s, OverallIterations: 7, TraceHistogramMax: 11, AutomataDifference: 369.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 382 SDslu, 351 SDs, 0 SdLazy, 447 SolverSat, 230 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 94.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 530 GetRequests, 375 SyntacticMatches, 19 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 458.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 43 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 18.2s SatisfiabilityAnalysisTime, 188.8s InterpolantComputationTime, 299 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 467 ConstructedInterpolants, 24 QuantifiedInterpolants, 200503 SizeOfPredicates, 71 NumberOfNonLiveVariables, 882 ConjunctsInSsa, 178 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 6/486 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...