./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.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_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/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 1d887be7dd2c3278ee87053cbed7506ff3c2170c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 16:20:25,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:20:25,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:20:25,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:20:25,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:20:25,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:20:25,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:20:25,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:20:25,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:20:25,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:20:25,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:20:25,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:20:25,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:20:25,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:20:25,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:20:25,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:20:25,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:20:25,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:20:25,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:20:25,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:20:25,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:20:25,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:20:25,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:20:25,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:20:25,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:20:25,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:20:25,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:20:25,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:20:25,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:20:25,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:20:25,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:20:25,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:20:25,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:20:25,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:20:25,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:20:25,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:20:25,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:20:25,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:20:25,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:20:25,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:20:25,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:20:25,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 16:20:25,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:20:25,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:20:25,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:20:25,116 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:20:25,116 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:20:25,116 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:20:25,116 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:20:25,116 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:20:25,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:20:25,116 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:20:25,117 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:20:25,117 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:20:25,117 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:20:25,117 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:20:25,117 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:20:25,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:20:25,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:20:25,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:20:25,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:20:25,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:20:25,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:20:25,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:20:25,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:20:25,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:20:25,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:20:25,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:20:25,121 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:20:25,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:20:25,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:20:25,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:20:25,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:20:25,122 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_f0fbca49-b32a-4949-a419-c341910e6ed3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d887be7dd2c3278ee87053cbed7506ff3c2170c [2020-12-09 16:20:25,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:20:25,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:20:25,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:20:25,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:20:25,319 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:20:25,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2020-12-09 16:20:25,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/data/7251952db/1bc7b8fda27c4f78b5ba31dd7c6e1eae/FLAGc8239bc5a [2020-12-09 16:20:25,718 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:20:25,718 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2020-12-09 16:20:25,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/data/7251952db/1bc7b8fda27c4f78b5ba31dd7c6e1eae/FLAGc8239bc5a [2020-12-09 16:20:25,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/data/7251952db/1bc7b8fda27c4f78b5ba31dd7c6e1eae [2020-12-09 16:20:25,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:20:25,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:20:25,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:20:25,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:20:25,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:20:25,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12328e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25, skipping insertion in model container [2020-12-09 16:20:25,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:20:25,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:20:25,859 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_f0fbca49-b32a-4949-a419-c341910e6ed3/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2020-12-09 16:20:25,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:20:25,877 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:20:25,886 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_f0fbca49-b32a-4949-a419-c341910e6ed3/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2020-12-09 16:20:25,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:20:25,902 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:20:25,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25 WrapperNode [2020-12-09 16:20:25,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:20:25,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:20:25,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:20:25,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:20:25,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:20:25,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:20:25,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:20:25,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:20:25,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... [2020-12-09 16:20:25,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:20:25,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:20:25,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:20:25,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:20:25,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/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 16:20:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:20:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:20:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:20:26,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:20:26,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:20:26,252 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-09 16:20:26,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:20:26 BoogieIcfgContainer [2020-12-09 16:20:26,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:20:26,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:20:26,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:20:26,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:20:26,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:20:25" (1/3) ... [2020-12-09 16:20:26,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f43d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:20:26, skipping insertion in model container [2020-12-09 16:20:26,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:20:25" (2/3) ... [2020-12-09 16:20:26,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f43d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:20:26, skipping insertion in model container [2020-12-09 16:20:26,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:20:26" (3/3) ... [2020-12-09 16:20:26,260 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c [2020-12-09 16:20:26,269 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:20:26,273 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-09 16:20:26,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-09 16:20:26,307 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:20:26,307 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:20:26,307 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:20:26,308 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:20:26,308 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:20:26,308 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:20:26,308 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:20:26,308 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:20:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-09 16:20:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:20:26,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:20:26,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:20:26,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:20:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:20:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash 155587567, now seen corresponding path program 1 times [2020-12-09 16:20:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:20:26,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103552742] [2020-12-09 16:20:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:20:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:20:26,523 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 16:20:26,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103552742] [2020-12-09 16:20:26,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:20:26,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:20:26,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427781435] [2020-12-09 16:20:26,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:20:26,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:20:26,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:20:26,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:20:26,549 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-12-09 16:20:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:20:26,630 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2020-12-09 16:20:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:20:26,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 16:20:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:20:26,637 INFO L225 Difference]: With dead ends: 92 [2020-12-09 16:20:26,638 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 16:20:26,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:20:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 16:20:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2020-12-09 16:20:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 16:20:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-09 16:20:26,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2020-12-09 16:20:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:20:26,665 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-09 16:20:26,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:20:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-09 16:20:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 16:20:26,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:20:26,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:20:26,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:20:26,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:20:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:20:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash -804784526, now seen corresponding path program 1 times [2020-12-09 16:20:26,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:20:26,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111538222] [2020-12-09 16:20:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:20:26,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:20:26,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434186030] [2020-12-09 16:20:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/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 16:20:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:20:26,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 16:20:26,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:20:26,764 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 16:20:26,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:20:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:20:26,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111538222] [2020-12-09 16:20:26,785 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:20:26,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434186030] [2020-12-09 16:20:26,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:20:26,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 16:20:26,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318067561] [2020-12-09 16:20:26,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:20:26,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:20:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:20:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:20:26,788 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2020-12-09 16:20:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:20:26,818 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-12-09 16:20:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:20:26,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 16:20:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:20:26,819 INFO L225 Difference]: With dead ends: 64 [2020-12-09 16:20:26,819 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 16:20:26,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:20:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 16:20:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-12-09 16:20:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 16:20:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-09 16:20:26,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2020-12-09 16:20:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:20:26,828 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-09 16:20:26,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:20:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-09 16:20:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 16:20:26,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:20:26,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:20:27,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 16:20:27,031 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:20:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:20:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -804047694, now seen corresponding path program 1 times [2020-12-09 16:20:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:20:27,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854542323] [2020-12-09 16:20:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:20:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:20:27,191 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 16:20:27,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854542323] [2020-12-09 16:20:27,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:20:27,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:20:27,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218027918] [2020-12-09 16:20:27,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:20:27,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:20:27,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:20:27,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:20:27,193 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 4 states. [2020-12-09 16:20:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:20:27,245 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-12-09 16:20:27,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:20:27,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 16:20:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:20:27,247 INFO L225 Difference]: With dead ends: 59 [2020-12-09 16:20:27,247 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 16:20:27,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:20:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 16:20:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2020-12-09 16:20:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 16:20:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-12-09 16:20:27,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 7 [2020-12-09 16:20:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:20:27,256 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-12-09 16:20:27,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:20:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-12-09 16:20:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:20:27,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:20:27,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:20:27,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 16:20:27,257 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:20:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:20:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash 404435477, now seen corresponding path program 1 times [2020-12-09 16:20:27,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:20:27,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115124841] [2020-12-09 16:20:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:20:27,274 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:20:27,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377091461] [2020-12-09 16:20:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/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 16:20:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:20:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 16:20:27,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:20:27,349 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 16:20:27,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:20:27,372 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 16:20:27,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115124841] [2020-12-09 16:20:27,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:20:27,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377091461] [2020-12-09 16:20:27,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:20:27,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 16:20:27,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109617923] [2020-12-09 16:20:27,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:20:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:20:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:20:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:20:27,375 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 6 states. [2020-12-09 16:20:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:20:29,852 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-12-09 16:20:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 16:20:29,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 16:20:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:20:29,854 INFO L225 Difference]: With dead ends: 100 [2020-12-09 16:20:29,854 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 16:20:29,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-09 16:20:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 16:20:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-12-09 16:20:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 16:20:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-12-09 16:20:29,864 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 9 [2020-12-09 16:20:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:20:29,865 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-12-09 16:20:29,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:20:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-12-09 16:20:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 16:20:29,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:20:29,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:20:30,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:20:30,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:20:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:20:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1567670847, now seen corresponding path program 1 times [2020-12-09 16:20:30,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:20:30,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618101131] [2020-12-09 16:20:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:20:30,087 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:20:30,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006965704] [2020-12-09 16:20:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/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 16:20:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:20:30,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 16:20:30,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:20:30,213 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 16:20:30,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:20:30,262 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 16:20:30,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618101131] [2020-12-09 16:20:30,262 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:20:30,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006965704] [2020-12-09 16:20:30,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:20:30,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-09 16:20:30,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532923351] [2020-12-09 16:20:30,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:20:30,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:20:30,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:20:30,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:20:30,263 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 8 states. [2020-12-09 16:20:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:20:32,837 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-12-09 16:20:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 16:20:32,839 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-09 16:20:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:20:32,839 INFO L225 Difference]: With dead ends: 78 [2020-12-09 16:20:32,839 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 16:20:32,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-12-09 16:20:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 16:20:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-12-09 16:20:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-09 16:20:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-09 16:20:32,845 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 13 [2020-12-09 16:20:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:20:32,845 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-09 16:20:32,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:20:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-09 16:20:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 16:20:32,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:20:32,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:20:33,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:20:33,047 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:20:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:20:33,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1352312707, now seen corresponding path program 1 times [2020-12-09 16:20:33,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:20:33,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436251039] [2020-12-09 16:20:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:20:33,083 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:20:33,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082580663] [2020-12-09 16:20:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/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 16:20:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:20:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 16:20:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:20:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 16:20:33,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:20:53,689 WARN L197 SmtUtils]: Spent 16.41 s on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-09 16:20:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 16:20:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436251039] [2020-12-09 16:20:53,867 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:20:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082580663] [2020-12-09 16:20:53,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:20:53,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 16:20:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078810376] [2020-12-09 16:20:53,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:20:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:20:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:20:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=17, Unknown=2, NotChecked=0, Total=30 [2020-12-09 16:20:53,868 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 6 states. [2020-12-09 16:20:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:20:53,985 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-12-09 16:20:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:20:53,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-09 16:20:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:20:53,987 INFO L225 Difference]: With dead ends: 66 [2020-12-09 16:20:53,987 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 16:20:53,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=23, Invalid=31, Unknown=2, NotChecked=0, Total=56 [2020-12-09 16:20:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 16:20:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-12-09 16:20:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 16:20:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-12-09 16:20:53,992 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 22 [2020-12-09 16:20:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:20:53,992 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-12-09 16:20:53,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:20:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-12-09 16:20:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 16:20:53,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:20:53,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:20:54,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:20:54,194 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:20:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:20:54,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1802737760, now seen corresponding path program 1 times [2020-12-09 16:20:54,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:20:54,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699464444] [2020-12-09 16:20:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:20:54,203 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:20:54,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990576246] [2020-12-09 16:20:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:20:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:20:54,239 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:20:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:20:54,257 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:20:54,292 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 16:20:54,292 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:20:54,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-09 16:20:54,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:20:54 BoogieIcfgContainer [2020-12-09 16:20:54,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:20:54,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:20:54,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:20:54,552 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:20:54,552 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:20:26" (3/4) ... [2020-12-09 16:20:54,553 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 16:20:54,584 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f0fbca49-b32a-4949-a419-c341910e6ed3/bin/utaipan/witness.graphml [2020-12-09 16:20:54,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:20:54,585 INFO L168 Benchmark]: Toolchain (without parser) took 28850.32 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 64.1 MB in the beginning and 68.6 MB in the end (delta: -4.6 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-12-09 16:20:54,585 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 100.7 MB. Free memory is still 80.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:20:54,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.19 ms. Allocated memory is still 100.7 MB. Free memory was 63.9 MB in the beginning and 76.5 MB in the end (delta: -12.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:20:54,586 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.88 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 75.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:20:54,587 INFO L168 Benchmark]: Boogie Preprocessor took 17.27 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 73.8 MB in the end (delta: 818.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:20:54,587 INFO L168 Benchmark]: RCFGBuilder took 305.82 ms. Allocated memory is still 100.7 MB. Free memory was 73.4 MB in the beginning and 51.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 16:20:54,587 INFO L168 Benchmark]: TraceAbstraction took 28296.72 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 50.7 MB in the beginning and 71.8 MB in the end (delta: -21.1 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2020-12-09 16:20:54,588 INFO L168 Benchmark]: Witness Printer took 32.82 ms. Allocated memory is still 121.6 MB. Free memory was 71.8 MB in the beginning and 68.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:20:54,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 100.7 MB. Free memory is still 80.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 167.19 ms. Allocated memory is still 100.7 MB. Free memory was 63.9 MB in the beginning and 76.5 MB in the end (delta: -12.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.88 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 75.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.27 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 73.8 MB in the end (delta: 818.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 305.82 ms. Allocated memory is still 100.7 MB. Free memory was 73.4 MB in the beginning and 51.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28296.72 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 50.7 MB in the beginning and 71.8 MB in the end (delta: -21.1 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. * Witness Printer took 32.82 ms. Allocated memory is still 121.6 MB. Free memory was 71.8 MB in the beginning and 68.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [counter=0] [L35] EXPR counter++ VAL [counter=1] [L35] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=1] [L35] EXPR counter++ VAL [counter=2] [L35] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND TRUE !(r >= d) VAL [counter=2] [L45] EXPR counter++ VAL [counter=3] [L45] COND FALSE !(counter++<2) [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND TRUE !(cond) VAL [counter=3] [L17] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.1s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 161 SDtfs, 260 SDslu, 315 SDs, 0 SdLazy, 236 SolverSat, 117 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 85 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 21.1s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 104 ConstructedInterpolants, 19 QuantifiedInterpolants, 38624 SizeOfPredicates, 23 NumberOfNonLiveVariables, 314 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 16/16 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...