./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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 0d9c2ff65d0646ac972245f80cb55c586f722a41 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:01:11,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:01:11,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:01:11,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:01:11,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:01:11,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:01:11,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:01:11,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:01:11,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:01:11,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:01:11,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:01:11,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:01:11,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:01:11,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:01:11,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:01:11,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:01:11,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:01:11,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:01:11,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:01:11,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:01:11,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:01:11,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:01:11,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:01:11,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:01:11,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:01:11,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:01:11,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:01:11,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:01:11,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:01:11,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:01:11,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:01:11,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:01:11,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:01:11,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:01:11,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:01:11,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:01:11,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:01:11,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:01:11,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:01:11,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:01:11,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:01:11,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:01:11,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:01:11,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:01:11,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:01:11,276 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:01:11,277 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:01:11,277 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:01:11,277 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:01:11,278 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:01:11,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:01:11,278 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:01:11,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:01:11,280 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:01:11,280 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:01:11,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:01:11,281 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:01:11,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:01:11,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:01:11,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:01:11,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:01:11,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:01:11,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:01:11,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:01:11,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:01:11,284 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:01:11,284 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:01:11,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:01:11,285 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:01:11,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:01:11,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:01:11,286 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:01:11,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:01:11,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:11,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:01:11,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:01:11,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:01:11,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:01:11,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:01:11,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:01:11,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:01:11,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:01:11,289 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_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d9c2ff65d0646ac972245f80cb55c586f722a41 [2020-11-22 13:01:11,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:01:11,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:01:11,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:01:11,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:01:11,671 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:01:11,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2020-11-22 13:01:11,762 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/data/678a5e6e8/6bd349deac8049dc98e82e3048d4d881/FLAGa7707b504 [2020-11-22 13:01:12,310 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:01:12,311 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2020-11-22 13:01:12,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/data/678a5e6e8/6bd349deac8049dc98e82e3048d4d881/FLAGa7707b504 [2020-11-22 13:01:12,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/data/678a5e6e8/6bd349deac8049dc98e82e3048d4d881 [2020-11-22 13:01:12,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:01:12,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:01:12,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:12,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:01:12,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:01:12,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:12" (1/1) ... [2020-11-22 13:01:12,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ed3bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:12, skipping insertion in model container [2020-11-22 13:01:12,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:12" (1/1) ... [2020-11-22 13:01:12,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:01:12,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:01:12,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:12,968 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:01:13,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:13,025 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:01:13,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13 WrapperNode [2020-11-22 13:01:13,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:13,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:13,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:01:13,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:01:13,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:13,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:01:13,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:01:13,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:01:13,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... [2020-11-22 13:01:13,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:01:13,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:01:13,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:01:13,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:01:13,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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 [2020-11-22 13:01:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:01:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:01:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:01:13,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:01:13,781 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:01:13,782 INFO L298 CfgBuilder]: Removed 36 assume(true) statements. [2020-11-22 13:01:13,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:13 BoogieIcfgContainer [2020-11-22 13:01:13,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:01:13,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:01:13,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:01:13,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:01:13,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:01:12" (1/3) ... [2020-11-22 13:01:13,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f16e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:13, skipping insertion in model container [2020-11-22 13:01:13,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:13" (2/3) ... [2020-11-22 13:01:13,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f16e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:13, skipping insertion in model container [2020-11-22 13:01:13,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:13" (3/3) ... [2020-11-22 13:01:13,797 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound10.c [2020-11-22 13:01:13,810 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:01:13,816 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-22 13:01:13,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-22 13:01:13,866 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:01:13,866 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:01:13,867 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:01:13,867 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:01:13,867 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:01:13,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:01:13,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:01:13,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:01:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-22 13:01:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:01:13,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:13,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:01:13,894 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]=== [2020-11-22 13:01:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash 159617293, now seen corresponding path program 1 times [2020-11-22 13:01:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:13,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364396224] [2020-11-22 13:01:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:14,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364396224] [2020-11-22 13:01:14,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:14,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:01:14,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754269119] [2020-11-22 13:01:14,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:01:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:14,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:01:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:01:14,090 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-11-22 13:01:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:14,113 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2020-11-22 13:01:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:01:14,115 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-22 13:01:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:14,125 INFO L225 Difference]: With dead ends: 71 [2020-11-22 13:01:14,125 INFO L226 Difference]: Without dead ends: 34 [2020-11-22 13:01:14,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:01:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-22 13:01:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-22 13:01:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-22 13:01:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-22 13:01:14,169 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 5 [2020-11-22 13:01:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:14,170 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-22 13:01:14,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:01:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-22 13:01:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:01:14,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:14,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:01:14,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:01:14,172 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]=== [2020-11-22 13:01:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:14,173 INFO L82 PathProgramCache]: Analyzing trace with hash 156511088, now seen corresponding path program 1 times [2020-11-22 13:01:14,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:14,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102679853] [2020-11-22 13:01:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:14,200 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:14,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303702106] [2020-11-22 13:01:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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 [2020-11-22 13:01:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 13:01:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:14,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:14,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:14,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102679853] [2020-11-22 13:01:14,442 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:14,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303702106] [2020-11-22 13:01:14,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:14,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 13:01:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134762204] [2020-11-22 13:01:14,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:14,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:14,447 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-11-22 13:01:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:16,777 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-11-22 13:01:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:01:16,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 13:01:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:16,782 INFO L225 Difference]: With dead ends: 85 [2020-11-22 13:01:16,783 INFO L226 Difference]: Without dead ends: 79 [2020-11-22 13:01:16,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-22 13:01:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2020-11-22 13:01:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 13:01:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-11-22 13:01:16,806 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 5 [2020-11-22 13:01:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:16,810 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-11-22 13:01:16,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-11-22 13:01:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:01:16,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:16,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:01:17,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 13:01:17,026 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]=== [2020-11-22 13:01:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash 556911243, now seen corresponding path program 1 times [2020-11-22 13:01:17,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:17,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514003108] [2020-11-22 13:01:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:17,042 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:17,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168086785] [2020-11-22 13:01:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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 [2020-11-22 13:01:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:17,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:01:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:17,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:17,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514003108] [2020-11-22 13:01:17,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:17,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168086785] [2020-11-22 13:01:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 13:01:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673365938] [2020-11-22 13:01:17,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:17,175 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-11-22 13:01:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:17,219 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-22 13:01:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:17,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-22 13:01:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:17,224 INFO L225 Difference]: With dead ends: 64 [2020-11-22 13:01:17,225 INFO L226 Difference]: Without dead ends: 60 [2020-11-22 13:01:17,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-22 13:01:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-11-22 13:01:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:01:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-22 13:01:17,235 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-11-22 13:01:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:17,236 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-22 13:01:17,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-22 13:01:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:01:17,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:17,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:17,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:17,454 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]=== [2020-11-22 13:01:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash 83486771, now seen corresponding path program 1 times [2020-11-22 13:01:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:17,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374118603] [2020-11-22 13:01:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:17,468 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:17,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726339674] [2020-11-22 13:01:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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 [2020-11-22 13:01:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 13:01:17,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:17,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:17,603 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374118603] [2020-11-22 13:01:17,621 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726339674] [2020-11-22 13:01:17,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:17,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 13:01:17,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682280436] [2020-11-22 13:01:17,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:17,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:17,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:17,624 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-11-22 13:01:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:17,828 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-11-22 13:01:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:17,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-22 13:01:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:17,833 INFO L225 Difference]: With dead ends: 92 [2020-11-22 13:01:17,833 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 13:01:17,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 13:01:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-11-22 13:01:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-22 13:01:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-11-22 13:01:17,866 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 7 [2020-11-22 13:01:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:17,866 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-11-22 13:01:17,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-11-22 13:01:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:01:17,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:17,868 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:18,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:18,094 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]=== [2020-11-22 13:01:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash -608980738, now seen corresponding path program 1 times [2020-11-22 13:01:18,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:18,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171273518] [2020-11-22 13:01:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:18,108 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:18,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577847881] [2020-11-22 13:01:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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 [2020-11-22 13:01:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 13:01:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:18,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:18,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171273518] [2020-11-22 13:01:18,265 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:18,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577847881] [2020-11-22 13:01:18,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:18,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-22 13:01:18,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663149583] [2020-11-22 13:01:18,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:01:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:01:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:01:18,268 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 8 states. [2020-11-22 13:01:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:18,366 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-11-22 13:01:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:01:18,367 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-22 13:01:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:18,369 INFO L225 Difference]: With dead ends: 156 [2020-11-22 13:01:18,369 INFO L226 Difference]: Without dead ends: 110 [2020-11-22 13:01:18,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:01:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-22 13:01:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-11-22 13:01:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-22 13:01:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-11-22 13:01:18,396 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 15 [2020-11-22 13:01:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:18,398 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-11-22 13:01:18,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:01:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-11-22 13:01:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:01:18,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:18,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:18,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:18,618 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]=== [2020-11-22 13:01:18,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash -126968315, now seen corresponding path program 1 times [2020-11-22 13:01:18,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:18,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898598582] [2020-11-22 13:01:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:18,642 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:18,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247299970] [2020-11-22 13:01:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/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 [2020-11-22 13:01:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:01:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:18,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:01:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:18,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:18,779 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:18,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898598582] [2020-11-22 13:01:18,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:18,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247299970] [2020-11-22 13:01:18,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:18,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 13:01:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378542022] [2020-11-22 13:01:18,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:01:18,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:01:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:18,814 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 7 states. [2020-11-22 13:01:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:18,952 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-11-22 13:01:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:18,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-22 13:01:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:18,954 INFO L225 Difference]: With dead ends: 101 [2020-11-22 13:01:18,954 INFO L226 Difference]: Without dead ends: 99 [2020-11-22 13:01:18,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:01:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-22 13:01:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-11-22 13:01:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-22 13:01:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-11-22 13:01:18,975 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 15 [2020-11-22 13:01:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:18,975 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-11-22 13:01:18,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:01:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-11-22 13:01:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 13:01:18,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:18,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:19,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 13:01:19,194 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]=== [2020-11-22 13:01:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash -14347308, now seen corresponding path program 1 times [2020-11-22 13:01:19,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:19,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771509947] [2020-11-22 13:01:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:19,206 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:19,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176065870] [2020-11-22 13:01:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-22 13:01:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:19,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:01:19,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 13:01:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:19,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:19,387 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:01:19,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771509947] [2020-11-22 13:01:19,426 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:19,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176065870] [2020-11-22 13:01:19,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993076674] [2020-11-22 13:01:19,454 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-11-22 13:01:19,454 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:19,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:19,466 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:19,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:19,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:01:20,064 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-11-22 13:01:20,602 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:20,889 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-11-22 13:01:21,281 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-22 13:01:21,712 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-11-22 13:01:22,235 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-11-22 13:01:23,245 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-11-22 13:01:23,733 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-11-22 13:01:24,211 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-22 13:01:24,994 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-11-22 13:01:25,576 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-11-22 13:01:26,257 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-11-22 13:01:27,101 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-11-22 13:01:27,360 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-11-22 13:01:27,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:27,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:01:27,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-22 13:01:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202059914] [2020-11-22 13:01:27,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:01:27,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:01:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:01:27,364 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 7 states. [2020-11-22 13:01:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:27,776 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2020-11-22 13:01:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:01:27,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-22 13:01:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:27,779 INFO L225 Difference]: With dead ends: 137 [2020-11-22 13:01:27,779 INFO L226 Difference]: Without dead ends: 131 [2020-11-22 13:01:27,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-11-22 13:01:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-22 13:01:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 73. [2020-11-22 13:01:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-22 13:01:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-11-22 13:01:27,803 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 21 [2020-11-22 13:01:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:27,803 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-11-22 13:01:27,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:01:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-11-22 13:01:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 13:01:27,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:27,806 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:28,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:28,022 INFO L429 AbstractCegarLoop]: === Iteration 8 === [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]=== [2020-11-22 13:01:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1677668213, now seen corresponding path program 1 times [2020-11-22 13:01:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:28,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708024280] [2020-11-22 13:01:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:28,034 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:28,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074581143] [2020-11-22 13:01:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:28,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 13:01:28,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:28,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:28,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708024280] [2020-11-22 13:01:28,179 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:28,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074581143] [2020-11-22 13:01:28,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039244180] [2020-11-22 13:01:28,185 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-22 13:01:28,185 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:28,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:28,186 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:28,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:28,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:01:28,604 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:28,849 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-11-22 13:01:29,305 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2020-11-22 13:01:29,450 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-22 13:01:29,720 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-22 13:01:30,165 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-22 13:01:30,480 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-22 13:01:31,135 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-11-22 13:01:32,471 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-22 13:01:32,837 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 13:01:32,837 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:32,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:01:32,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-22 13:01:32,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194501005] [2020-11-22 13:01:32,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 13:01:32,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:32,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 13:01:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-22 13:01:32,839 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 10 states. [2020-11-22 13:01:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:33,003 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-11-22 13:01:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-22 13:01:33,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-11-22 13:01:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:33,005 INFO L225 Difference]: With dead ends: 154 [2020-11-22 13:01:33,005 INFO L226 Difference]: Without dead ends: 150 [2020-11-22 13:01:33,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-11-22 13:01:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-22 13:01:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2020-11-22 13:01:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-22 13:01:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2020-11-22 13:01:33,020 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 21 [2020-11-22 13:01:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:33,020 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2020-11-22 13:01:33,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 13:01:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2020-11-22 13:01:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-22 13:01:33,021 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:33,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:33,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-22 13:01:33,250 INFO L429 AbstractCegarLoop]: === Iteration 9 === [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]=== [2020-11-22 13:01:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:33,250 INFO L82 PathProgramCache]: Analyzing trace with hash -468999629, now seen corresponding path program 1 times [2020-11-22 13:01:33,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:33,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815042927] [2020-11-22 13:01:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:33,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 13:01:33,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098064217] [2020-11-22 13:01:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-22 13:01:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:33,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:33,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815042927] [2020-11-22 13:01:33,417 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:33,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098064217] [2020-11-22 13:01:33,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710919220] [2020-11-22 13:01:33,420 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-11-22 13:01:33,420 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:33,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:33,420 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:33,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:33,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 13:01:33,805 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:34,357 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-11-22 13:01:34,779 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2020-11-22 13:01:34,905 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-22 13:01:35,108 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-22 13:01:35,413 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-11-22 13:01:35,805 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-11-22 13:01:36,175 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-22 13:01:37,025 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:37,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:01:37,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-22 13:01:37,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680486153] [2020-11-22 13:01:37,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:01:37,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:01:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:01:37,027 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand 8 states. [2020-11-22 13:01:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:37,029 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-11-22 13:01:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:01:37,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-22 13:01:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:37,030 INFO L225 Difference]: With dead ends: 115 [2020-11-22 13:01:37,030 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:01:37,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-22 13:01:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:01:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:01:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:01:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:01:37,032 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-22 13:01:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:37,032 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:01:37,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:01:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:01:37,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:01:37,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:37,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:01:37,251 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:01:37,251 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:01:37,251 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:01:37,251 INFO L274 CegarLoopResult]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2020-11-22 13:01:37,251 INFO L270 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: false [2020-11-22 13:01:37,251 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2020-11-22 13:01:37,251 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L270 CegarLoopResult]: At program point L46-3(lines 46 58) the Hoare annotation is: false [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L270 CegarLoopResult]: At program point L15-1(lines 14 20) the Hoare annotation is: false [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L270 CegarLoopResult]: At program point L15-3(lines 41 42) the Hoare annotation is: false [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point L15-4(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L270 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: false [2020-11-22 13:01:37,252 INFO L274 CegarLoopResult]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:01:37,252 INFO L270 CegarLoopResult]: At program point L15-7(lines 14 20) the Hoare annotation is: false [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L15-8(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L270 CegarLoopResult]: At program point L15-9(lines 51 52) the Hoare annotation is: false [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L15-10(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L270 CegarLoopResult]: At program point L15-11(lines 14 20) the Hoare annotation is: false [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L277 CegarLoopResult]: At program point L15-13(lines 14 20) the Hoare annotation is: true [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:01:37,253 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:01:37,254 INFO L274 CegarLoopResult]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2020-11-22 13:01:37,254 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:01:37,254 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 13:01:37,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:01:37 BoogieIcfgContainer [2020-11-22 13:01:37,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:01:37,263 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:01:37,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:01:37,264 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:01:37,264 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:13" (3/4) ... [2020-11-22 13:01:37,267 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:01:37,276 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-22 13:01:37,277 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:01:37,277 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:01:37,277 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:01:37,317 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_86e14d9d-47b9-4c3e-85ea-52166ffd45d2/bin/utaipan/witness.graphml [2020-11-22 13:01:37,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:01:37,318 INFO L168 Benchmark]: Toolchain (without parser) took 24656.38 ms. Allocated memory was 104.9 MB in the beginning and 232.8 MB in the end (delta: 127.9 MB). Free memory was 72.8 MB in the beginning and 170.7 MB in the end (delta: -97.8 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:37,319 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 78.2 MB in the end (delta: 30.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:37,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.38 ms. Allocated memory is still 104.9 MB. Free memory was 72.6 MB in the beginning and 82.7 MB in the end (delta: -10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:37,320 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.77 ms. Allocated memory is still 104.9 MB. Free memory was 82.1 MB in the beginning and 80.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:37,320 INFO L168 Benchmark]: Boogie Preprocessor took 32.30 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.6 MB in the end (delta: 918.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:37,321 INFO L168 Benchmark]: RCFGBuilder took 675.06 ms. Allocated memory is still 104.9 MB. Free memory was 79.6 MB in the beginning and 58.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:37,321 INFO L168 Benchmark]: TraceAbstraction took 23475.61 ms. Allocated memory was 104.9 MB in the beginning and 232.8 MB in the end (delta: 127.9 MB). Free memory was 58.1 MB in the beginning and 173.8 MB in the end (delta: -115.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:37,322 INFO L168 Benchmark]: Witness Printer took 54.21 ms. Allocated memory is still 232.8 MB. Free memory was 173.8 MB in the beginning and 170.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:37,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 78.2 MB in the end (delta: 30.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.38 ms. Allocated memory is still 104.9 MB. Free memory was 72.6 MB in the beginning and 82.7 MB in the end (delta: -10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.77 ms. Allocated memory is still 104.9 MB. Free memory was 82.1 MB in the beginning and 80.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.30 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.6 MB in the end (delta: 918.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 675.06 ms. Allocated memory is still 104.9 MB. Free memory was 79.6 MB in the beginning and 58.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23475.61 ms. Allocated memory was 104.9 MB in the beginning and 232.8 MB in the end (delta: 127.9 MB). Free memory was 58.1 MB in the beginning and 173.8 MB in the end (delta: -115.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Witness Printer took 54.21 ms. Allocated memory is still 232.8 MB. Free memory was 173.8 MB in the beginning and 170.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.3s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 247 SDtfs, 450 SDslu, 639 SDs, 0 SdLazy, 342 SolverSat, 80 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 295 GetRequests, 181 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 15.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 171 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 10 NumberOfFragments, 9 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 16399 SizeOfPredicates, 41 NumberOfNonLiveVariables, 705 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 17 InterpolantComputations, 11 PerfectInterpolantSequences, 6/24 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 correct! Received shutdown request...