./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7 --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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:37:03,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:37:03,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:37:03,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:37:03,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:37:03,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:37:03,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:37:03,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:37:03,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:37:03,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:37:03,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:37:03,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:37:03,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:37:03,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:37:03,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:37:03,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:37:03,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:37:03,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:37:03,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:37:03,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:37:03,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:37:03,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:37:03,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:37:03,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:37:03,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:37:03,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:37:03,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:37:03,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:37:03,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:37:03,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:37:03,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:37:03,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:37:03,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:37:03,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:37:03,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:37:03,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:37:03,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:37:03,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:37:03,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:37:03,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:37:03,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:37:03,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:37:03,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:37:03,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:37:03,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:37:03,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:37:03,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:37:03,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:37:03,869 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:37:03,869 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:37:03,869 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:37:03,869 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:37:03,870 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:37:03,870 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:37:03,870 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:37:03,870 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:37:03,870 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:37:03,871 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:37:03,871 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:37:03,871 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:37:03,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:37:03,872 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:37:03,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:37:03,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:37:03,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:37:03,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:37:03,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:37:03,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:37:03,874 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:37:03,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:37:03,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:37:03,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:37:03,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:37:03,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:37:03,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:37:03,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:37:03,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:37:03,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:37:03,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:37:03,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:37:03,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:37:03,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:37:03,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:37:03,878 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2021-11-25 20:37:04,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:37:04,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:37:04,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:37:04,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:37:04,164 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:37:04,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-11-25 20:37:04,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/data/63ce26ba4/1b8e104b515f4964a92973187c3a910d/FLAGc4ddbbd20 [2021-11-25 20:37:04,810 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:37:04,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-11-25 20:37:04,823 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/data/63ce26ba4/1b8e104b515f4964a92973187c3a910d/FLAGc4ddbbd20 [2021-11-25 20:37:05,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/data/63ce26ba4/1b8e104b515f4964a92973187c3a910d [2021-11-25 20:37:05,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:37:05,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:37:05,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:37:05,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:37:05,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:37:05,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@694f9f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05, skipping insertion in model container [2021-11-25 20:37:05,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:37:05,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:37:05,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-11-25 20:37:05,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:37:05,557 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:37:05,587 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-11-25 20:37:05,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:37:05,708 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:37:05,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05 WrapperNode [2021-11-25 20:37:05,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:37:05,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:37:05,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:37:05,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:37:05,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,799 INFO L137 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 422 [2021-11-25 20:37:05,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:37:05,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:37:05,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:37:05,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:37:05,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:37:05,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:37:05,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:37:05,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:37:05,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:37:05,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:05,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:37:05,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:37:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:37:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:37:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2021-11-25 20:37:05,965 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2021-11-25 20:37:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:37:05,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:37:06,068 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:37:06,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:37:06,652 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:37:07,101 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:37:07,101 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 20:37:07,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:37:07 BoogieIcfgContainer [2021-11-25 20:37:07,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:37:07,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:37:07,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:37:07,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:37:07,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:37:05" (1/3) ... [2021-11-25 20:37:07,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d4a034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:37:07, skipping insertion in model container [2021-11-25 20:37:07,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05" (2/3) ... [2021-11-25 20:37:07,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d4a034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:37:07, skipping insertion in model container [2021-11-25 20:37:07,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:37:07" (3/3) ... [2021-11-25 20:37:07,119 INFO L111 eAbstractionObserver]: Analyzing ICFG pipeline.cil-1.c [2021-11-25 20:37:07,130 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:37:07,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:37:07,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:37:07,221 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:37:07,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:37:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:37:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:37:07,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:07,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:07,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1030469667, now seen corresponding path program 1 times [2021-11-25 20:37:07,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:07,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585205150] [2021-11-25 20:37:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:07,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:37:07,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:07,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585205150] [2021-11-25 20:37:07,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585205150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:37:07,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215722334] [2021-11-25 20:37:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:07,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:07,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:07,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:37:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 20:37:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:37:08,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:08,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215722334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:08,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:37:08,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-25 20:37:08,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422240560] [2021-11-25 20:37:08,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:08,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:37:08,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:08,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:37:08,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:37:08,102 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:37:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:08,181 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-25 20:37:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:37:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-25 20:37:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:08,196 INFO L225 Difference]: With dead ends: 57 [2021-11-25 20:37:08,197 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 20:37:08,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:37:08,211 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:08,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:37:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 20:37:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 20:37:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:37:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2021-11-25 20:37:08,287 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 16 [2021-11-25 20:37:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:08,287 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2021-11-25 20:37:08,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:37:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2021-11-25 20:37:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 20:37:08,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:08,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:08,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:08,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 20:37:08,516 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:08,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1095063889, now seen corresponding path program 1 times [2021-11-25 20:37:08,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:08,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677537184] [2021-11-25 20:37:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:08,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:37:09,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677537184] [2021-11-25 20:37:09,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677537184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:37:09,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758664924] [2021-11-25 20:37:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:09,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:09,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:09,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:09,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:37:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:37:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:37:09,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:09,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758664924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:09,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:37:09,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2021-11-25 20:37:09,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097965658] [2021-11-25 20:37:09,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:09,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:37:09,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:37:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:37:09,592 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:37:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:09,697 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-11-25 20:37:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:37:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-25 20:37:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:09,702 INFO L225 Difference]: With dead ends: 67 [2021-11-25 20:37:09,703 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 20:37:09,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:37:09,708 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:09,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 20:37:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-11-25 20:37:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:37:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2021-11-25 20:37:09,737 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 40 [2021-11-25 20:37:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:09,737 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2021-11-25 20:37:09,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:37:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2021-11-25 20:37:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:37:09,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:09,748 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:09,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:09,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:09,976 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1023532891, now seen corresponding path program 1 times [2021-11-25 20:37:09,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:09,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916203482] [2021-11-25 20:37:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:09,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 2 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:37:10,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916203482] [2021-11-25 20:37:10,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916203482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:37:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833957461] [2021-11-25 20:37:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:10,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:10,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:10,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:10,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68527773-01d7-43e8-b22c-26e42acb1e1e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:37:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:10,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:37:10,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-25 20:37:11,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:37:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-25 20:37:11,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833957461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:37:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8006896] [2021-11-25 20:37:11,247 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 20:37:11,247 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:37:11,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:37:11,263 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:37:11,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:37:12,254 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-25 20:37:12,972 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time... [2021-11-25 20:40:40,591 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32768 conjuctions. [2021-11-25 20:40:41,930 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-25 20:40:42,436 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time... [2021-11-25 20:44:20,723 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32768 conjuctions.